scholarly journals Greater efficiency of water use in poplar clones having a delayed response of mesophyll conductance to drought

2015 ◽  
Vol 35 (2) ◽  
pp. 172-184 ◽  
Author(s):  
G. Theroux Rancourt ◽  
G. Ethier ◽  
S. Pepin
Keyword(s):  
Water Use ◽  
Delayed Response ◽  
Mesophyll Conductance ◽  
Poplar Clones

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.

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

Stomatal control of water use efficiency in poplar clones and hybrids

1984 ◽  
Vol 62 (7) ◽  
pp. 1344-1351 ◽  
Author(s):  
T. J. Blake ◽  
T. J. Tschaplinski ◽  
A. Eastham
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Dry Matter ◽  
Stomatal Resistance ◽  
Water Efficiency ◽  
Stomatal Control ◽  
Poplar Clones ◽  
Matter Production ◽  
Abaxial Leaf Surface ◽  
Use Efficiency

Water use efficiency (WUE, the ratio of dry matter produced to water used in transpiration) was studied in 17 poplar clones and hybrids. Although WUE could not be predicted from the poplar group alone, water efficiency was found to vary in different poplar genotypes. For example, a balsam poplar, Populus maximowiczii M-4 (section Tacamahaca), and a white poplar clone, P. alba A-499 (section Leuce), had twice the dry matter production per unit of water transpired compared with another clone of P. maximowiczii (M-13) and a Cottonwood clone, P. nigra N-80 (section Aegeiros), which showed low WUE. The reduced transpiration in water-efficient clones per unit of dry matter produced was associated with a higher stomatal resistance on the abaxial leaf surface. However, the physiological and morphological basis of WUE varied in different clones. Water-efficient clones exhibited one or more of the following adaptations restricting water loss: (i) conspicuous cuticular ledges or hairs above the pore openings of stomata, (ii) earlier partial stomatal opening in the morning, and (iii) smaller stomata and a lower stomatal frequency on the adaxial surface of the upper leaves. Poplar clones of low WUE exhibited less stomatal control of transpiration as a result of lower stomatal resistances and they lacked the above adaptations. Relative ranking of genotypes could not be predicted from either dry matter productivity or transpiration rate alone although the most water efficient clones generally exhibited lower transpiration rates compared with less efficient clones.

scholarly journals Growth, productivity and water use in three hybrid poplar clones

1998 ◽  
Vol 18 (12) ◽  
pp. 829-835 ◽  
Author(s):  
C. A. Souch ◽  
W. Stephens
Keyword(s):  
Water Use ◽  
Hybrid Poplar ◽  
Poplar Clones
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