scholarly journals Carbon Isotope Composition of Carbohydrates and Polyols in Leaf and Phloem Sap ofPhaseolus vulgarisL. Influences Predictions of Plant Water Use Efficiency

2016 ◽  
Vol 57 (8) ◽  
pp. 1756-1766 ◽  
Author(s):  
Millicent Smith ◽  
Birgit Wild ◽  
Andreas Richter ◽  
Kevin Simonin ◽  
Andrew Merchant
Keyword(s):  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Water Use ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Plant Water ◽  
Phloem Sap ◽  
Plant Water Use ◽  
Use Efficiency

scholarly journals A genetic link between leaf carbon isotope composition and whole‐plant water use efficiency in the C 4 grass Setaria

2020 ◽  
Vol 102 (6) ◽  
pp. 1234-1248 ◽  
Author(s):  
Patrick Z. Ellsworth ◽  
Max J. Feldman ◽  
Ivan Baxter ◽  
Asaph B. Cousins
Keyword(s):  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Water Use ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Plant Water ◽  
Genetic Link ◽  
Plant Water Use ◽  
Whole Plant ◽  
Use Efficiency

scholarly journals The physiological basis for genetic variation in water use efficiency and carbon isotope composition in Arabidopsis thaliana

2013 ◽  
Vol 119 (1-2) ◽  
pp. 119-129 ◽  
Author(s):  
Hsien Ming Easlon ◽  
Krishna S. Nemali ◽  
James H. Richards ◽  
David T. Hanson ◽  
Thomas E. Juenger ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Variation ◽  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Water Use ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Physiological Basis ◽  
Use Efficiency

scholarly journals A genetic link between whole-plant water use efficiency and leaf carbon isotope composition in the C4 grass Setaria

2018 ◽  
Author(s):  
Patrick Z. Ellsworth ◽  
Max J. Feldman ◽  
Ivan Baxter ◽  
Asaph B. Cousins
Keyword(s):  
Plant Breeding ◽  
Water Use Efficiency ◽  
Water Use ◽  
Genetic Architecture ◽  
Isotope Composition ◽  
Plant Water ◽  
Breeding Programs ◽  
Plant Water Use ◽  
Whole Plant ◽  
Use Efficiency

AbstractIncreasing whole plant water use efficiency (yield per transpiration; WUEplant) through plant breeding can benefit the sustainability of agriculture and improve crop yield under drought. To select for WUEplant, an efficient phenotyping method that reports on the genetic contribution of component traits such as transpiration efficiency (TEi; rate of CO2 assimilation per stomatal conductance) must be developed. Leaf carbon stable isotope composition (δ13Cleaf) has been proposed as a high-throughput proxy for TEi, and a negative correlation between δ13Cleaf and both WUEplant and TEi has previously been demonstrated in several C4 grass species. Therefore, the aim of the research presented here was to determine if the same loci control δ13Cleaf, WUEplant, and TEi under well-watered and water-limited conditions in a recombinant inbred line (RIL) population of closely related C4 grasses Setaria viridis and S. italica. Three quantitative trait loci (QTL) for δ13Cleaf were co-localized with transpiration, biomass, and a linear model of WUE. When WUEplant was calculated for allele classes based on the three QTL for δ13Cleaf, δ13Cleaf was negatively correlated with WUEplant as theory predicts when WUEplant is in part driven by differences in TEi. In any population, multiple traits can influence WUEplant; however, the analysis of δ13Cleaf in this RIL population demonstrates that there is genetic control of TEi that significantly contributes to WUEplant. Furthermore, this research suggests that δ13Cleaf can be used in marker-assisted breeding to select for TEi and as a tool to better understand the physiology and genetic architecture of TEi and WUEplant in C4 species.Significance StatementOverextended water resources and drought are major agricultural problems worldwide. Therefore, selection for increased plant water use efficiency (WUEplant) in food and biofuel crop species is an important trait in plant breeding programs. Leaf carbon isotopic composition (δ13Cleaf) has potential as a rapid and effective high throughput phenotyping method for intrinsic transpiration efficiency (TEi), an important leaf-level component trait of WUEplant. Our research shows that δ13Cleaf and WUEplant share a common genetic architecture through their shared relationship with TEi. This suggests that δ13Cleaf can be used as a screen for TEi in marker-assisted plant breeding programs to improve crop drought resistance and decrease agricultural water consumption.

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