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Cell wall thickness and composition are involved in photosynthetic limitation


Flexas, J and Clemente-Moreno, MJ and Bota, J and Brodribb, TJ and Gago, J and Mizokami, Y and Nadal, M and Perera-Castro, AV and Roig-Oliver, M and Sugiura, D and Xiong, D and Carriqui, M, Cell wall thickness and composition are involved in photosynthetic limitation, Journal of Experimental Botany, 72, (11) pp. 3971-3986. ISSN 1460-2431 (2021) [Substantial Review]

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DOI: doi:10.1093/jxb/erab144


The key role of cell walls in setting mesophyll conductance to CO2 (gm) and, consequently, photosynthesis is reviewed. First, the theoretical properties of cell walls that can affect gm are presented. Then, we focus on cell wall thickness (Tcw) reviewing empirical evidence showing that Tcw varies strongly among species and phylogenetic groups in a way that correlates with gm and photosynthesis; that is, the thicker the mesophyll cell walls, the lower the gm and photosynthesis. Potential interplays of gm, Tcw, dehydration tolerance, and hydraulic properties of leaves are also discussed. Dynamic variations of Tcwin response to the environment and their implications in the regulation of photosynthesis are discussed, and recent evidence suggesting an influence of cell wall composition on gm is presented. We then propose a hypothetical mechanism for the influence of cell walls on photosynthesis, combining the effects of thickness and composition, particularly pectins. Finally, we discuss the prospects for using biotechnology for enhancing photosynthesis by altering cell wall-related genes.

Item Details

Item Type:Substantial Review
Keywords:Cell wall composition, cell wall thickness, cellulose, CO2 diffusion, hemicellulose, land plants, leaf anatomy, mesophyll conductance, pectin
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Brodribb, TJ (Professor Tim Brodribb)
UTAS Author:Carriqui, M (Mr Marc Carriqui Alcover)
ID Code:151349
Year Published:2021
Deposited By:Plant Science
Deposited On:2022-07-27
Last Modified:2022-07-27

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