Ismail ., F., Abd El-Nabi, H. (2006). EFFECT OF SOME ANTIOXIDANTS ON THE INCIDENCE 0F DAMPING-OFF, ROOT HOT, WILT, YIELD AND YIELD ATI'RIBUTES IN SESAME. (Sesamum indicum. L). Journal of Plant Production, 31(10), 6155-6171. doi: 10.21608/jpp.2006.236332
F. M. Ismail .; Heba M. Abd El-Nabi. "EFFECT OF SOME ANTIOXIDANTS ON THE INCIDENCE 0F DAMPING-OFF, ROOT HOT, WILT, YIELD AND YIELD ATI'RIBUTES IN SESAME. (Sesamum indicum. L)". Journal of Plant Production, 31, 10, 2006, 6155-6171. doi: 10.21608/jpp.2006.236332
Ismail ., F., Abd El-Nabi, H. (2006). 'EFFECT OF SOME ANTIOXIDANTS ON THE INCIDENCE 0F DAMPING-OFF, ROOT HOT, WILT, YIELD AND YIELD ATI'RIBUTES IN SESAME. (Sesamum indicum. L)', Journal of Plant Production, 31(10), pp. 6155-6171. doi: 10.21608/jpp.2006.236332
Ismail ., F., Abd El-Nabi, H. EFFECT OF SOME ANTIOXIDANTS ON THE INCIDENCE 0F DAMPING-OFF, ROOT HOT, WILT, YIELD AND YIELD ATI'RIBUTES IN SESAME. (Sesamum indicum. L). Journal of Plant Production, 2006; 31(10): 6155-6171. doi: 10.21608/jpp.2006.236332
EFFECT OF SOME ANTIOXIDANTS ON THE INCIDENCE 0F DAMPING-OFF, ROOT HOT, WILT, YIELD AND YIELD ATI'RIBUTES IN SESAME. (Sesamum indicum. L)
1Oil Crops Res Sect, Field Crops Res Inst, A.R.C, Giza, Egypt.
2Plant PathoIOQy,Depart, Facullty of Agriculture Suez Canal University.
Abstract
Effect of four antioxidants namely Di-potassium hydrogen orthophosphate
(KaHPox). Aspirin (acetyle salicylic acid) ASA, Tartaric acid and Citric acid on
damping- off, root rot, wilt and yield and it's attributes in sesame plants was
investigated. Isolation trails from infected seedlings and plants showing symptoms of
damping-oft. root rot, charcoal rot and wilt diseases yielded six soilborne fungi which
were identified as Macrophomina phaseoiina (Tassi) Goid, Fusan'urn oxysporum
(Schiecht.) f. sp sesami' Jacz, F. solanr' (Mart.)8acc, Rhizoctonia soianr' (Kuhn),
Sclerotium roffssr'i (Secs). and Phytophthora parasitica Desi. The first two fungi were
the most frequently isolated ones (35.3% and 22.4%), while P. parasitica was the
least (6.4%). Linear growth values of M. phaseolina and F. oxysporum f. sp sesamr‘
were significantly reduced with specific rates of the tested antioxdants. All antioxidants
showed less significant reduction in the growth of both fungi than control. The best
reduction values of linear growth were obtained with Tartaric acid followed by Citric
acid at 10 mM concentrations.
Moreover. effect of the used antioxidants on pre -and post-emergence
damping-off, charcoal rot, wilt, yield and yield attributes under greenhouse and field
conditions during two successive growing seasons 2004 and 2005 at lsmailia
Agricultural Research Station was tested. Six treatments for application methods were
tested against disease incidence, yield and yield attributes under field conditions.
Tartaric acid at 10 mM concentration was superior in minimizing disease incidence
followed by Citric acid 10 mM, while Aspirin at 5 mM showed the lowest effect on the
disease incidence. Among other antioxidants, KgHPos was the most effective on yield
and yield attributes. The best treatment, viz. treatment of sesame seeds with seed
dressing in the antioxidants and spraying the plants after one and two months from
sowing also (83) was superior in minimizing diseases incidence and gave the highest
values for number of capsules/plant, seed yield/plant and 1000-seed weight as the
result of the interactions.
Seed yieldffed was positive and highly correlated with the studied characters
except oil percentage. Sesame seeds treated with any of the tested antioxidants
increased peroxidase activity. The highest activity was obtained from plants grown
from seeds previously treated with Tartaric acid followed by Citric acid at 10 mM
concentration.
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