Options
The slope of assimilation rate against stomatal conductance should not be used as a measure of water use efficiency or stomatal control over assimilation
Author(s)
Date Issued
2023-10-30
Date Available
2024-11-13T10:51:24Z
Abstract
Quantifying water use efficiency, and the impact of stomata on CO2 uptake are pivotal in physiology and efforts to improve crop yields. Although tempting, relying on regression slopes from assimilation-stomatal conductance plots to estimate water use efficiency or stomatal control over assimilation is erroneous. Through numerical simulations, I substantiate this assertion. I propose the term ‘instantaneous transpiration efficiency’ for the assimilation-to-transpiration ratio to avoid confusion with ‘intrinsic water use efficiency’ which refers to the assimilation-to-stomatal conductance ratio, and recommend to compute both metrics for each gas exchange data point.
Type of Material
Journal Article
Publisher
Springer
Journal
Photosynthesis Research
Volume
158
Issue
3
Start Page
195
End Page
199
Copyright (Published Version)
2023 The Authors
Language
English
Status of Item
Peer reviewed
ISSN
0166-8595
This item is made available under a Creative Commons License
File(s)
Loading...
Name
bellasio 2023 slope of assimilation.pdf
Size
804.47 KB
Format
Adobe PDF
Checksum (MD5)
970e4bc2a35e7fd65d0e075209cdbbe5
Owning collection