scholarly journals Variation among Soybean Cultivars in Mesophyll Conductance and Leaf Water Use Efficiency

Plants ◽  
2016 ◽  
Vol 5 (4) ◽  
pp. 44 ◽  
Author(s):  
James Bunce
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Leaf Water ◽  
Mesophyll Conductance ◽  
Soybean Cultivars ◽  
Use Efficiency

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

scholarly journals Consistent Differences in Field Leaf Water-Use Efficiency among Soybean Cultivars

Plants ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 123 ◽  
Author(s):  
James Bunce
Keyword(s):  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Water Use ◽  
Vapor Pressure Deficit ◽  
Cultivar Differences ◽  
Stomatal Response ◽  
Soybean Cultivars ◽  
Air Temperatures ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

High intrinsic water-use efficiency (WUEi), the ratio of leaf photosynthesis to stomatal conductance, may be a useful trait in adapting crops to water-limited environments. In soybean, cultivar differences in stomatal response to vapor pressure deficit have not consistently translated into differences in WUEi in the field. In this study, six cultivars of soybeans previously shown to differ in WUEi in indoor experiments were grown in the field in Beltsville, Maryland, and tested for mid-day WUEi on nine clear days during the mid-seasons of two years. Measurement dates were chosen for diverse temperatures, and air temperatures ranged from 21 to 34 °C on the different dates. Air saturation deficits for water vapor ranged from 0.9 to 2.2 kPa. Corrected carbon isotope delta values for 13C (CID) were determined on mature, upper canopy leaves harvested during early pod filling each year. WUEi differed among cultivars in both years and the differences were consistent across measurement dates. Correlations between mean WUEi and CID were not significant in either year. It is concluded that consistent cultivar differences in WUEi exist in these soybean cultivars under field conditions, but that carbon isotope ratios may not be useful in identifying them because of cultivar differences in mesophyll conductance.

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
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