Photosynthesis in newly developed leaves of heat-tolerant wheat acclimates to long-term nocturnal warming.

ABSTRACT: We examined photosynthetic traits of pre-existing and newly developed flag leaves of four wheat genotypes grown in controlled-environment experiments. In newly developed leaves, acclimation of the maximum rate of net CO2 assimilation (An) to warm nights (i.e. increased An) was associated with increased capacity of Rubisco carboxylation and photosynthetic electron transport, with Rubisco activation state probably contributing to increased Rubisco activity. Metabolite profiling linked acclimation of An to greater accumulation of monosaccharides and saturated fatty acids in leaves; these changes suggest roles for osmotic adjustment of leaf turgor pressure and maintenance of cell membrane integrity. By contrast, where An decreased under warm nights, the decline was related to lower stomatal co

SUBMITTER: Coast O 

PROVIDER: S-EPMC10837020 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature