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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
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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
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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
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Journal Article
Halotolerant endophytic bacteria alleviate salinity stress in rice (oryza sativa L.) by modulating ion content, endogenous hormones, the antioxidant system and gene expression
2023
Overview
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
2+
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.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
