@article { author = {tartoura, sayed and El-Shal, Z. and Ahmed, B.}, title = {Effect of Irrigation Intervals under Different Sources of Potassium on Growth and Productivity of Garlic}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {689-699}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188385}, abstract = {Two field experiments were carried out at the Vegetable Crops Farm in Baramoon Research Station, Dakahlia governorate, Egypt, during the two winter seasons, to investigate the effect of irrigation intervals under different sources of potassium combined with foliar application nano-K fertilizer on plant growth and productivity of garlic cv.Sids 40. The experiment includes 42 treatments which arranged in strip-split block design, as the interactions between three irrigation intervals (14, 21 and 28 days) as vertical plots, seven sources of potassium fertilization (100% K-mineral (150 kg Potassium Sulphate/fed.), 100% K-biofertilizer (2 L/fed., PSDB, Bacillus circulans), 100 % K-natural (700 kg Feldspar/fed.), 50 % K- mineral (75 kg/fed.) +50 % K-natural (350 kg/fed.), 50 % K- mineral (75 kg/fed.)+inoculated by PSDB, 50 % K-natural (350 kg/fed.)+inoculated by PSDB, and 33% K- mineral (50 kg/fed.)+33% K-natural (235 kg/fed.)+inoculated by PSDB as horizontal plots and two foliar applications (with nano-K and without) as split plots. Obtained results indicated that, the fertilization of plants with different sources of potassium as 33% K-mineral (50kg/fed.)+33% K-natural (235 kg/fed.) combined with inoculated by PSDB (2 L/fed), showed the best vegetative growth parameters and the highest yield productivity followed by the treatment of 50% K- mineral+50 % K-natural combined with foliar application by 3000 ppm nano-K particles under irrigation every 21 days Therefore, we recommend this treatment because it saves in the amount of mineral potassium and the amount of irrigation water and thus reduces the costs of garlic production and environmental pollution under the same conditions.}, keywords = {Garlic,Irrigation intervals,Natural Sources,potassium,K-feldspar,potassium silicate,nano-K}, url = {https://jpp.journals.ekb.eg/article_188385.html}, eprint = {https://jpp.journals.ekb.eg/article_188385_f962cfc15bc39d0ce46dcc3895424445.pdf} } @article { author = {tartoura, sayed and I. Ahmed, H. and M. El Sayed, S.}, title = {Alleviation of Natural Salinity Stress on Seedlings and Growth of Cowpea Plants Using Some Different Protective Treatments}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {701-710}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188387}, abstract = {The current research was conducted to alleviate natural salinity stress on seed germination by seed priming and within turn on vegetative development using some different treatments. In laboratory, Seeds were soaked in chitosan (0.2 g/L), potassium silicate (1.1 g/L), and yeast extract (20 g/L) compared to control treatment for 3½ hours under different salinity stress (0, 5 and 7 dS/m)for 3½ with. Previous seeds were planted under the same levels of natural saline stress in two fields of the Agricultural Research Center in Damietta governorate, during 2018-2019 seasons. Two types of treatments were used, sulfur (0.4 ton/fed.) and sulfuric acid (10 L/ fed.) as soil amendments and the same previous soaking compounds used to seed priming as foliar application treatments. Results reveal that elevated the salinity stress had a negative feedback on cowpea seedlings and growth traits. Meanwhile, each of chosen protective treatments had significantly improvement of seed priming and vegetative growth traits. The major improved interaction for the formerly characteristics was the combined addition of sulphur in soil with spraying chitosan or with yeast extract under natural salinity stress. Therefore, we recommend adding sulfur to the soil (0.4 ton/fed.) before cultivation and soaking the seeds of cowpea (Kaha 1) to prepare it for germination (Seed priming) as well as spraying plants by chitosan (0.2 g/l) or spraying with yeast extract (20 g/l) after 20 days after sowing, three times, ten days intervals, to increase plant tolerance to natural soil salinity for obtain the best vegetable growth under the same conditions.}, keywords = {salinity stress,Seed priming,soil amendment,sulfur,sulphuric acid,foliar application,Chitosan,silicon,yeast extract}, url = {https://jpp.journals.ekb.eg/article_188387.html}, eprint = {https://jpp.journals.ekb.eg/article_188387_6ecdcea5c89c6de37825d0fee8991f54.pdf} } @article { author = {tartoura, sayed and Ahmed, H. and El Sayed, S.