عنوان البحث(Papers / Research Title)
Effect of environmental condition on antagonism between Trichoderma harzianum Rifai and Rhizoctonia
الناشر \ المحرر \ الكاتب (Author / Editor / Publisher)
جواد كاظم عبود الجنابي
Citation Information
جواد,كاظم,عبود,الجنابي ,Effect of environmental condition on antagonism between Trichoderma harzianum Rifai and Rhizoctonia , Time 6/13/2011 9:22:06 PM : كلية العلوم
وصف الابستركت (Abstract)
A series of laboratory experiments were conducted to study the effect of environmental
الوصف الكامل (Full Abstract)
Effect of environmental condition on antagonism between Trichoderma harzianumRifai and Rhizoctonia solani KuhnZena Hadi Obead Jawad K. Abood Rebab OmranDepartment of Biology Babylon University
AbstractA series of laboratory experiments were conducted to study the effect of environmental parameters (temp. and pH) on the antagonism process between bio-control agent, Trichoderma harzianum Rifai and fungal pathogen, Rhizoctonia solani Kuhn. In particular on growth and antagonist activity of both fungi at different levels of temp. (15,25, 35 0C) and pH (4,6,8) along 7 days. The results revealed increasing the growth of R. solani at 25 and 35 0C, and reduced at 150Cthrough all levels of pH. In contrast, the growth of T. harzianum was increased significantly at 25 0C, compared with that at 15 and 350Cwhen using 6 and 8 pH.Successive development of T. harzianum varied with different levels of Temp. and pH and that could reflected its antagonist activity, as more inhibition to the growth of fungal pathogen was obtained at pH 4 for all ranges of temp. used in this experiment in comparison with that at pH 6.Microscopic photographs for antagonism process showed the twisting of T. harzianum mycelium around the mycelium of R. solani were coincided with collapsing and malformation of R. solani cell walls which possibly resulted from enzymatic secretion by bio-agent fungal eg. Chitinase and protease.
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