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Halotolerant endophytic bacteria alleviate salinity stress in rice (oryza sativa L.) by modulating ion content, endogenous hormones, the antioxidant system and gene expression. | LitMetric

AI Article Synopsis

  • Excessive salinity is a major global issue affecting crop production, prompting researchers to explore solutions using endophytic bacteria.
  • Three specific bacterial isolates (ART-1, ART-10, CAL-8) were tested on rice plants under high salinity (160 mM NaCl), resulting in improved growth and chlorophyll content.
  • These bacteria influenced key hormone levels and mineral content in rice, suggesting their potential role as an eco-friendly option to enhance crop resilience against salinity stress.

Article Abstract

Excessive salinity reduces crop production and negatively impacts agriculture worldwide. We previously isolated endophytic bacterial strains from two halophytic species: Artemisia princeps and Chenopodium ficifolium. We used three bacterial isolates: ART-1 (Lysinibacillus fusiformis), ART-10 (Lysinibacillus sphaericus), and CAL-8 (Brevibacterium pityocampae) to alleviate the impact of salinity stress on rice. The impact of 160 mM NaCl salinity on rice was significantly mitigated following inoculation with these bacterial strains, resulting in increased growth and chlorophyll content. Furthermore, OsNHX1, OsAPX1, OsPIN1 and OsCATA expression was increased, but OsSOS expression was decreased. Inductively coupled plasma mass spectrometry (ICP-MS) revealed reduced K and Na levels in shoots of bacteria-inoculated plants, whereas that of Mg was increased. Bacterial inoculation reduced the content of total flavonoids in rice leaves. Salinized plants inoculated with bacteria showed reduced levels of endogenous salicylic acid (SA) and abscisic acid (ABA) but increased levels of jasmonic acid (JA). In conclusion, the bacterial isolates ART-1, ART-10, and CAL-8 alleviated the adverse effect of salinity on rice growth, which justifies their use as an eco-friendly agricultural practice.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10576267PMC
http://dx.doi.org/10.1186/s12870-023-04517-zDOI Listing

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