Effects of kinetics of light-induced stomatal responses on photosynthesis and water-use efficiency.

ABSTRACT: Both photosynthesis (A) and stomatal conductance (gs ) respond to changing irradiance, yet stomatal responses are an order of magnitude slower than photosynthesis, resulting in noncoordination between A and gs in dynamic light environments. Infrared gas exchange analysis was used to examine the temporal responses and coordination of A and gs to a step increase and decrease in light in a range of different species, and the impact on intrinsic water use efficiency was evaluated. The temporal responses revealed a large range of strategies to save water or maximize photosynthesis in the different species used in this study but also displayed an uncoupling of A and gs in most of the species. The shape of the guard cells influenced the rapidity of response and the overall gs values achieved, wit

SUBMITTER: McAusland L 

PROVIDER: S-EPMC4982059 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature