86 / 2021-06-30 20:27:14

Biocompost with halotolerant bacterial consortium mitigated the adverse effects of salt stress on Tomato (Solanum lycopersicum) by shifting rhizospheric bacterial communities

Biocompost,Halotolerant bacteria,Tomato,Salt stress,Rhizospheric bacterial community

 The situation of global soil degradation is aggravating, in which the continuous increase of soil salt content has brought serious damage to agricultural production. Using halotolerant microorganisms to improve saline soil and promote plant growth is one of the effective ways to solve the problem of saline soil. The effect of biocompost with halotolerant bacterial consortium mitigated on salt stress resistance of tomato seedlings was studied, and the mechanism was elucidated in cooperation with rhizosphere microbial ecology. The results showed that biocompost with halotolerant bacterial consortium mitigated could promote the growth of tomato under 0.4% NaCl stress and help tomato resist salt stress. The root activity of the biocompost with halotolerant bacterial consortium mitigated treatment group was significantly increased, and the Biocomposts1 increased by 40.6%. The accumulation of malondialdehyde (MDA) in tomato leaves under salt stress was reduced, and the activities of antioxidant enzymes (SOD, POD, CAT) were significantly increased. Sphingomonas, Arthrobacter and Massilia were significantly enriched in the rhizosphere of tomato under halotolerant microbial enhanced composting, or were related to the improvement of salt tolerance of tomato.