INDUCTION OF RESISTANCE IN PEANUT PLANTS AGAINST ROOT ROT DISEASES UNDER GREENHOUSE CONDITIONS BY SOME CHEMICAL INDUCERS | ||
| Journal of Plant Production | ||
| Article 15, Volume 31, Issue 6, June 2006, Pages 3511-3524 PDF (3.95 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2006.236041 | ||
| Authors | ||
| E. Y. Mahmoud,1; Samia Y.M. Shokri2; Zeinab N. Hussin1 | ||
| 1Plant Pathology Res. Ins., Agric. Res. Center, Giza., Egypt | ||
| 2Institute of African Res. and Studies, Cairo Univ., Cairo, Egypt | ||
| Abstract | ||
| The effectiveness of three chemical inducers resistance, hydrogen peroxide (H202) at 0.25, 0.5 and 1%, Bion (benzo 1,2,3)thiodiazole-7- carbothioic- methlye ester) and salicylic acid at 2, 4 and 8 mM were tested in greenhouse under artificial inoculations. all tested inducers significantly reduced damping-off, wilt and root rot incidence, Salicylic acid at 4 mM and Bion at 8 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 up to 4 mM and hydrogen peroxide up to 0.25 % led to a decrease in their effect on reducing the disease incidence. While the effect of Bion on reducing of diseases incidence increased with increasing of their concentration. This study indicated that, there is a correlation between induced resistance and some biochemical changes in roots tissues like increased the activity of oxidative enzymes (peroxidase and polyphenoloxidase) and accumulation of phenol compounds. Salicylic acid at 4 mM followed by Hydrogen peroxidase at 0.25% and Bion at 8 mM recorded the highest content of phenol compounds and highest increase of activity of oxidative enzymes (peroxidase and polyphenoloxidase) in roots of peanut plants. | ||
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