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Diurnal Variation in Gas Exchange: The Balance between Carbon Fixation and Water Loss

Matthews, Jack SA and Vialet-Chabrand, Silvere RM and Lawson, Tracy (2017) 'Diurnal Variation in Gas Exchange: The Balance between Carbon Fixation and Water Loss.' Plant Physiology, 174 (2). pp. 614-623. ISSN 0032-0889

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Stomatal control of transpiration is critical for maintaining important processes, such as plant water status, leaf temperature, as well as permitting sufficient CO2 diffusion into the leaf to maintain photosynthetic rates (A). Stomatal conductance often closely correlates with A and is thought to control the balance between water loss and carbon gain. It has been suggested that a mesophyll-driven signal coordinates A and stomatal conductance responses to maintain this relationship; however, the signal has yet to be fully elucidated. Despite this correlation under stable environmental conditions, the responses of both parameters vary spatially and temporally and are dependent on species, environment, and plant water status. Most current models neglect these aspects of gas exchange, although it is clear that they play a vital role in the balance of carbon fixation and water loss. Future efforts should consider the dynamic nature of whole-plant gas exchange and how it represents much more than the sum of its individual leaf-level components, and they should take into consideration the long-term effect on gas exchange over time.

Item Type: Article
Uncontrolled Keywords: Carbon; Water; Signal Transduction; Photosynthesis; Plant Transpiration; Circadian Rhythm; Plant Stomata; Carbon Cycle; Mesophyll Cells
Subjects: Q Science > QK Botany
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 14 Jul 2017 13:17
Last Modified: 18 Aug 2022 11:23

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