Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601The Role of Honeybee Workers on Fruit Set and Their Characteristics in Some Plum Varieties5315364547310.21608/jpp.2016.45473ENM. A.Abd Al-FattahDepartment of Economic Entomology & Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt.I. E.ElshenawyDepartment of Pomology, Faculty of Agriculture, Cairo University, Giza, EgyptE. E.TharwatDepartment of Beekeeping, Plant Protection Institute, Agriculture Research Center, Ministry of Agriculture, Giza, Egypt.Sarah H.El-DerenyDepartment of Beekeeping, Plant Protection Institute, Agriculture Research Center, Ministry of Agriculture, Giza, Egypt.Journal Article20190822The present study was carried out on three plum cultivars; Golden Japanese, Hollywood and Santarosa during two successive seasons 2012 and 2013 to study the influence of different pollination treatments on fruit set and fruit characteristics of the studied cultivars. Several sequential treatments were applied from 1 bee visit/ flower up to ten bee visits/ flower besides zero visit (self-pollination/ control) and open pollination treatments. The relationship between the foraging activity of honeybees in cross-pollinated flowers of plum cultivars and both fruit set and the main fruit characteristics were investigated. Bee foragers expressed significant benefit to plum cultivars on final fruit set as well as on fruit characteristics; length, diameter, T.S.S. %, fruit weight and volume and improved fruit quality through decreasing fruit firmness.Results of the present study showed direct improvements as a result of increased bee visits/ flower which were reflected on significant increase in fruit set when comparing self-pollination with open insect pollination. Results were 18.7%, 86.7%; 27.5%, 95.7%; 28.6%, 91.3% for season 2012 and 19.7%, 87.5; 26.9%, 96.0%; 26.1%, 94.7% for season 2013, for the three studied cvs., respectively.Moreover, fruit characteristics showed positive effects of increasing bee visits/ flower were expressed as significant improving in fruit weight which averaged 19.93 g, 27.10 g, 28.16 g for studied plum cvs., respectively, as a result of zero bee visit/ flower and continued its significant improving to reach 84.00 g, 95.75 g, 89.97 g for open bee visits/ flower in season 2012. Similar trend was observed for season 2013.Consequently, significant improvements in fruit volume, fruit length, diameter, T.S.S. % and firmness were recorded and presented. Thus, it can be recommended from results of the present study to maintain sufficient honey bee colonies in Golden Japanese, Hollywood and Santarosa plum orchards that offer at least ten bee visits/ flower to increase fruit set and to achieve satisfactory improvement in yield and fruit characteristics.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Some Growth Regulators in The Presence of Boron on Growth, Yield and Chemical Composition of Common Bean Under Different Sowing Dates5375434547610.21608/jpp.2016.45476ENM. H. M.MohamedHorticulture Department, Faculty of Agriculture, Benha University, Egypt.Journal Article20190822Two field experiments were carried out during the two successive summer seasons of 2014 and 2015 in a private sector farm at Kafr Elsohbi Village, Shibin Alqanter, Qalubia Governorate, Egypt to improve the growth, productivity and quality of common bean (<em>Phaseolus vulgaris L</em>.) cv. Nebrasica using some growth regulators i.e., naphthalene acetic acid (NAA) at 40 ppm, gibberellic acid (GA<sub>3</sub>) at 100 ppm, benzyladenine (BA) at 40 ppm supplemented with boron spray at 100 ppm grown at different sowing dates (mid February, mid March and mid April). In general the tallest plants were scored by the combinations of mid March planting date, with those received NAA+B. In addition, the highest number of branches and leaves as well as the heaviest fresh and dry weights of plant were registered by the combination of mid March sowing date, with those received BA+B treatment in the two seasons. Moreover, the highest dry seed yield/plant, seed yield/fed and weight of 100 seeds were scored by the combination of BA+B-sprayed plants with sowning on mid March in the two seasons. Furthermore, leaf and seed chemical composition i.e., total nitrogen, phosphorus, potassium and total carbohydrates as well as total protein were greatly responded for the studied sowing dates. However, mid March sowing date gave rise to the highest values of N, P, total carbohydrates and total protein contents, followed by mid February sowing date, especially those sprayed with BA+B treatment in the two seasons.Conclusively, in order to produce higher dry seed yield with good quality of common bean, it is preferable to sow the seeds on mid March and spray the plants with benzyladenine at 40 ppm enriched with boron at 100 ppm three time during the growing season. Additionally, the plants that sown on mid February and April could give the previously mentioned prospective traits when sprayed with benzyladenine and boron treatments.