}, title = {Optimization of Cowpea Productivity and Seed Quality under Soil Natural Salinity Stress Using some Different Protective Treatments}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {711-718}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188404}, abstract = {This study was conducted with the aim is amelioration salinity stress and optimizes flowering, seed productivity and quality of cowpea(Kaha 1)under the stress of natural soil salinity using some different treatments during both successive seasons 2018-2019. The seeds of seed priming were grown under the same levels of natural saline stress, medium (5 dS/m) and high 7 dS/m) in two fields of El-Serw Agricultural Research Center, Damietta governorate. Sulfur (0.4 ton/fed.) and sulfuric acid (10 L/fed.)as soil amendments and chitosan (0.2 g/L), potassium silicate(1.1 g/L), and yeast extract (20 g/L)as different foliar applications in addition to untreated control. The layout of the current experiment was planned as split-split plot design in a completely randomized blocks design. The results conducted into a negative feedback of salinity stress on flowering, dry yield productivity and seed quality in comparing to improved ones by soil amendments or foliar applications. The major interaction in optimization flowering, dry yield and quality was less level of salinity stress (5 dS/m) interacted with mixed treatment between sulfur (0.4 ton/fed.), followed by sulfuric acid (10 L/fed.)amended with soil and sprayed with chitosan (0.2 g/L) or by yeast extract (20 g/L).Therefore, we recommend adding sulfur to the soil (0.4 ton/fed.) before planting as well as spraying plants with chitosan (0.2 g/l) or spraying with yeast extract (20 g/l) after 20 days of planting 3 times every 10 days to increase plant tolerance on soil salinity to obtain the best flowering, seed productivity and the highest quality under the same conditions.}, keywords = {salinity stress,soil amendment,sulfur,sulphuric acid,foliar application,Chitosan,silicon,yeast extract,seed quality}, url = {https://jpp.journals.ekb.eg/article_188404.html}, eprint = {https://jpp.journals.ekb.eg/article_188404_62113b94bd03fdc6738325f6bfb142fa.pdf} } @article { author = {Qaro, Shams-Aldeen}, title = {The Spatial Distribution Pattern of Naturally Developing (pinus brutia. Ten) Trees in The Atrush Region}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {719-723}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188407}, abstract = {(Pinus brutia. Ten) trees grows naturally in the Atrush region, on a wide range location from 31ʹ36° - 51ʹC 36°N and a longitude ranging from 20ʹ 43° - 21ʹ 43° E and above sea level (728-1127) meters, and the average decline between(3.65% - 18.91%).These forests are renewable natural resources and must be preserved, sustained and managed efficiently, and these require the preparation of basic preliminary data on what exists from these resources and how they interact with each other in the forest ecosystem. In this study, the coordinates of the sites of the spread of trees were measured in (20) samples in the research area.Three variables represented by the base area, height, diameter at chest height, crown diameter, crown height and other variables that measured for three stages of the life of trees that are initiatives (height less than 2 m), seedling (height more than 2 m and diameter less than 10 cm) and diameter(10 cm and more).Results showed that the pattern of distribution of communities is dominated by random pattern and for most distances and for three stages of life (initiatives, seedling and trees) with a little aggregate pattern with some sites heading to a state of regulator when there is little competition between species or between different stages of life, especially at locations in the east and northeast and long distances with the exclusion of Oak, (Quercus spp) from Pinus brutia, the random distribution pattern was reduced to about 50% and the melee went to the aggregate pattern.