Variability of mesophyll conductance and its relationship with water use efficiency in cotton leaves under drought pretreatment

2016 ◽  
Vol 194 ◽  
pp. 61-71 ◽  
Author(s):  
Ji-Mei Han ◽  
Hao-Feng Meng ◽  
Sai-Yu Wang ◽  
Chuang-Dao Jiang ◽  
Feng Liu ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Mesophyll Conductance ◽  
Use Efficiency

scholarly journals Whole‐tree mesophyll conductance reconciles isotopic and gas‐exchange estimates of water‐use efficiency

2020 ◽  
Author(s):  
Teresa E. Gimeno ◽  
Courtney E. Campany ◽  
John E. Drake ◽  
Craig V.M. Barton ◽  
Mark G. Tjoelker ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Mesophyll Conductance ◽  
Use Efficiency ◽  
Whole Tree

Drought response of mesophyll conductance in forest understory species - impacts on water-use efficiency and interactions with leaf water movement

2014 ◽  
Vol 152 (1) ◽  
pp. 98-114 ◽  
Author(s):  
Robert Hommel ◽  
Rolf Siegwolf ◽  
Matthias Saurer ◽  
Graham D. Farquhar ◽  
Zachary Kayler ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Movement ◽  
Leaf Water ◽  
Forest Understory ◽  
Drought Response ◽  
Mesophyll Conductance ◽  
Understory Species ◽  
Use Efficiency

Variation in mesophyll conductance among Australian wheat genotypes

2014 ◽  
Vol 41 (6) ◽  
pp. 568 ◽  
Author(s):  
Eisrat Jahan ◽  
Jeffrey S. Amthor ◽  
Graham D. Farquhar ◽  
Richard Trethowan ◽  
Margaret M. Barbour
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Photosynthetic Rate ◽  
Genotypic Variation ◽  
Leaf Age ◽  
Triticum Aestivum L ◽  
Mesophyll Conductance ◽  
Wheat Genotypes ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

CO2 diffusion from substomatal intercellular cavities to sites of carboxylation in chloroplasts (mesophyll conductance; gm) limits photosynthetic rate and influences leaf intrinsic water-use efficiency (A/gsw). We investigated genotypic variability of gm and effects of gm on A/gsw among eleven wheat (Triticum aestivum L.) genotypes under light-saturated conditions and at either 2 or 21% O2. Significant variation in gm and A/gsw was found between genotypes at both O2 concentrations, but there was no significant effect of O2 concentration on gm. Further, gm was correlated with photosynthetic rate among the 11 genotypes, but was unrelated to stomatal conductance. The effect of leaf age differed between genotypes, with gm being lower in older leaves for one genotype but not another. This study demonstrates a high level of variation in gm between wheat genotypes; 0.5 to 1.0 μmol m−2 s−1 bar−1. Further, leaf age effects indicate that great care must be taken to choose suitable leaves in studies of genotypic variation in gm and water-use efficiency.

scholarly journals Diurnal variation in mesophyll conductance and its influence on modelled water-use efficiency in a mature boreal Pinus sylvestris stand

2019 ◽  
Vol 141 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Zsofia R. Stangl ◽  
Lasse Tarvainen ◽  
Göran Wallin ◽  
Nerea Ubierna ◽  
Mats Räntfors ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Diurnal Variation ◽  
Water Use Efficiency ◽  
Water Use ◽  
Mesophyll Conductance ◽  
Use Efficiency

Mesophyll conductance to CO2 and Rubisco as targets for improving intrinsic water use efficiency in C3 plants

2015 ◽  
Vol 39 (5) ◽  
pp. 965-982 ◽  
Author(s):  
J. Flexas ◽  
A. Díaz-Espejo ◽  
M. A. Conesa ◽  
R. E. Coopman ◽  
C. Douthe ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
C3 Plants ◽  
Mesophyll Conductance ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

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

2020 ◽  
Vol 229 (3) ◽  
pp. 1326-1338
Author(s):  
Wei Ting Ma ◽  
Guillaume Tcherkez ◽  
Xu Ming Wang ◽  
Rudi Schäufele ◽  
Hans Schnyder ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Mesophyll Conductance ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

scholarly journals Revisiting the carbon isotope discrimination and water use efficiency relation: the influence of mesophyll conductance

2020 ◽  
Author(s):  
Wei Ting Ma ◽  
Guillaume Tcherkez ◽  
Xu Ming Wang ◽  
Rudi Schäufele ◽  
Hans Schnyder ◽  
...  
Keyword(s):  
Drought Stress ◽  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Functional Groups ◽  
Water Use ◽  
Carbon Isotope Discrimination ◽  
Plant Functional Groups ◽  
Mesophyll Conductance ◽  
Isotope Discrimination ◽  
Use Efficiency

SummaryThe 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 levels and plant functional groups (deciduous or semi-deciduous woody, evergreen woody and herbaceous species) in a global database. iWUEmes was further validated with an independent dataset of online-Δ and CO2 and H2O gas exchange measurements with seven species.Drought stress reduced gsc by 52% and gm by 45% averaged over all plant functional groups, but had no significant effect on the gsc/gm ratio, suggesting a well-constrained gsc/gm ratio of 0.79±0.07 (95%CI, n=198) across plant functional groups and drought-stress treatments. Due in part to the synchronous behavior of gsc and gm, gm was negatively correlated to iWUE. Incorporating the gsc/gm ratio in the iWUEmes model significantly improved the estimation of iWUE compared to the simple model.The inclusion of gm effects, even using a fixed gsc/gm ratio of 0.79 when gm is unknown, proved desirable to eliminate significant bias in estimating iWUE from Δ across various C3 vegetation types.

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