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Partial and Full Substitution of Chemical Fertilizer by Organic Fertilizer in Presence of Bio Fertilizer and Seaweed Extract and Its Influences on Productivity and Quality of Head Lettuce Plants5455524547910.21608/jpp.2016.45479ENM. H. M.MohamedHorticulture Department, Faculty of Agriculture, Benha University, Egypt.R. M. Y.ZewailBotany Dept., Fac. Agric., Benha Univ., Egypt.Journal Article20190822This study was undertaken during the two winter seasons (2014/2015 and 2015/2016) in a private Farm at Kafr Elsohbi Village, Shiben Elqanter, Qalubia Governorate, Egypt, to evaluate the partial and full substitution of mineral nitrogen fertilizer by organic fertilizer in presence of bio fertilizer, foliar spray with different concentrations of seaweed extract (Algreen) and their combinations on vegetative growth parameter, chemical composition, total yield and quality of head for lettuce plants (<em>Lactuca sativa var. capitata</em>) cv. Great lakes, grown under sandy loam soil condition during the winter season. Obtained results showed that the tallest plant and the highest number of leaves/plant were recorded by the combination between 100% mineral fertilizer treatment (T1) and seaweed extract at 3ml/l-sprayed plants, whereas the largest head diameter and the heaviest fresh and dry weights/plant and total yield/fed. were achieved by the combination between 200% organic fertilizer (T5) and seaweed extract at 3ml/l, followed by the combined treatment between T1 and seaweed extract at 3ml/l . T1 treatment statistically induced the highest values of leaf N, P, K and total carbohydrates content, followed by the treatment of T5, particularly those received seaweed extract at 3ml/l. additionally, the highest values of leaf total sugars contents were gained by the treatment of 100% organic fertilizer (T4) and 200% organic fertilizer (T5), particularly those received seaweed extract at 3ml/l. Furthermore, the treatments of T4 and T5 statistically decreased leaf nitrate content, especially those sprayed with seaweed extract at 3ml/l when compared with the treatment of T1, particularly those received no seaweed extract which induced the highest values of leaf nitrate content in the two seasons.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Estimation of Combining Ability for Yield and its Components in Barley Under Normal and Stress Drought Condition5535584548510.21608/jpp.2016.45485ENM. S.SultanAgronomy Dept., Fac. Agric., Mansoura Univ. EgyptM. A.Abdel-MoneamAgronomy Dept., Fac. Agric., Mansoura Univ. EgyptSoad H.HaffezAgronomy Dept., Fac. Agric., Mansoura Univ. EgyptJournal Article20190822This study was carried out at the Experimental Farm in Agronomy Department, Faculty of Agriculture, Mansoura University during the two seasons 2012/2013 and 2013/2014 using six diverse barley genotypes (<em>Hordeum vulgare</em> L.). All possible parental combinations without reciprocals were made among the six genotypes, giving 15 crosses. The six parental genotypes and 15 F<sub>1</sub>'s were evaluated in two experiments. The first experiment, was irrigated with the recommended treatment <em>i.e</em> three irrigations after planting irrigation (normal condition), and the second one was irrigated with planting irrigation only (drought condition). Plant height, spike length, number of grains/spike, number of spikes/plant, 100–grain weight and grain yield /plant were studied . Results indicated that water stress treatments decreased the means of all studied traits for parents and their hybrids. Statistical analysis revealed highly significant effects of genotypes, GCA and SCA for all studied traits, providing evidence for presence of large amount of genetic variability. The estimates of GCA effects showed that, P<sub>1</sub> was a good combiner for number of grains/spike and 100-grain weight under both conditions, spikes/plant under Normal and plant height and grain yield/plant under stress; P<sub>2</sub> for grain yield/plant under both conditions, spike length, spikes/plant, number of grains/spike under normal and plant height under stress ; P<sub>3</sub> for plant height, 100 grain weight under both conditions and number of grains/spike under normal; P<sub>4</sub> for grain yield/plant under both conditions, spikes/plant under normal and plant height under stress; P<sub>5</sub> for plant height and number of grains/spike under stress and P<sub>6</sub> for spike length and 100 grain weight under stress. For SCA estimates, it could be summarized that the best hybrids were cross No. 1, 9 and 10 for most studied traits under both conditions. Drought susceptibility index (DSI) used to estimate relative stress injury because it accounted for variation in yield potential and stress intensity. This index could be estimated based on many traits. which included Giza 123, Giza 129, crosses No. 3 and 10 were tolerant for most traits, indicating the importance of these parents in this regard.