European Journal of Biotechnology and Bioscience

Authors
Ramkrishna Saha, Bidisha Mondal

Abstract
Variation in mycorrhizal responsiveness is a significant trait of some plants. Rice having wide genetic variability was selected to study the factors affecting mycorrhizal dependency. AMF inoculation effects of eight rice varieties were studied for plant growth at 15 and 30 days with low nutrient laterite soil. The fast growing HYV having higher nutrient demand with less inherent supply efficiency showed positive response to AMF presence at both early and later growth stages where as slow growing land race varieties having less nutrient demand with higher supply efficiency responded negatively at early stage with a marginally non-significant positive response for both shoot and root growth at later age. The key determinant of responsiveness to mycorrhizal inoculation is the physiological traits like growth rate and/or nutrient supply-demand efficiency and that response may change during the progress of age of plants. Variety Dular, although a traditional land race falls intermediate between the two variety groups.