تأثير الرش ببيروكسيد الهيدروجين H2O2 في نمو بادرات الباقلاء Vicia faba واستحثاث مقاومتها ضد الفطر Aspergillus niger

Abstract

This study was accrue in one of nurseries concerning production fruits in Najaf to test the capability of Hydrogen peroxide (H2O2) in inducing the growth of Vicia faba seedling and it resistance against the Aspergillus niger fungi, during the period from 15/ 10/ 2009 to 1/ 12/2009.after 15 days of sowing , seedlings were aspersed by hydrogen peroxide solutions in the concentration (0 , % 0.25 , % 0.5 , %1). The results indicated many positive effects for the use of H2O2 on seedling growth compared with the control . H2O2 caused significantly increase in : plant high , number of branches , number of leaves, leaf area and shoot fresh weight, compared with control.(%0.25) concentration of H2O2 give the highest average of high of seedling ( 20.96cm ) , number of branches ( 3.33 ), number of leaves(10.8), leaf area(14.92cm2) and shoot fresh weight ( 4.972 ).On the other hand, H2O2 caused significantly decrease in leaves chlorophyll content and shoot dry weight of seedling treated with the different concentration of H2O2 compared with control. Then seedlings were aspersed by suspension fungal solution, and the results indicated the positive effect for the use of H2O2 in decreasing of seedling infection by Aspergillus niger . (%0.25) concentration of H2O2 give the highest decreasing in percentage of infected leaves (%18.51) , Disease severity (29.08), fungal colony diameter (5.3), and colony area (8.32)cm2 .This study indicated that Hydrogen peroxide is affective in Vicia faba seedling growth and it resistance against Aspergillus niger fungi.