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Mineral Fertelizer and Compost on Vegetative Growth and Essential Oil Content of Yarrow (Achillea millefolium l.) Plant.5595654552310.21608/jpp.2016.45523ENHekmat Y.MassoudVeg. and Flor. Dept., Fac. of Agric., Mansoura UniversityH. H.Abdel-KaderVeg. and Flor. Dept., Fac. of Agric., Mansoura UniversityFatma R.IbrahimVeg. and Flor. Dept., Fac. of Agric., Mansoura UniversityAml M.IbrahimVeg. and Flor. Dept., Fac. of Agric., Mansoura UniversityJournal Article20190822Two pot experiments were carried out at the Experimental Farm of Medicinal and Aromatic Plants, Faculty of Agric., El-Mansoura Univ., Egypt during the two successive seasons of 2012-2013 and 2013-2014 to investigate the effect of NPK fertilizer and compost treatments on vegetative growth and essential oil of yarrow plant (<em>Achillea millefolium</em> L<em>.</em>). Treatments were arranged in a split block design with 3 replicates, which were the simple possible combinations between compost rates (0, 11, 22 and 33 g/ pot) as main plots and NPK rates (0, 1, 2 and 3 g/ pot) as sub plots. The effect of treatments on vegetative growth parameters, inflorescences production ,essential oil percentage and content of the inflorescences were recorded. Data revealed that increasing compost levels significantly increased all the pre-mentioned parameters. The highest values recorded for compost treatments were those using compost at a rate of 33g/ pot. As for NPK fertilization, data also showed that plants received 3 g /pot produced the highest values of all the previously mentioned parameters of yarrow plants. On the same way, the interaction between compost treatments and NPK fertilization significantly affected all traits. The highest values of all parameters in both seasons were recorded from plants received the interaction treatment of compost at 33 g/ pot plus NPK at 3 g/pot.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Response of Egyptian Hybrid Rice One Cultivar to Times of Nitrogen Application and Foliar Spraying of Ascobien Compound5675744552610.21608/jpp.2016.45526ENMariam T.WissaRice Research and Training Center (RRTC), Field Crops Research Institute (FCRI), Agricultural Research Center (ARC) , Sakha, Kafr El-Sheikh ,Egypt.M. M. A.Awad-AllahRice Research and Training Center (RRTC), Field Crops Research Institute (FCRI), Agricultural Research Center (ARC) , Sakha, Kafr El-Sheikh ,Egypt.Nehal M.ElekhtyarRice Research and Training Center (RRTC), Field Crops Research Institute (FCRI), Agricultural Research Center (ARC) , Sakha, Kafr El-Sheikh ,Egypt.Journal Article20190822Two field experiments were conducted at the Experimental Farm of Rice Research and Training Center (RRTC),Sakha, Kafr el-sheikh, Egypt during 2014 and 2015 seasons. The objective of this investigation was aimed to study the response of Egyptian hybrid rice one cultivar (SK 2034 H) to times of nitrogen fertilization and foliar spraying of ascobien compound. The nitrogen times of fertilization included four treatments i.e. Basal soil (B), Mid tillering (MT), panicle initiation (PI) and booting stage (BT). Foliar application of ascorbien compound at rate of 1.050 Kg/fed at two dates as follows, without ascorbien, spraying after transplanting by 25 days and at 25 and 45 days from transplanting. The main finding could be summarized as follows,1-Nitrogen fertilization splitting at rate of (69 Kg N/fed) at 17.25 Kg N/fed at B+ MT+ PI+ BT significantly maximize leaf area index, number of tillers /hill, number of filled grain/hill, 1000 grain weight and grain yield/fed, hulling, milling and broken rice percentage. 2- Foliar spraying of ascorbien compound twice at 25 and 45 days from transplanting significantly increased the previous studied traits as we mentioned before. 3- The interaction between times of nitrogen fertilization and foliar spraying of ascorbien compound significantly affected all the studied characters in this study. It could be concluded that splitting nitrogen at four equal doses (17.25 Kg N/fed) and foliar spraying of ascorbien compound at 25 and 45 days from transplanting of Egyptian hybrid rice one cultivar (SK 2034 H) was the recommended treatment to improve growth, yield components and grain quality and produced the greatest grain yield (4.48 t/fed) under the environment condition of Sakha Kafr El-sheikh. Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Some Different Sourses of Organic Fertilizers and Seaweed Extract on Growth and Essential Oil of Sweet Fennel (Foeniculum vulgare Mill.) Plants.5755844552810.21608/jpp.2016.45528ENE. A.EisaMedicinal and Aromatic Research Department, Hort. Res. Inst.,Agric. Res.Center, Giza, Egypt.Journal Article20190822This work was carried out during the two successive winter seasons of 2014/ 2015 and 2015/ 2016 at Meet Assas village, (Private Farm) Gharbieh Governorate, Egypt, on sweet fennel plants, to investigate the utilization of some different sources and rates of organic manure (chicken and farmyard manure) at 50 and100 % of recommended rate / fed., foliar fertilizer of seaweed extracts ( without and with 2 g / liter) compared with mineral NPK fertilizer at 50 and 100 % of recommended rate /fed., and their interaction on plant growth, yield (bulb and fruit fennel) and chemical composition. The application of farmyard manure at 100 % with seaweed extract showed increased growth compared to the chicken manure at 100% or inorganic fertilizer at 100% with seaweed extracts in the plant fresh and dry weight, plant height, number of leaves, bulb and fruits yield, as well as essential oil. Similarly, chemical parameters have also shown increased from farmyard manure over the inorganic fertilizers. Thus our study provides the evidence for using seaweed extract with organic fertilizer like farmyard manure by farmers to have better yield to produce from bulbs and fruits, organic manure is easy available, environmentally safe and cost effective in sweet fennel plantsMansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Stimulating Postharvest Characteristics and Artificial Coloring of Gladiolus (Gladiolus hybrid cv. White prosperity) Cut Spikes.5855914553010.21608/jpp.2016.45530ENOmaima M.Abd El- KafieVeget. & Floric. Dept., Fac. Agric., Mansoura Univ.M. M.KasemVeget. & Floric. Dept., Fac. Agric., Mansoura Univ.O. H.MohammedVeget. & Floric. Dept., Fac. Agric., Mansoura Univ.Journal Article20190822This investigation was conducted to evaluate the influence of some edible colors and plant growth regulators in the pulsing treatments of gladiolus cut spikes. 25ppm GA<sub>3</sub> and 5ppm kin with two pulsing periods (1 and 2 hours) for each, plus the distilled water as a control were used. Each growth regulator treatment was trans-located into nine dyeing treatments, as two edible colors [ponceau 4R (red) and brilliant blue (blue)] were used under two concentrations (3 and 6 g/l) for two dyeing periods (2 and 3 hours), beside the control (distilled water without any dyeing substance). The results showed that the superior combination of 25 ppm GA<sub>3</sub> for 2h and 6 g/l blue dye for 3h, recorded the highest values of the vase life, change of fresh weight water loss, water balance and finally the least average of bacterial count. Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Foliar Application of Yeast on Yield and Seed Quality of Some Rice Cultivars5936014553310.21608/jpp.2016.45533ENG. A.DewedarDepartment of Rice Research, Field Crops Research Institute, Agricultural Research Center, Egypt .E. A. M.IbrahimDepartment of Seed Technology Research, Field Crops Research Institute, Agricultural Research Center, Egypt .Journal Article20190822Two field experiments were conducted at El-Serw Research Station, Agricultural Research Center, Egypt, during 2012 and 2013 seasons to study the effect of 5 concentrations of dry yeast ( <em>Saccharomyces cervisia</em> ) <em>i.e.</em> 0, 2, 4, 6 and 8 g/L as foliar application at 25, 55 and 85 days after sowing on growth characters, yield and its components of Giza 178, Sakha 105 and Sakha 106 rice cultivars. The produced seeds obtained from the field experiment were investigated under Laboratory condition to study seed quality characters) seed, seedling vigor and its health) at Seed Technology Research Unit in Mansoura, Egypt. Results revealed that Giza 178 cv. was significantly thumping as compared with other studied cultivars in all studied characters of both growth and yield components. Maximum growth and yield components were produced from foliar spraying with 6 or 8 g/L dry yeast where show enhancement in heading date, plant height, number of tillers, and increased dray matter, number of panicles, panicle length, 1000 grain weight and grain yield with high significant in both seasons. The data of seed and seedling vigor