}, keywords = {spatial distribution,Pinus brutia,trees,Atrush}, url = {https://jpp.journals.ekb.eg/article_188407.html}, eprint = {https://jpp.journals.ekb.eg/article_188407_5f38867a3d65d3f5028d85b370535d87.pdf} } @article { author = {Leilah, A. and Seadh, Saleh and Abido, W. and Ahmed, Nourhan}, title = {Enhancement Wheat Germination and Seedlings Vigor By Using Some Growth Regulators, Antioxidants and Macro And Micronutrients}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {725-730}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188412}, abstract = {To enhancing seedlings parameters of bread wheat Misr 1 cultivar by soaking in ascorbic acid (AsA) as a source of antioxidant, indole-3-acetic acid (IAA) as a source of growth regulator, Truefert powder as a source of macronutrients (NPK) and Folifert powder as a source of micronutrients (Zn, Fe, Mn, Cu, B and Mo), a laboratory experiment was conducted at Agronomy Department Laboratory of Seed Testing, Faculty of Agriculture, Mansoura University, Egypt, during November 2018. The experiment was carried out in completely randomized design (CRD) with four replications. Results showed that treating wheat seeds with solution of ascorbic acid (AsA) + micronutrients at the rates of 0.1 g/l + 3.75 g/l, respectively for 12 hours was the best treatment which produced the maximum values of most seedlings characters, followed by soaking wheat seeds in indole-3-acetic acid (IAA) + micronutrients at the rates of 0.05 g/l+ 3.75g/l, respectively. It could be recommended that soaking wheat seeds Misr 1 cultivar in combination of ascorbic acid (AsA) + Micro (Zn, Fe, Mn, Cu, Mo and B) at the rates of 0.1 g/l+ 3.75g/l, respectively for 12 hours or indole-3-acetic acid (IAA) + micro (Zn, Fe, Mn, Cu, Mo and B) at the rates of 0.05 g/l+ 3.75g/l, respectively for 12 hours to improving germination and seedlings parameters.}, keywords = {Wheat,Soaking,Ascorbic acid (AsA),Indole-3-Acetic Acid (IAA),Macronutrients,Micronutrients,germination characters}, url = {https://jpp.journals.ekb.eg/article_188412.html}, eprint = {https://jpp.journals.ekb.eg/article_188412_0040cf91ab02b93a69126e5ed5cb65f5.pdf} } @article { author = {Abou Elyazid, Doaa and Gawish, M. and Eliwa, G.}, title = {Optimized Protocol for Micropropagation of Cadaman and Garnem Peach Rootstocks}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {731-735}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.83432.1038}, abstract = {The present study aimed to develop a micropropagation protocol for Cadaman (P. persica x P. davidiana) and Garnem (P. persica x P. dulcis) peach rootstocks. Stem nodal segments with one axillary bud used as explants. MS medium supplemented with different concentrations of BA with or without IBA was studied to determine the best  for multiplication stage,  The results revealed that MS medium supplemented with 2.0 mg/l BA+0.1 mg/l IBA was optimal for shoot proliferation of Cadaman rootstock, whereas MS containing 2.0 mg/l BA+ 0.0 IBA was advisable to Garnem peach rootstock. Concerning the effect of auxin type and concentration on the rooting stage, IBA at 1.0 mg/l was more effective on rooting induction of Cadaman shoots, whereas in case of Garnem rootstock both IBA and NAA auxins had a similar effect on the rooting process at the concentration of 1.0 mg/l individually. After acclimatization, survival rate was 83% and 63.3% for Cadaman and Garmen rootstocks, respectively.}, keywords = {micropropagation,BA,IBA,Garmen,Cadaman}, url = {https://jpp.journals.ekb.eg/article_188416.html}, eprint = {https://jpp.journals.ekb.eg/article_188416_8b6fa4fe04b1b57d16147874b5901230.pdf} } @article { author = {El-Douby, K. and Abd raboh, Asem and Abou Mowafy, M.}, title = {Impact of Plant Density and Leaves Defoliation of Sunflower Intercropped with Sugar Beet on The Productivity of Both Crops and Competitive Relationships}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {737-745}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.84134.1041}, abstract = {At Sakha Agricultural Research Station, two field experiments were conducted during  2018/2019 and 2019/2020 seasons to study the effect of sunflower densities (12.5, 25.0 and 37.5 % from the recommended) and defoliation (25.0, 37.5 and 50.0 % leaves) of sunflower intercropped with sugar beet on productivity and quality of both crops and economic evaluation. The productivity of sugar beet root yield t/fed. reached 83.69 and 83.07% compared to pure stand in both seasons, respectively. Simultaneously, increase defoliation of sunflower leaves increased all studied characters of sugar beet in both seasons. Sugar beet yields i.e. root, top and sugar yield t/fed were significantly