Rice NADP-dependent malate dehydrogenase gene OsMDH8.2 is involved in heat tolerance.

ABSTRACT: Convergent and divergent evolution lead to plants with stronger adaptability to higher temperatures, thus averting crop biomass yield reductions. NADP-dependent malate dehydrogenase (NADP-MDH) is a redox-regulated enzyme that catalyzes the reversible reduction of oxaloacetate to malate. The sole NADP-MDH gene in rice, OsMDH8.2, is expressed in mesophyll cells of photosynthetic organs and various sink tissues. However, it is unknown whether NADP-MDH functions in heat stress in rice. We characterized a transgenic OsMDH8.2 overexpression line under thermal stress treatment (40 °C). The transgenic line exhibited better adaptability to heat stress than the wild type; it better maintained biomass and a lower surface temperature through stomatal closure, and photosynthetic activity

SUBMITTER: Jiang M 

PROVIDER: S-EPMC12848211 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature