Improved salt tolerance of Chenopodium quinoa Willd. contributed by Pseudomonas sp. strain M30-35

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.

Metabacillus dongyingensis sp. nov. Is Represented by the Plant Growth-Promoting Bacterium BY2G20 Isolated from Saline-Alkaline Soil and Enhances the Growth of Zea mays L. under Salt Stress

“…Salinity is a major threat to agricultural productivity. It inhibits the growth and development of plants by affecting many physiological, biochemical, and metabolic processes ( 2 ). Salinity may cause nutrient deficiencies or imbalances via the competition of Na + and Cl − with nutrients such as K + , Ca 2+ , and NO − ( 3 ).…”

“…PGPRs are known to promote plant growth through the production of indole-3-acetic acid (IAA), siderophores, hydrogen cyanate and nitrogenase, and phosphate solubilization. They also possess heavy metal detoxifying activity, enhance salinity tolerance, and are effective in the biological control of plant pathogens, and so forth ( 2 , 4 – 6 ). The genus Bacillus comprises typical species of PGPRs that are applied as biofertilizers and competitors of plant pathogens to enhance plant growth, for example, by promoting seedling emergence, enhancing plant biomass, and controlling disease ( 7 ).…”

Enhancing quinoa growth under severe saline-alkali stress by phosphate solubilizing microorganism Penicillium funicuiosum P1

“…However, biological methods commonly worked on lighter level saline-alkali soil, such as Chenopodium quinoa . As a halophyte, Chenopodium quinoa grows well and improves soil properties under moderate salt stress (100–200 mM of NaCl) [ 22 ]. However, the survival rate is low under high saline-alkali stress.…”

Isolation of salt-tolerant Pseudomonas strains with potential for alleviation of salt stress in peanut plant (Arachis hypogaea L.)

“…These results were in agreement with previous studies that also investigated the alleviation of salt stress by Pseudomonas in plant development. Cai et al (2021) reported that Chenopodium quinoa Willd. inoculated with Pseudomonas sp.…”