affected by the interaction between plant density and leaves defoliation ratio in both seasons. Plant height, seed yield kg/fed. and oil yield kg/fed. of sunflower were increased by increasing sunflower plant densities from (12.5 to 37.5) in both seasons. All studied characters of sunflower were not significantly affected by increasing defoliation except, 100-seed weight and seed yield/plant in both seasons. Stem and head diameter, seed yield/plant and seed oil % were significantly affected by the interaction between plant density and defoliation ratio in both seasons. The treatment of intercropping sunflower with the highest density and 50% defoliation gave the highest values for land equivalent ratio (LER), total and return incomes in both seasons. It could be concluded that sunflower intercropped with sugar beet at (37.5%) and 50% sunflower leaves defoliation gave the highest LER, total income and economic return for sugar beet and sunflower were obtained when .}, keywords = {Sunflower,Sugar beet,yield,economic evaluations}, url = {https://jpp.journals.ekb.eg/article_188423.html}, eprint = {https://jpp.journals.ekb.eg/article_188423_dda9b1261c66689de02bd2dfdf369ebd.pdf} } @article { author = {Ibrahim, Heba}, title = {Effect of Methyl Jasmonate, Salicylic Acid and Their Combination on Growth and Bioactive Constituents in Cichoriun intybus L.}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {747-755}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.187442}, abstract = {The current study was conducted to evaluate the efficiency of seedling’s roots-feeding of the elicitor solution of methyl jasmonate (MeJ), salicylic acid (SA) and their combination as an elicitation approach for enhancing the biosynthesis of cichory’s main bioactive secondary metabolites. The long-lasting elicitation effect of both MeJ and SA was also evaluated through comparing the level of bioactive compounds in treated plants of the first harvest with those of the second one. Results indicated that MeJ, SA, and their combination decreased growth of cichory plants whereas increased their potential to biosynthesize their characteristic bioactive secondary metabolites. Shoots and roots of MeJ-, SA- and MeJ+SA-treated plants contained significantly higher contents from ascorbic acid as well as total antioxidants, total phenols as well as flavonoids and inulin compared with untreated plants of either the first or the second harvest. The effect of MeJ surpassed that of SA in inducing contents of the secondary metabolites. Control plants of the second harvest had, generally, higher contents from ascorbic acid, total antioxidants, total phenols total flavonoids and inulin compared with plants of the first harvest. It could be concluded that seedlings’ roots-feeding of the elicitor solution is feasible, easy and cost-effective approach for long-lasting elicitation effect, and that MeJ is superior to SA in eliciting cichory’s bioactive secondary metabolites.    }, keywords = {Cichoriun intybus,Elicitation,methyl jasmonates,Salicylic acid,secondary metabolites}, url = {https://jpp.journals.ekb.eg/article_187442.html}, eprint = {https://jpp.journals.ekb.eg/article_187442_49373dcff8d4fefc50712777bb121aec.pdf} } @article { author = {Ibrahim, Heba}, title = {Effect of Seed Tuber Piece Size and The Number of Eyes on Growth and Yield of Potato (Solanum tuberosum L.) .}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {757-763}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.187444}, abstract = {This research was done to evaluate the growth and yield of potato plants raised from seed tuber pieces (STP) containing one, two, three and four eyes, for ascertaining whether seed tuber pieces containing two eyes will sustain potato growth and yield indifferently from those of larger seed tuber pieces containing more eyes. Results indicated that number of stolons and leaves per plant, leaf area, plant fresh and dry weight, relative growth rate, net assimilation rate, crop growth rate, chlorophyll a, b as well as total chlorophylls, Number of tubers and total tuber yield per plant were decreased with decreasing number of eyes in the STP. However, final emergence percentage and total carotenoids content were not significantly affected. Nevertheless, number of tubers and total tuber yield per plant did not differ significantly neither between whole seed tubers and half seed tubers containing four eyes nor half STP containing three eyes and quarter STP containing two eyes. However, all these parameters were significantly lower in response to single-eye STP compared with those containing two eyes or more. From the economic point of view, cultivation of quarter STP containing two eyes instead of half STP containing four eyes represents 50 % conservation in the seed tubers used for only 13.5 % loss in tubers yield. So, it could be concluded that the gain in net income became substantiated by cultivation of quarter STP containing at least two eyes instead of larger seed tuber pieces, even that represents half of the seed tuber.