Deyu Cai 1,2,3 , Ying Xu 2 , Fei Zhao 1 , Yan Zhang 2 , Huirong Duan 4 , Xiaonong Guo 1,2,3 Show Affiliations »
Abstract
BACKGROUND: Plant-growth-promoting rhizobacteria (PGPR) can promote plant growth and enhance plant tolerance to salt stress. Pseudomonas 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 Chenopodium quinoa Willd. during salt stress growth conditions. METHODS: The effects of M30-35 on the growth of C. quinoa seedlings were tested under salt stress. Seedling growth parameters measured included chlorophyll content, root activity, levels of plant- phosphorus (P), and saponin content. RESULTS: 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 C. quinoa 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 C. quinoa, was increased by the inoculation of M30-35 under 300 mM NaCl conditions. CONCLUSION: Inoculation of M30-35 rescues the growth diminution of C. quinoa seedlings under salt stress. ©2021 Cai et al.
BACKGROUND: Plant-growth-promoting rhizobacteria (PGPR) can promote plant growth and enhance plant tolerance to salt stress. Pseudomonas 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 Chenopodium quinoa Willd. during salt stress growth conditions. METHODS: The effects of M30-35 on the growth of C. quinoa seedlings were tested under salt stress. Seedling growth parameters measured included chlorophyll content, root activity, levels of plant- phosphorus (P), and saponin content. RESULTS: 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 C. quinoa 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 C. quinoa, was increased by the inoculation of M30-35 under 300 mM NaCl conditions. CONCLUSION: Inoculation of M30-35 rescues the growth diminution of C. quinoa seedlings under salt stress. ©2021 Cai et al.
Entities: Chemical
Keywords:
Chenopodium quinoa; Photosynthesis; Plant-growth-promoting; Pseudomonas sp. strain M30-35; Salt stress
Year: 2021
PMID： 33520465 PMCID： PMC7811290 DOI： 10.7717/peerj.10702
Source DB: PubMed Journal: PeerJ ISSN： 2167-8359 Impact factor: 2.984