Author(s):

Yogendra Singh Gusain, CM Mehta, IP Sharma and AK Sharma

Abstract: The effects of the inoculation of plant growth promoting rhizobacterial (PGPR) strains Pseudomonas fluorescence strain P2, Pseudomonas jessenii R62, Pseudomonas synxantha R81, Pseudomonas koreensis strainYB1 and Arthrobacter nitroguajacolicus strain YB3 on CSR-36 (Salinity tolerance) and IR-64 (Salinity sensitive) genotypes of rice were studied under three level of saline alkali soil stress. The Level I have 9.18 pH and 2.05 ds/m Electrical conductivity (Ec), the Level II have 9.38 pH and 2.47 ds/m Ec, while the Level III have 9.63pH and 3.05 ds/m Ec. PGPRs, Pseudomonas jessenii, R62, Pseudomonas synxantha, R81 were used as a consortium. Most of the inoculated plants had remarkably higher plant height, fresh weight, chlorophyll, carotenoid content, lowered electrolyte leakage (EL) and Malondialdehyde (MDA) content as compare to uninoculated plants in all the level of stress. The PGPRs efficiently reduced the proline and superoxide dismutase (SOD) activity in both the genotype of rice plants as compare to their respective control. Majority of the inoculated plants had remarkably higher, Phosphorus, potassium ion uptake and lowered sodium ion uptake in shoot as compare to non inoculated plants. In this respect the selected PGPRs helped to reduce the saline alkali soil stress in plants. In overall stress level irrespective of treatments salt sensitive IR-64 showed higher level of EL, MDA content, Phosphorus uptake, sodium uptake and SOD activity as compare to salt tolerant CSR-36.

Pages: 3312-3319  |  890 Views  201 Downloads

Download (1200KB)