Alteration of the coupling between photosystem ii electron transport and CO2 assimilation in Triticum aestivum L. under water deficit

Abstract

Water deficit is one of the major factors limiting the photosynthetic productivity of plants. Under drought conditions, the decline in CO2 assimilation may result not only from stomatal limitations, but also from impaired coordination between photochemical reactions and carboxylation processes. The aim of the present study was to assess changes in the relationship between electron transport in photosystem II (ETR) and net CO2 assimilation (A) across different genotypes of Triticum aestivum L. under contrasting water supply conditions.