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Accounting for mesophyll conductance substantially improves 13C-based estimates of intrinsic water-use efficiency

Ma, Wei Ting; Tcherkez, Guillaume; Wang, Xu Ming; Schaufele, Rudi; Schnyder, Hans; Yang, Yusheng; Gong, Xiao Ying

Description

Carbon isotope discrimination (Δ) has been used widely to infer intrinsic water‐use efficiency (iWUE) of C3 plants, a key parameter linking carbon and water fluxes. Despite the essential role of mesophyll conductance (gm) in photosynthesis and Δ, its effect on Δ‐based predictions of iWUE has generally been neglected. Here, we derive a mathematical expression of iWUE as a function of Δ that includes gm (iWUEmes) and exploits the gm‐stomatal conductance (gsc) relationship across drought‐stress...[Show more]

CollectionsANU Research Publications
Date published: 2021
Type: Journal article
URI: http://hdl.handle.net/1885/270000
Source: New Phytologist
DOI: 10.1111/nph.16958

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