| Title | Two Rhizobacterial Strains, Individually and in Interactions with Rhizobium sp., Enhance Fusarial Wilt Control, Growth, and Yield in Pigeon Pea |
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| Author | Swarnalee Dutta1, Pranjal Morang2, Nishanth Kumar S3, and B.S. Dileep Kumar3* |
| Address | 1Amity Institute of Biotechnology, Amity University Haryana,Gurgaon (Manesar), Haryana 122 413, India, 2Department of Ecology and Environmental Science, Assam University, Silchar 788 011, Assam, India, 3Agroprocessing and Natural Products Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific and Industrial Research (CSIR), Thiruvanathapuram 695 019, Kerala, India |
| Bibliography | Journal of Microbiology, 52(9),778–784, 2014, |
| DOI | 10.1007/s12275-014-3496-3 |
| Key Words | fusarial wilt control, nodulation, pigeon pea, PGPR, Rhizobium, volatile compounds |
| Abstract | A Pseudomonas aeruginosa strain, RRLJ 04, and a Bacillus cereus strain, BS 03, were tested both individually and in combination with a Rhizobium strain, RH 2, for their ability to enhance plant growth and nodulation in pigeon pea (Cajanus cajan L.) under gnotobiotic, greenhouse and field conditions. Both of the rhizobacterial strains exhibited a positive effect on growth in terms of shoot height, root length, fresh and dry weight, nodulation and yield over the non-treated control. Co-inoculation of seeds with these strains and Rhizobium RH 2 also reduced the number of wilted plants, when grown in soil infested with Fusarium udum. Gnotobiotic studies confirmed that the suppression of wilt disease was due to the presence of the respective PGPR strains. Seed bacterization with drug-marked mutants of RRLJ 04 and BS 03 confirmed their ability to colonize and multiply along the roots. The results suggest that co-inoculation of these strains with Rhizobium strain RH 2 can be further exploited for enhanced growth, nodulation and yield in addition to control of fusarial wilt in pigeon pea. |