test showed that Giza 178 cv. gave the highest values of normal seedlings (GP), speed germination (SG), seedling length (SL), while Sakha 105 cv. gave the highest values of dry weight followed by Sakha 106 cv. as compared with other cultivars. On the other hand, foliar spraying with 6 or 8 g/L dry yeast were the best treatments of seed and seedling vigor as compared with control and other concentrations of dry yeast and also decreased abnormal seedlings and seed rot percentages with significant effect. Seed health test recorded thirteen fungus species were associated with seeds of three cultivars under study. Giza 178 cv. was the less values of total fungi, followed by Sakha 106 and Sakha 105 cvs. <em>Alternaria padwickii</em> showed maximum values presented on seeds of three cultivars followed by <em>Bipolaris oryzae</em>, <em>A. longesima</em>, <em>Fusarium semitectum</em>, <em>A. tenuis, F. graminearum</em> and <em>Sarocladium</em> <em>oryzae</em> …et. The beneficial effects of yeast lead to lower the number of seed-borne fungi with increasing concentration from 2 to 8 g/L especially pathogenic fungi which caused reduction to seed and seedling vigor of rice. It could be recommended that use of foliar spray with dry yeast (<em>S. cervisia</em>) at 6 - 8 g/L at 25, 55 and 85 days after rice sowing gave the highest values of yield, yield components and next enhanced seed, seedling vigor and lower numbers of seed-borne fungi associated with rice seeds(seed quality(.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Rootstocks and Grafting Methods on Watermelon (Citrullus lanatus) Production6036094553410.21608/jpp.2016.45534ENT. M.El-GazzarVeg. and Ornamental Dept., Fac. Agric., Mansoura Univ., Egypt.K. K.DawaVeg. and Ornamental Dept., Fac. Agric., Mansoura Univ., Egypt.E. A.IbrahimCross Pollinated Veg. Crops Res. Dept., Hort. Res. Inst., Agric. Res. Center, Giza, EgyptA. M.El-AwadyCross Pollinated Veg. Crops Res. Dept., Hort. Res. Inst., Agric. Res. Center, Giza, EgyptJournal Article20190822The present study was carried out at a private nursery in Mansoura city and a private farm at Zayyan region, Belqas district, Dakahlia Governorate during the two summer seasons of 2014 and 2015 to study the effects of different rootstocks and grafting methods on growth, yield and fruit quality of watermelon cv. Aswan F<sub>1</sub>. The experiment included thirteen treatments resulted from the combinations of four rootstocks [Jumbo F<sub>1</sub> and Nun 6001 F<sub>1</sub> hybrids <em>(Cucurbita maxima × Cucurbita moschata</em>), Bottle gourd (<em>Lagenaria siceraria </em>Standl.) and Pumpkin<em> (Cucurbita moschata </em>L.)] and three grafting methods [ Hole insertion (HIG), Splice (SG) and Tongue approach (TAG)] as well as non-grafted plants (control). The treatments were arranged in a randomized complete blocks design with three replicates. The results indicated that grafting, especially onto Jumbo rootstock using Tongue approach grafting method, recorded the greatest values of vegetative growth parameters (lateral stems number, leaves number and foliage dry matter %), female flowers number and early and total fruit yield compared to non-grafted plants in both seasons. Grafting combinations didn’t show any significance differences with regard to sex ratio. Furthermore, there was a balance between number of fruits per plant and average fruit weight which eventually led to early and total yield increasing compared to non-grafted plants in both seasons. The highest values of total soluble solids (TSS), reducing sugars, vitamin C and Lycopene were estimated in the fruits of grafted plants onto Jumbo rootstock compared to other rootstocks in both seasons. On the other hand, the grafting methods had insignificant effects on fruit quality during both seasons. Therefore, the using of Jumbo as rootstock and Tongue approach as grafting method may be a successful strategy to increase vegetative growth, yield and fruit quality of watermelon cv. Aswan F<sub>1</sub> under similar conditions of this study.