Cai Deyu, Xu Ying, Zhao Fei, Zhang Yan, Duan Huirong, Guo Xiaonong
Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.
College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China.
PeerJ. 2021 Jan 13;9:e10702. doi: 10.7717/peerj.10702. eCollection 2021.
Plant-growth-promoting rhizobacteria (PGPR) can promote plant growth and enhance plant tolerance to salt stress. sp. strain M30-35 might confer abiotic stress tolerance to its host plants. We evaluated the effects of M30-35 inoculation on the growth and metabolite accumulation of Willd. during salt stress growth conditions.
The effects of M30-35 on the growth of seedlings were tested under salt stress. Seedling growth parameters measured included chlorophyll content, root activity, levels of plant- phosphorus (P), and saponin content.
M30-35 increased biomass production and root activity compared to non-inoculated plants fertilized with rhizobia and plants grown under severe salt stress conditions. The photosynthetic pigment content of chlorophyll a and b were higher in M30-35-inoculated seedlings under high salt stress conditions compared to non-inoculated seedlings. The stability of P content was also maintained. The content of saponin, an important secondary metabolite in , was increased by the inoculation of M30-35 under 300 mM NaCl conditions.
Inoculation of M30-35 rescues the growth diminution of seedlings under salt stress.
植物促生根际细菌（PGPR）可促进植物生长并增强植物对盐胁迫的耐受性。 sp. 菌株M30 - 35可能赋予其宿主植物非生物胁迫耐受性。我们评估了接种M30 - 35对盐胁迫生长条件下 Willd. 生长和代谢产物积累的影响。
在盐胁迫下测试M30 - 35对 幼苗生长的影响。测量的幼苗生长参数包括叶绿素含量、根系活力、植物磷（P）水平和皂苷含量。
与接种根瘤菌的未接种植物和在严重盐胁迫条件下生长的植物相比，M30 - 35增加了生物量产量和根系活力。在高盐胁迫条件下，接种M30 - 35的 幼苗中叶绿素a和b的光合色素含量高于未接种的幼苗。磷含量的稳定性也得以维持。在300 mM NaCl条件下，接种M30 - 35增加了 中重要次生代谢产物皂苷的含量。
接种M30 - 35可缓解盐胁迫下 幼苗的生长减弱。