}, keywords = {Potato, Solanum tuberosum L,Seed tuber piece, size, number of eyes,Growth,yield}, url = {https://jpp.journals.ekb.eg/article_187444.html}, eprint = {https://jpp.journals.ekb.eg/article_187444_2ca382e4be12003372a3b8f022fed211.pdf} } @article { author = {Salem, H. and Gouda, Fatma El-Zahraa and Ali, H.}, title = {Response of Grand Nain Banana Plants to Different Potassium Fertilizer Sources}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {765-772}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.83869.1040}, abstract = {Finding a rich and natural source of potassium nutrient is a major challenge facing banana cultivation. In this study,  four different sources of Potassium: potassium sulphate, slow release (feldspar), bio-fertilizer (yeast & potassin) and potassium thiosulphate were used to evaluate their effects on growth & fruit production of Grand Nain banana cultivar  grown at Luxor Governorate condition, Egypt. The results indicated that using yeast or feldspar alone or in combination as a source of potassium and potassin significantly increased all growth aspects, yield and fruit quality compared to fertilize by potassium sulphate (check treatment); Moreover, there were insignificant differences in these studied traits due to fertilize with yeast, feldspar alone or in combination as well as spraying potassium thiosulphate or potassin. Using yeast or feldspar plus yeast were very effective in enhancing all growth aspects, yield, bunch traits and fruit characteristics compared to untreated ones; So, it is evident from the foregoing result that using feldspar or yeast alone or in combination improved the growth, nutritional status and fruiting of Grand Nain banana plants;. In addition, they are beneficial in organic farming production since they improve the soil structure and fertility; also, reduce the cost of production and environmental pollution.}, keywords = {bio-fertilization,feldspar,fruit quality,Grand Nain banana,potassium,pollution}, url = {https://jpp.journals.ekb.eg/article_188428.html}, eprint = {https://jpp.journals.ekb.eg/article_188428_06a2a9dbb121d4c182ff2bef58910385.pdf} } @article { author = {Razzaky, Esraa and El-Shourbagy, M. and Fouda, E. and Sewelam, N. and Sobhy, Sherien and Abdelkhalek, A. and Saad-Allah, Kh.}, title = {Studying The Responses of Hordeum vulgare Seedlings to Salinity and Osmotic Stresses: Oxidative Stress/Antioxidants Play Crucial Roles}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {773-783}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188605}, abstract = {Salinity and osmotic stresses are prime reasons of plant growth and productivity reduction in semi-arid regions and cause complex series of physiological, cellular, and molecular changes. Since osmotic and ionic effects are correlated and initiated by salinity, separating both is an important step in understanding the basis of salt tolerance. Barely seedlings(cultivar Giza 134)were treated with either NaCl(150 mM)or iso-osmotic polyethylene glycol 6000 (19.5% PEG). Treatments were applied two times before sampling and collected after two weeks from emergence. Results showed decreasing of fresh matter in treated seedlings, especially those treated with PEG. Furthermore, significant increase of non-enzymatic antioxidants, oxidative markers in addition to enzymatic antioxidants examined (peroxidase (POX), and polyphenol oxidase (PPO)) was detected with PEG treatment. The osmoregulators including proline (Pro) and glycine betaine(GB) increased in the root tissue, in conjunction with enhancement in the antioxidant status of leaves by applying PEG. Based on molecular analysis using real-time RT-PCR, HvNHX gene (coding for Na+/H+ antiporter) was highly expressed after 48 h from treatment in the roots under salinity, but it was expressed in PEG-treated leaves rather than salt-treated ones, and the opposite was true for HvGORK gene (regulate voltage-gated K+-permeable channels).On the other hand, HvDREB gene(coding for dehydration responsive element binding protein)has recorded higher expression in the roots under PEG treatment compared to control. Taken together, the current study suggests that the studied barley cultivar possesses higher tolerance to salt stress than osmotic stress imposed by PEG, so it could be more suitable for cultivation under salinity conditions.