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Residual Effect of Used Herbicides in Sweet Potatoes on Some Succeeding Vegetables Crops Establishment and Associated Weeds.6116184554010.21608/jpp.2016.45540ENR. A.MousaWeed Research Central Laboratory, Agric. Res, Cent., Giza, Egypt.A. E. M.EataVegtable Research Department, Horticulture Research Institute, Agric. Res, Cent., Giza, Egypt.Journal Article20190822Little information is known about residual effects of herbicides which use in crop rotations crops and succeeded crops especially vegetable crops grown in these rotations. For this reason two field experiments were conducted in clay soil at EL-Serw Agricultural Research Station, Agricultural Research Center, Damietta Governorate during 2012/13 and 2013/14 winter seasons to study the effect of previous herbicides in non-disturbed soil in experimental plots after harvest of sweet potatoes with removing thrones its and their associated weeds. Herbicides used in the preceding crops during 2012 and 2013 summer seasons being Gesagard 50% SC(prometryn) at 1.0L /faddan, Harness 84% EC(acetochlor) at 1.0L /faddan, Stomp45.5% CS(pendimethalin) at 1.0L /faddan, Sencor 60% SC(metribuzin) at 0.3 L/faddan and added post–emergence herbicides i.e., Select super 12.5%EC(clethodim) at 0.5L /faddan and Fusilade fortey15% EC(fluzifop-p-butyl) at 1.0L /faddan treatments on the establishments of succeeding vegetable crops and weed growth associated in onion, pea, snap beans, cucumber, squash, snake melon and cowpea. The main findings of study show big variation in the residual effects of herbicides which applied in sweet potatoes fields varied from one succeeding vegetable crops establishments to another. For example, onion plant stand at 30 days from sowing can tolerate the residual effects of Gesagard 50% SC + Select super 12.5%EC, Harness 84% EC and Stomp45.5% CS. Squash stand can tolerate the residual effects of Stomp45.5% CS and Harness 84% EC. Cucumber stand can tolerate residual effect of Stomp 45.5% CS, snake melon stand can tolerate the residual effects of Stomp 45.5% CS and Harness 84% EC . Pea can tolerate to somewhat Stomp45.5% CS residues in soil on contrary with both snap beans or cowpea stands had effected drastically and considered very sensitive to residual effects of herbicides in soil previously treated with such herbicides. Concerning the effect of previous herbicides applied in sweet potatoes were poorer with no effects on weeds associated with succeeding vegetable during 2013/2014 season. Thus soils treated in crop rotations with herbicides showed be degraded before growing any succeeding vegetable crops by blowing 2-3 times before planting these crops. Depending on this study more attention towards any determination effects of herbicide residues on environment before herbicide registration by bioassay tests or chemicals. Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Employment of Tissue Culture Techniques in Improvement Propagation of Paulownia Tomentosa Plant6196254554310.21608/jpp.2016.45543ENY. GhatasHorticulture, Dept. Fac. of Agric., Benha University, Egypt.Journal Article20190822Different media and explant types, anti-oxidant pre-treatments, additives, cytokinin types &concentrations as well as medium strength, GA3 concentrations, auxin types &concentrations were studied to find out the best protocol of <em>in vitro </em>propagation of <em>Paulownia tomentosa</em>. The results indicated that culturing of pre-treated shoot tips with anti-oxidant solution on modified Murashige&Skoog medium supplemented with PVP and activated charcoal as anti-oxidants, as well as adenine sulphate and coconut milk as additives maximized survival percentage and improved explant development. Also, using of 2mg/ L BAP increased proliferation. Addition of 1.0 mg/ L GA3 to half strength medium maximized shoot length. Moreover, addition of 1.0 IBA to the culture medium encouraged the highest shoot length and number of roots.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of GA3 and Chemical Fertilization Treatments on Growth, Flowering, Corm Production and Chemical Composition of Gladiolus grandiflorus Plant6276364554410.21608/jpp.2016.45544ENY. A. A.GhatasHorticulture, Dept. Fac. of Agric., Benha University, Egypt.Journal Article20190822This study was undertaken during two successive seasons (2012/2013 & 2013/2014) to evaluate the effect of GA<sub>3 </sub>foliar sprays at (0.0, 50, 100 and 150 ppm.) and chemical fertilization NPK at aratio of 1:1:2 namely (0.0, 2, 4 and 6 g / plant) as well as their combination on the growth, flowering, corm production and chemical composition of <em>Gladiolus grandiflorus</em> cv. White Prosperity plant. Obtained results showed that all tested GA<sub>3 </sub>concentrations and NPK chemical fertilizers treatments as well as their combination increased vegetative growth parameters i.e., leaf length, leaf area, number and fresh weight of leaves / plant as compared with control in the two seasons. Moreover, the longest spike and flowering portion as well as the highest number of florets / spike were scored by GA3 at 150 ppm combined with chemical fertilizer at 6 g / plant in the two seasons. The thickest spike and the heaviest fresh spike were recorded by GA3 at 100 ppm enriched with chemical fertilizer at 6 g / plant, while the thickest lower floret was gained by the