Davinderdeep Kaur, Pallavi Mansotra, Poonam Sharma and Sunita Sharma
Symbiotic nitrogen fixation (SNF) is a mutualistic interaction between host plant and the root nodule bacteria. The present investigation was carried out to study symbiotic effectiveness of potential Bradyrhizobium (slow growing; IND1, LSBR3, PANT1, SB271, & DS1) / Ensifer (fast growing; IND2, LSER7, LSER8 & PANT2) strains over uninoculated control on growth and yield in soybean [Glycine max (L.)]. In-vitro thin layer chromatographic (TLC) analysis revealed significantly high amount of flavonoid like compounds from roots of soybean seeds bacterized with LSBR3 (3.44 μg/ml) as compared to control treatment (2.60 μg/ml). Field evaluation of potential rhizobia presented significantly higher germination and plant height with Ensifer strains, LSER8 (94.7% and 36.8 cm), LSER 7 (93.4% and 36.4 cm) and Bradyrhizobium strain LSBR3 (91.5% and 35.6 cm), respectively. Overall microbial activity assayed by dehydrogenase activity was significantly higher for LSBR3 (17.54 μg/TPF/g/soil/h) and LSER7 (16.75 μg/TPF/g/soil/h) at 90 DAS as compared to other treatments. Nodulation significantly enhanced with LSER8 and LSER7 (ranged from 52.2 to 135.7 and 49.9 to 128.7 mg/plant, respectively) treatments over un-inoculated control. Maximum leghaemoglobin and nitrogen content (5.52 mg/g fresh weight of nodules and 2.89 %, respectively) analyzed with LSBR3. Grain yield recorded was significantly higher with LSBR3 (12.3%) followed by PANT1 (12 %) and LSER8 (11.7%) over control and emerged as effective strains for improving growth, SNF and yield in soybean and can be exploited as commercial inoculants of soybean
English 
Spanish 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi