Diversity Status of Beneficial Microflora in Saline Soils of Tamil Nadu and Pudhucherry in Southern India
نویسنده
چکیده
Alleviating plant salt stress and remediating saline soils are of great economic interest. Beneficial microbes such as Arbuscular Mycorrhizal (AM) fungi, Plant Growth Promoting Rhizobacteria (PGPRs), etc. are associated with many plants including trees. These beneficial microbes can cope up with salinity and help the plants to survive in such soils. In this study, diversity status of beneficial microflora from the samples collected from different salt affected areas in Tamil Nadu and Pudhucherry, South India was investigated. Total of 51 PGPR isolates (Phosphate Solubilizing Bacteria-18; Azotobacter spp.-16 and Azospirillum spp.-17) and 25 different AM fungi were made. Screened efficient PGPR isolates for plant growth hormone (IAA) production and phosphate solubilization under in vitro. Highest amount of IAA was produced by Azospirillum lipoferum (74 μg/mL) and Azotobacter chroococcum (36 μg/mL). Phosphate solubilizing bacterial isolates showed a high rate of phosphate solubilization efficiency (SE) with Bacillus megaterium indicating a SE of 140% and Bacillus subtilis, a SE of 120%, making both the isolates as strong phosphate solubilizers.
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