A comparative study of Effect of Rhizobacteria onto seedling vigour of groundnut in in-vitro condition isolated from Kuttch region

Abstract

Some high salt tolerant Plant Growth Promoting bacteria(BM6, AMAAS57, AMAAS357, R29 and R5) were isolated from Gujarat kuttch region. Their PGP characters were characterized at lab by different biochemical test. To study their ability to promote growth of plant in vitro bioassay of the selected isolates was done. The bioassay was done with groundnut seedling under 2 ds/m, 4ds/m and 6ds/m salt stressed condition. Different growth parameters of groundnut seedling were measured after 7 days growth. Statistical analysis of the experimental data was done following the SPSS package. The results revealed that primary root length was improved significantly over uninoculated control when the seedlings were inoculated with Enterobacter sp. R29. However, treatment of seedlings with other rhizobacteria did not influence the primary root growth except with Pseudomonas aeruginosa AMAAS57 wherein the primary root growth was reduced significantly. The econdary root length was improved significantly when inoculated with Pseudomonas sp. AMAAS357, Pseudomonas aeruginosa BM6 and Enterobacter sp. R29 without salinity stress. However, the number of secondary root was improved significantly only when seedlings were treated with Enterobacter sp. R29 and fresh weight of the seedlings was improved significantly only when inoculated with Pseudomonas sp. AMAAS357.