Efficient acquisition of iron confers greater tolerance to saline-alkaline stress in rice (Oryza sativa L.).

ABSTRACT: To elucidate the mechanisms underlying tolerance to saline-alkaline stress in two rice genotypes, Dongdao-4 and Jigeng-88, we exposed them to medium supplemented with 10 mM Na₂CO₃ and 40 mM NaCl (pH 8.5). Dongdao-4 plants displayed higher biomass, chlorophyll content, and photosynthetic rates, and a larger root system than Jigeng-88 under saline-alkaline conditions. Dongdao-4 had a higher shoot Na⁺/K⁺ ratio than Jigeng-88 under both control and saline-alkaline conditions. Dongdao-4 exhibited stronger rhizospheric acidification than Jigeng-88 under saline-alkaline conditions, resulting from greater up-regulation of H⁺-ATPases at the transcriptional level. Moreover, Fe concentrations in shoots and roots of Dongdao-4 were higher than thos

SUBMITTER: Li Q 

PROVIDER: S-EPMC5181582 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature