McAusland, Lorna and Vialet-Chabrand, Silvère and Davey, Philip and Baker, Neil R and Brendel, Oliver and Lawson, Tracy (2016) 'Effects of kinetics of light-induced stomatal responses on photosynthesis and water-use efficiency.' New Phytologist, 211 (4). pp. 1209-1220. ISSN 0028-646X
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Abstract
Both photosynthesis (A) and stomatal conductance (g s ) respond to changing irradiance, yet stomatal responses are an order of magnitude slower than photosynthesis, resulting in noncoordination between A and g s in dynamic light environments. Infrared gas exchange analysis was used to examine the temporal responses and coordination of A and g s 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 g s in most of the species. The shape of the guard cells influenced the rapidity of response and the overall g s values achieved, with different impacts on A and W i . The rapidity of g s in dumbbell-shaped guard cells could be attributed to size, whilst in elliptical-shaped guard cells features other than anatomy were more important for kinetics. Our findings suggest significant variation in the rapidity of stomatal responses amongst species, providing a novel target for improving photosynthesis and water use.
Item Type: | Article |
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Uncontrolled Keywords: | guard cells, intrinsic water use efficiency, kinetics of stomatal responses, photosynthesis, stomatal conductance |
Subjects: | Q Science > QH Natural history > QH301 Biology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Elements |
Depositing User: | Elements |
Date Deposited: | 23 May 2016 20:25 |
Last Modified: | 15 Jan 2022 00:27 |
URI: | http://repository.essex.ac.uk/id/eprint/16781 |
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