Indian Journal of Agricultural Research

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Indian Journal of Agricultural Research, volume 52 issue 6 (december 2018) : 596-603

Isolation and characterization of plant growth promoting endophytic bacteria isolated from Vigna radiata

Namita Bhutani, Rajat Maheshwari, Pooja Suneja
1Department of Microbiology, Maharshi Dayanand University, Rohtak-124 001, Haryana, India.
Cite article:- Bhutani Namita, Maheshwari Rajat, Suneja Pooja (2018). Isolation and characterization of plant growth promoting endophytic bacteria isolated from Vigna radiata. Indian Journal of Agricultural Research. 52(6): 596-603. doi: 10.18805/IJARe.A-5047.
A total of 22 endophytic bacteria were isolated from roots and nodules of Vigna radiata (mungbean) obtained from Jind district, Haryana. These were characterized on the basis of plant growth promoting traits. Almost all the endophytic bacteria produced IAA with maximum production of 81.63µg/ml by isolate MJiR8. Among these, 100% root isolates and 84.6% nodule isolates resulted in in vitro root growth promotion of mungbean seedlings. All the isolates produced ammonia; eighteen (all root and nine nodule isolates) produced organic acid while only four root isolates were positive for siderophore production. The four isolates produced hydrogen cyanide and out of these only MJiR9 inhibited the growth of fungal pathogens Fusarium oxysporium and Aspergillus niger. All the endophytes were used to determine molecular diversity by ARDRA (Amplified Ribosomal DNA Restriction Analysis) Results revealed that the nodule isolates were more diverse, being present in separate clusters, in comparison to root isolates which were grouped together in cluster III.
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