Night-time warming in the field reduces nocturnal stomatal conductance and grain yield but does not alter daytime physiological responses.

ABSTRACT: Global nocturnal temperatures are rising more rapidly than daytime temperatures and have a large effect on crop productivity. In particular, stomatal conductance at night (g_sn ) is surprisingly poorly understood and has not been investigated despite constituting a significant proportion of overall canopy water loss. Here, we present the results of 3 yr of field data using 12 spring Triticum aestivum genotypes which were grown in NW Mexico and subjected to an artificial increase in night-time temperatures of 2°C. Under nocturnal heating, grain yields decreased (1.9% per 1°C) without significant changes in daytime leaf-level physiological responses. Under warmer nights, there were significant differences in the magnitude and decrease in g_sn , values of which were betwee

SUBMITTER: McAusland L 

PROVIDER: S-EPMC10952344 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature