Effect of Different Herbicides on the Nodulation Property of Rhizobial Isolates
Journal Title: Universal Journal of Environmental Research and Technology - Year 2012, Vol 2, Issue 4
Abstract
The soil bacteria Rhizobium species in association with leguminous plants play vital role in agriculture. The amount of nitrogen (N) supplied by fixation depends on the ability of the inoculant rhizobia to fix nitrogen and also on the ability of the plant to provide energy to the rhizobia in the nodules. Many factors that influence either the rhizobia directly or the ability of the plant to send energy to the nodules have a negative impact on nitrogen fixation and ultimately, crop yield. Application of pesticides both in crop and soil is known to affect plant growth and microbial activity. Attempt was made to isolate Rhizobia from the roots of wild legumes and studying their nodulation property in presence of most commonly used herbicides. Three herbicides namely 2,4 D amine salt, Round Up & Atrazine were used for this experiment. We found as the herbicide conc. is increased from below MIC,MIC level and Above MIC level, the shoot length of plants, dry wt. of plant shoot, total root nodule number of plants and dry wt. of nodules was decreased. There was no development of nodules on side root system of plants and the decreased vigor in plants was observed.
Authors and Affiliations
Patil Vishwas Shankar, Shaikh N. R. and Patil Sharmishtha Vishwas
Keywords
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