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Rethinking Guard Cell Metabolism

Santelia, Diana and Lawson, Tracy (2016) 'Rethinking Guard Cell Metabolism.' Plant Physiology, 172 (3). pp. 1371-1392. ISSN 0032-0889

Plant Physiol.-2016-Santelia-1371-92.pdf - Published Version

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Stomata control gaseous fluxes between the internal leaf air spaces and the external atmosphere and, therefore, play a pivotal role in regulating CO 2 uptake for photosynthesis as well as water loss through transpiration. Guard cells, which flank the stomata, undergo adjustments in volume, resulting in changes in pore aperture. Stomatal opening is mediated by the complex regulation of ion transport and solute biosynthesis. Ion transport is exceptionally well understood, whereas our knowledge of guard cell metabolism remains limited, despite several decades of research. In this review, we evaluate the current literature on metabolism in guard cells, particularly the roles of starch, sucrose, and malate. We explore the possible origins of sucrose, including guard cell photosynthesis, and discuss new evidence that points to multiple processes and plasticity in guard cell metabolism that enable these cells to function effectively to maintain optimal stomatal aperture. We also discuss the new tools, techniques, and approaches available for further exploring and potentially manipulating guard cell metabolism to improve plant water use and productivity.

Item Type: Article
Uncontrolled Keywords: Carbon; Carboxylic Acids; Starch; Sucrose; Photosynthesis; Plant Stomata
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: 21 Feb 2017 16:44
Last Modified: 18 Aug 2022 11:18

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