}, keywords = {barely,PEG,salinity,Osmotic stress,Oxidative markers,antioxidants,Gene expression}, url = {https://jpp.journals.ekb.eg/article_188605.html}, eprint = {https://jpp.journals.ekb.eg/article_188605_33293f8e52e65d90cd6b04ca0bf86b01.pdf} } @article { author = {Ramadan, E. and Mazal, Tahany and Sakran, Raghda}, title = {Evaluation of some Rice Genotypes (Oryza sativa L.) Under Normal and Heat Stress Conditions}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {785-794}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.188608}, abstract = {The aim of the current study was to evaluate 25 rice genotypes under normal at Sakha, Kafr El-Sheikh, Egypt and under heat stress conditions at New Valley, Egypt during two rice growing seasons of 2017 and 2018. Data were collected on eight traits i.e., flag leaf area, flag leaf angle, plant height, panicle length, panicles plant-1, 1000-grain weight, fertility percentage and grain yield plant-1. High amount of genetic variation was found among the studied genotypes under normal and heat stress conditions. All studied genotypes were negatively affected by high temperature. The most affected traits by heat stress were fertility percentage, grain yield plant-1, flag leaf area and panicles plant-1 with average reductions of 73.59, 64.22, 42.46 and 41.31%, respectively. Correlation and path coefficient analysis showed that number of panicles plant-1 and fertility percentage were good indicators for grain yield under heat stress condition. Based on the HSI values of grain yield plant-1 and fertility percentage, both genotypes N22 and Giza178 could be identified as heat tolerant (HSI value was ≤0.5 for both traits). Based on the results of PCA analysis, the most desirable genotypes under heat stress were Giza178, N22, Bala, Dular, WAB56-104, Sakha104 and Egyptian Yasmin. According to the current investigation, it could be concluded that those eight genotypes could be used in breeding programs as donors for developing high yielding heat tolerant promising lines. In addition, Egyptian rice varieties; Giza178, Sakha104 and Egyptian Yasmin are suitable for cultivating under both normal and heat stress conditions in Egypt.}, keywords = {rice,heat stress,correlation coefficient,path analysis,HSI and PCA}, url = {https://jpp.journals.ekb.eg/article_188608.html}, eprint = {https://jpp.journals.ekb.eg/article_188608_2471001c3ea9e653239ff686f3ea3d32.pdf} } @article { author = {hussein, fatma and Sakran, Raghda and Elshenawy, M.}, title = {Evaluation of New Promising Rice Lines Under Water Deficit Conditions Based on Grain Yield, Quality and Stress Tolerance Indices}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {795-804}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.84186.1042}, abstract = {Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station during 2019 and 2020 growing seasons, to evaluate 21 rice genotypes (18 new promising lines and three commercial check varieties) for grain yield, yield components and quality characters under normal and water deficit conditions. Moreover, eight stress tolerance indices were calculated based on grain yield under water deficit and normal conditions to differentiate the water deficit tolerant genotypes from sensitive ones. The results showed that the variances due to years, environments, genotypes and their interactions were significant for most studied traits. All mean values of the studied traits decreased under water deficit stress condition compared to those under normal condition. The earliest genotypes were L4, L15 and L12 under normal condition. Whereas under stress condition L11,Giza 179 and Sakha 107 were the earliest ones. The most desirable mean values towards dwarfness were recorded by the lines L1 and L9. While, L13 and L2 had the highest mean values towards tallness. Moreover, Line 2 recorded the most desirable estimates for grain quality characters across all environments. The lines L14, L12 and L3 gave the highest grain yield and stress tolerance index (STI), while L6 displayed the lowest grain yield and STI. Moreover, the results indicated that harmonic mean (HM) and yield index (YI) indices gave similar ranks for these lines which considered as water deficit tolerant genotypes. Accordingly, these lines could be used in breeding programs to transmit tolerance genes to commercial cultivars for reduced irrigation.