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Functional activity of endophytic bacteria G9H01 with high salt tolerance and anti-Magnaporthe oryzae that isolated from saline-alkali-tolerant rice
Science of the Total Environment ( IF 9.8 ) Pub Date : 2024-03-21 , DOI: 10.1016/j.scitotenv.2024.171822 Zhishan Wang , Ni Li , Youqiang Xu , Weiping Wang , Yang Liu
Science of the Total Environment ( IF 9.8 ) Pub Date : 2024-03-21 , DOI: 10.1016/j.scitotenv.2024.171822 Zhishan Wang , Ni Li , Youqiang Xu , Weiping Wang , Yang Liu
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It holds significant practical importance to screen and investigate endophytic bacteria with salt-tolerant activity in rice for the development of relevant microbial agents. A total of 179 strains of endophytic bacteria were isolated from 24 samples of salt-tolerant rice seeds, with almost 95 % of these bacteria exhibiting tolerance to a salt content of 2 % (0.34 mol/L). Following the screening process, a bacterium named G9H01 was identified, which demonstrated a salt tolerance of up to 15 % (2.57 mol/L) and resistance to , the causal agent of rice blast disease. Phylogenetic analysis confirmed G9H01 as a strain of . The complete genome of G9H01 was sequenced and assembled, revealing a considerable number of genes encoding proteins associated with salt tolerance. Further analysis indicated that G9H01 may alleviate salt stress in a high-salt environment through various mechanisms. These mechanisms include the utilization of proteins such as K transporters, antiporters, and Na/H antiporters, which are involved in K absorption and Na excretion. G9H01 also demonstrated the ability to uptake and accumulate betaine, as well as secrete extracellular polysaccharides. Collectively, these findings suggest that G9H01 has potential as a biocontrol agent, capable of promoting rice growth under saline-alkali-tolerant conditions.
更新日期：2024-03-21
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