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Biochemical changes associated with induced resistance of peanut root and pod rots diseases [electronic resource].

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Mahmoud, E. Y

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Language: English Summary language: Arabic Description: p.1237-1253Other title:

التغيرات البيوكيميائية المصاحبة للمقاومة المستحثة لأمراض أعفان جذور وقرون الفول السودانى [Added title page title]

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Minufiya journal of agricultural research, 2014 V. 39 (4) Part 1 [electronic resource].

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In: Minufiya journal of agricultural research 2014.v.39(4)P 1Summary: Under greenhouse and field conditions all tested inducers significantly reduced peanut cv. Giza 6 damping-off, root and pod rot incidence. In this respect salicylic acid at 4 mM followed by hydrogen peroxide at 0.25% gave the highest effect on all parameters of disease incidence and consequently increasing percentage of healthy survival plants. Increasing concentration of salicylic acid than 4 mM and hydrogen peroxide than 0.25 % led to a decrease in their effect on reducing the disease incidence. While, the effect of bion on reducing diseases incidence was increased with increasing their concentrations. Results also stated that, there is a correlation between induced resistance and some biochemical changes in root tissues as increasing the activity of oxidative enzymes (catalase, peroxidase and polyphenoloxidase) and accumulation of phenol compounds. Salicylic acid at 4 mM followed by bion at 8 mM. recorded the highest content of phenol compounds while, the highest increase of activity of oxidative enzymes (catalase, peroxidase and polyphenoloxidase) in peanut roots was recorded with salicylic acid at 4 mM and hydrogen peroxide at 0.25 %.

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Under greenhouse and field conditions all tested inducers significantly reduced peanut cv. Giza 6 damping-off, root and pod rot incidence. In this respect salicylic acid at 4 mM followed by hydrogen peroxide at 0.25% gave the highest effect on all parameters of disease incidence and consequently increasing percentage of healthy survival plants. Increasing concentration of salicylic acid than 4 mM and hydrogen peroxide than 0.25 % led to a decrease in their effect on reducing the disease incidence. While, the effect of bion on reducing diseases incidence was increased with increasing their concentrations. Results also stated that, there is a correlation between induced resistance and some biochemical changes in root tissues as increasing the activity of oxidative enzymes (catalase, peroxidase and polyphenoloxidase) and accumulation of phenol compounds. Salicylic acid at 4 mM followed by bion at 8 mM. recorded the highest content of phenol compounds while, the highest increase of activity of oxidative enzymes (catalase, peroxidase and polyphenoloxidase) in peanut roots was recorded with salicylic acid at 4 mM and hydrogen peroxide at 0.25 %.

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