}, keywords = {rice,Promising lines,Water deficit,grain quality,Stress tolerance indices}, url = {https://jpp.journals.ekb.eg/article_188610.html}, eprint = {https://jpp.journals.ekb.eg/article_188610_584cedd30c9e498598188962ede89950.pdf} } @article { author = {Samy, Mahmoud and M. El-Zohiri, S.}, title = {Improving Seed Productivity of Garlic By Using Nitrogen, Potassium Fertilization and Some Growth Regulators}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {805-812}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.83485.1039}, abstract = {Two field experiments were conducted under Egyptian conditions at Kaha Vegetables Research Farm, Horticulture Research Institute, Agriculture Research Centre to study the effect of the high nitrogen and potassium levels and two growth regulators, Cytokinin at 2.5 ppm and Gibberellic Acid (GA3) at 100 ppm on the growth and seed yield of garlic (Allium sativum L.) cv. Sids 40. The obtained results showed that increasing nitrogen and potassium fertilizer up to 150 % NK. of the recommended rate (120 kg N + 72 kg K2O fed-1),  significantly improved most studied growth traits (plant length, number of leaves, leaf area, total fresh weight, total plant dry weight), bulb characters, chemical constituents, yield, and yield components. Moreover, 150 % NK combined with GA3 + CPPU foliar spraying resulted in the highest average bulb weight, average glove weight and bulb. The obtained results confirm that garlic seed yield could be improve by N, K nutrition and foliar application of GA3 and CPPU.}, keywords = {Garlic seed,nitrogen,potassium,gibberellic acid,Cytokinin,yield,bulb yield,bulb quality}, url = {https://jpp.journals.ekb.eg/article_188613.html}, eprint = {https://jpp.journals.ekb.eg/article_188613_78934833c0bd9e71f61519428e810565.pdf} } @article { author = {Arab, S. and Mohamed, Mohamed and El-Shal, M.}, title = {Identifying Wheat Stress Tolerant Genotypes Among Some Bread Wheat Accessions Using Different Drought Tolerance Indices}, journal = {Journal of Plant Production}, volume = {12}, number = {7}, pages = {813-818}, year = {2021}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2021.84334.1043}, abstract = {Thirty-nine genotypes of bread wheat (Triticum aestivum L.) collected from different regions in Egypt and two commercial varieties were used in this study, to estimate the tolerance indices and to establish the drought tolerance in 41 genotypes. Significant genotypes mean squares were detected for all studied traits, except number of spikes per m2 and grain per spike under water stress. Using stress susceptibility index (SSI), genotypes 4, 6, 1, 31, 19, and 24 were classified as highly drought tolerant. According to stress tolerance index (STI), twelve genotypes were the top performer under stressed conditions. Twenty-nine genotypes showed lowest STI values (< 0.10) which implies that these genotypes were highly susceptible to drought. The greater values of yield stability index (YSI) were observed in genotypes 8,39,17,22,28,12,26 and 37. Based on sensitivity drought index (SDI) the six genotypes 4,6,1,31,19 and 24 revealed the highest values and were identified as tolerant under stress conditions. According to drought index (DI). Grain yield under stressed conditions (YS) was significantly and positively correlated with STI and DI. Yield in non-stress condition (YP) was significantly and positively correlated with YS, SSI, STI, SDI, and DI and negatively correlated with YSI. The total variation expressed between the two components was 99.70%. The variable that has the highest PCA1 value and the lowest PC2 was found excellent in screening genotypes under stress and non-stress conditions. Also, genotypes 17 and 37 are the most tolerant genotypes under water stress.}, keywords = {}, url = {https://jpp.journals.ekb.eg/article_188614.html}, eprint = {https://jpp.journals.ekb.eg/article_188614_9f7434e348fd57ea42a9be9fe818bff1.pdf} }