Evaluation of the Plant Growth Promoting Potential of Endophytic Bacteria Isolated from Vigna radiata (L)

Vigna radiata (Mung bean) is one of the major pulse crop cultivated in Madhya Pradesh.Endophytic bacteria are endosymbiotic and offer benefits to host plant.A total of 25 endophytic bacteria were isolated from roots nodules of Vigna radiata from Misrod District Bhopal, M.P during summer season.These were assessed for plant growth promoting traits.Among all the endophytes 72% of the isolates were positive for IAA ptoduction ranging from 1.02-44.24μg/ml.Siderophore production ranged between 0.09 to 5.22 mg/ml with 60% of the isolates as positive.36% of the bacterial endophytes were positive for Phosphate solubilisation and ammonia production.ACC deaminase activity and HCN production was observed by 52 % of the isolates.32% of the endophytes showed antagonistic activity against the fungal pathogens.Isolate VRN 7, VRN10 and VRN 15 showed antagonistic activity against all the tested fungal pathogens.The bacterial endophytes possessed multiple growth promoting traits along with resistance to varying temperature, pH and salinity conditions thus ideal for use in field for desired yield.