combined treatment between GA3 at 50 ppm and chemical fertilizer at 6 g / plant in the two seasons. Moreover, GA3 at 50 ppm supported with chemical fertilizer at 6 g / plant produced the thickest corm and the heaviest fresh corm in the two seasons. Whereas, the highest number of cormels and the heaviest fresh cormels / plant were recorded by 100 ppm GA3-sprayed plants , fertilized with chemical fertilizer at 6 g / plant in the two seasons. Also, all tested combinations between GA3 and NPK chemical fertilizer significantly increased leaf N, P, K and total carbohydrates content, particularly using the combinations between GA<sub>3 </sub>at 150 or 100 ppm and NPK chemical fertilizer at 4 or 6 g/plant in both seasons. Conclusively, treating <em>Gladiolus grandiflorus</em> cv. White Prosperity plants with GA3 at 150 or 100 ppm combined with NPK chemical fertilizer at 4 or 6 g/plant showed the best vegetative, corm production and flowering characteristics with high quality.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Performance of Some Hybrid Rice Combinations Under Different Irrigation Intervals and Sowing Dates6376434554610.21608/jpp.2016.45546ENA. A. B.Abou KhalifaRice Res. Dept. Field Crops Res. Inst., ARC, EgyptM. M. A.Awad-allahRice Res. Dept. Field Crops Res. Inst., ARC, EgyptJournal Article20190822Two field experiments were conducted at the farm of Sakha Agricultural Research Station – Sakha, Kafr- El sheikh governorate, Egypt during 2014 and 2015 seasons to study the performance of some hybrid rice combinations to different dates of sowing and various irrigation intervals. Three hybrid rice combinations, namely; SK-2034H (H1), SK-2046H (H2) and SK-2151H (H3) were used under three dates of sowing (May, 1, May, 15 and May, 30) with three irrigation intervals i.e. every 4 days, every 8 days and every 12 days. A split-split plot design with four replications was used. The three dates of sowing were allocated in the main plots and the three irrigation intervals were devoted in sub-plots, while sub- sub were received the three varieties. The studied characters were light penetrations, leaf area index (LAI), chlorophyll content, crop growth rate, plant height, root depth, number of panicles /m<sup>2</sup>, 1000-grain weight, panicle length, number of spikelets / m<sup>2</sup> *1000, spikelets-leaf area ratio, number of grains/ panicle, grain yield (t/ha) and straw yield (t/ha). The main results indicated that May first followed by May,15 caused an increase in all the previous characters except light penetration and plant height at maximum tillering and late booting. As for irrigation intervals, either irrigation every 4 days or every 8 days were the best for all the studied characters except light penetration and rood depth which reached to the maximum value under irrigation every 12 days. Results also revealed that the hybrid SK-2034 H (H1) surpassed the other two studied hybrids in most of the studied characters and produced the greatest grain yield moreover saved reasonable amount of irrigation water (984,3 m<sup>3</sup>/ha ) under 8 days intervals. So it can be concluded that cultivate the hybrid SK-2034 H (H1) hybrid through the first two weeks of May and irrigate it every 8 days intervals was the best combination to get higher yield and save of irrigation water without significant reduction in the yield.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Interspecific Variations in Resistance, Avoidance and Tolerance to Salinity Stress Among 12 C3 Grass Species6456514554710.21608/jpp.2016.45547ENW. S.SolimanHorticulture Department, Faculty of Agriculture and Natural Resources, Aswan University, Aswan, Egypt.Journal Article20190822Resistance mechanism to salinity stress is divided into two components; avoidance and tolerance. In this study, interspecific differences in resistance, avoidance and tolerance to salinity stress were examined among 12 C<sub>3</sub> grass species. In a greenhouse, plants were exposed to 50, 100 or 200 mM of NaCl for two weeks using hydroponics system. We found that interspecific differences in resistance to salinity stress associated mainly with tolerance ability plus significant contribution of avoidance ability. Contribution of the genetic potential in the interspecific variation for resistance and tolerance was higher than that of Na+ concentration in the culture solution. Salinity stress had negative effects on shoot dry mass and water status. Relative water content correlated positively with resistance and tolerance, and negatively with avoidance. The species varied in proline content which associated positively with resistance and tolerance, and negatively with avoidance. Resistance and tolerance correlated negatively with relative growth rate and specific leaf area. These results suggested that the difference among species in resistance to salinity stress was due to both tolerance and avoidance. Proline content, relative growth rate and structural leaf properties may be used as indicators of future ability to tolerate salinity stress.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Effect of Waterdeficit on Seed Yield and Prolinecontent in Some Faba Bean Genotypes6536584554810.21608/jpp.2016.45548ENE. H.El-HartyFood Legume Crops Research Department, Field Crops Research Institute, Agricultural Research Center, 9 Gamma Street Giza 12619, Egypt.Journal Article20190822Drought stress is one of the most serious problems for agriculture production and sustainability. This study was carried out to investigate seed yield and its components in addition to estimate free proline content in leaves of nine faba bean genotypes with different types grown under three water regimes (well-watered, mild and severe drought).A field experiment was laid out in split plot with three replications during two growing seasons, 2013/14 and 2014/15. The results indicated that drought had pronounce negative effects on yield and its components for all faba bean yield characters, while the effect was positive with leaves proline content. Hassawi 2 out yielded all genotypes under all water treatments and was followed by Giza 843 and ILB 1814 under well irrigation and by Giza Blanka and Giza 843 under high drought stress. Furthermore Hassawi 2 and Nubaria 1 showed higher drought tolerance efficiency (42.3 and 39.5), less drought stress susceptibility index (0.6) and minimum reduction in seed yield 58.3 and 60.4%, respectively. Proline content ranged from 46.3μg/g for Gazira 2 to 69.7 for ILB 1814 under well-watered and from 89.8 for Kamline to 264.0 for Gazira 1 under severe drought. Proline content and seed yield/plant negatively correlated (r = -0.65**) over all treatments and was insignificant under both well-watered (r= 0.62) and high drought stress (r= 0.43). This indicated that proline content was drought stress sensor and could not use as selection parameter for drought tolerant genotype.Mansoura University, Faculty of AgricultureJournal of Plant Production2090-36697620160601Improving Growth and Active Constituents of (Coriandrum sativum l.) Plant Using Some Natural Stimulants Under Different Climate Conditions.6596694554910.21608/jpp.2016.45549ENHekmat Y.MassoudVeget. and Flori. Dept., Fac. Agric., Mansoura Univ., Egypt.H. H.AbdelkaderVeget. and Flori. Dept., Fac. Agric., Mansoura Univ., Egypt.E. A.El-GhadbanMed. and Arom. Res. Dept., Hort. Res. Inst., Agric. Res. Center, Dokki, Egypt.Reham M.MohammedMed. and Arom. Res. Dept., Hort. Res. Inst., Agric. Res. Center, Dokki, Egypt.Journal Article20190822The present study was carried out at El-Baramoon Experimental Farm, Hort. Res. Institute, Agric. Res. Center, Ministry of Agric., during the two seasons of (2013 / 2014) and (2014 / 2015) to study the effect of sowing dates (Sept., Oct.,Nov.,Dec.and Jan.) and foliar application of some natural stimulants (Seaweeds extract, Moringa leaf extract, Salicylic acid and Chitosan) as well as their interaction on vegetative growth, fruit yield and essential oil of coriander (<em>Coriandrum sativum</em> L.) plant. The results showed that sowing coriander seeds in October resulted in significant increase in growth characters, fruit yield and essential oil composition compared with other sowing dates in both seasons. Foliar applications of some natural stimulants (Chitosan, followed by Moringa leaf extract then Salicylic acid) significantly affected all studied parameters compared to the treatments of seaweed extract and the control plant. Moreover, the interaction treatments indicated that the highest means values for most growth characters, fruit yield and essential oil productivity were recorded from plants sown in October and sprayed with Chitosan. Delayed sowing in December and January and spraying with Moringa leaf extract gave good production at cold temperature. The G.L.C. of essential oil revealed total of 11 compounds. The main compound was linalool which constitutes 79.8 % in October sowing date with Chitosan foliar application and the sowing date in January with Moringa leaf extract application was 78.3 %.These results showed that, it is possible to produce coriander plants under different climate conditions by using some natural stimulants. Fruits yield and active constituents under early and normal sowing dates could be improved by spraying plants with chitosan foliar application, while under delayed sowing dates spraying plants with moringa leaf extract.