Abstract
BackgroundPlant-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.MethodsThe 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.ResultsM30-35 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.ConclusionInoculation of M30-35 rescues the growth diminution of C. quinoa seedlings under salt stress.
Highlights
Salinity is a major threat to crop production, especially in arid and semi-arid areas (Flowers & Colmer, 2008; Schleiff, 2008)
We evaluated the effects of M30-35 inoculation on the growth and metabolite accumulation of Chenopodium quinoa Willd. during salt stress growth conditions
We compared the effect of adding Luria broth (LB) to plants grown in the presence or absence of M30-35
Summary
Salinity is a major threat to crop production, especially in arid and semi-arid areas (Flowers & Colmer, 2008; Schleiff, 2008). Salt stress has a negative effect on plant growth, and development (Yu et al, 2018), and it is challenging to determine the efficient use of saline soilsfor food production. Two primary strategies, modified agricultural practices and the development of new varieties adapted to saline soils, are being used for growing crops in saline soils. These strategies have produced useful, results but they are still in the. The effects of M30-35 on the growth of C. quinoa seedlings were tested under salt stress. Inoculation of M30-35 rescues the growth diminution of C. quinoa seedlings under salt stress
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