scholarly journals Stable Carbon Isotope Composition (δ13C), Water Use Efficiency, and Biomass Productivity of Lycopersicon esculentum, Lycopersicon pennellii, and the F1 Hybrid

1988 ◽  
Vol 88 (1) ◽  
pp. 213-217 ◽  
Author(s):  
Bjorn Martin ◽  
Yvonne R. Thorstenson
Keyword(s):  
Lycopersicon Esculentum ◽  
Water Use ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Biomass Productivity ◽  
Carbon Isotope Composition ◽  
Stable Carbon ◽  
F1 Hybrid ◽  
Lycopersicon Pennellii ◽  
Use Efficiency

scholarly journals The Genetic Architecture of Leaf Stable Carbon Isotope Composition in Zea mays and the Effect of Transpiration Efficiency on Leaf Elemental Accumulation

2021 ◽  
Author(s):  
Crystal A Sorgini ◽  
Lucas M Roberts ◽  
Madsen Sullivan ◽  
Asaph B Cousins ◽  
Ivan Baxter ◽  
...  
Keyword(s):  
Leaf Area ◽  
Carbon Isotope ◽  
Water Use ◽  
Specific Leaf Area ◽  
Genetic Architecture ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Carbon Isotope Composition ◽  
Transpiration Efficiency ◽  
Stable Carbon

Abstract With increased demand on freshwater resources for agriculture, it is imperative that more water-use efficient crops are developed. Leaf stable carbon isotope composition, δ13C, is a proxy for transpiration efficiency and a possible tool for breeders, but the underlying mechanisms effecting δ13C in C4 plants are not known. It has been suggested that differences in specific leaf area, which potentially reflects variation in internal CO2 diffusion, can impact leaf δ13C. Furthermore, although it is known that water movement is important for elemental uptake, it is not clear how manipulation of transpiration for increased water-use efficiency may impact nutrient accumulation. Here we characterize the genetic architecture of leaf δ13C and test its relationship to specific leaf area and the ionome in five populations of maize. Five significant QTL for leaf δ13C were identified, including novel QTL as well as some that were identified previously in maize kernels. One of the QTL regions contains an Erecta-like gene, the ortholog of which has been shown to regulate transpiration efficiency and leaf δ13C in Arabidopsis. QTL for δ13C were located in the same general chromosome region, but slightly shifted, when comparing data from two different years. Our data does not support a relationship between δ13C and specific leaf area, and of the 19 elements analyzed, only a weak correlation between molybdenum and δ13C was detected. Together these data add to the genetic understanding of leaf δ13C in maize and suggest that improvements to plant water use may be possible without significantly influencing elemental homeostasis.

scholarly journals The Genetic Architecture of Leaf Stable Carbon Isotope Composition in Zea mays and the Effect of Transpiration Efficiency on Elemental Accumulation

2020 ◽  
Author(s):  
Crystal A. Sorgini ◽  
Lucas M. Roberts ◽  
Asaph B. Cousins ◽  
Ivan Baxter ◽  
Anthony J. Studer
Keyword(s):  
Leaf Area ◽  
Carbon Isotope ◽  
Water Use ◽  
Specific Leaf Area ◽  
Genetic Architecture ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Carbon Isotope Composition ◽  
Transpiration Efficiency ◽  
Stable Carbon

ABSTRACTWith increased demand on freshwater resources for agriculture, it is imperative that more water-use efficient crops are developed. Leaf stable carbon isotope composition, δ13C, is a proxy for transpiration efficiency and a possible tool for breeders, but the underlying mechanisms effecting δ13C in C4 plants are not known. It has been suggested that differences in specific leaf area, which potentially reflects variation in internal CO2 diffusion, can impact leaf δ13C. However, at this point the relationship has not been tested in maize. Furthermore, although it is known that water movement is important for elemental uptake, it is not clear how manipulation of transpiration for increased water-use efficiency may impact nutrient accumulation. Here we characterize the underlying genetic architecture of leaf δ13C and test its relationship to specific leaf area and the ionome in four biparental populations of maize. Five significant QTL for leaf δ13C were identified, including both novel QTL as well as some that were identified previously in maize kernels. One of the QTL regions contains an Erecta-like gene, the ortholog of which has been shown to regulate transpiration efficiency and leaf δ13C in Arabidopsis. Our data does not support a relationship between δ13C and specific leaf area, and of the 19 elements analyzed, only a weak correlation between molybdenum and δ13C was detected. Together these data begin to build a genetic understanding of leaf δ13C in maize and suggest the potential to improve plant water use without significantly influencing elemental homeostasis.Article SummaryQuantitative genetics approaches were used to investigate the genetic architecture of leaf stable carbon isotope discrimination (δ13C) in maize. Developing a better understanding of leaf δ13C could facilitate its use in breeding for reduced transpirational water loss. Several genomic regions were identified that contribute to the variation observed in leaf δ13C. Furthermore, contrary to what has been observed in other species, leaf δ13C was not correlated with specific leaf area. Finally, a leaf ionomic analysis indicates that a reduction in transpiration, and thus mass flow, would not result in a decrease in nutrient accumulation.

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

Factors affecting 13C/12C ratios of inland halophytes. I. Controlled studies on growth and isotopic composition of Puccinellia nuttalliana

1986 ◽  
Vol 64 (11) ◽  
pp. 2693-2699 ◽  
Author(s):  
Robert D. Guy ◽  
David M. Reid ◽  
H. Roy Krouse
Keyword(s):  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Isotope Analysis ◽  
Research Problem ◽  
Carbon Isotope Composition ◽  
Stable Carbon ◽  
Factors Affecting ◽  
Plant Parts ◽  
High Level ◽  
Puccinellia Nuttalliana

Studies on various factors affecting the growth and stable carbon isotope composition of the graminaceous C3 halophyte Puccinellia nuttalliana (Schultes) Hitch. were initiated as a step towards interpreting δ13C variations in nature. For isotope analysis, combustion at 900 °C resulted in higher CO2 yield than at 550 °C but did not affect δ13C values. Differences in δ13C between leaves of different insertion level were unimportant, but roots were about 1‰ more positive than shoots. Trends in δ13C with salinity were the same in all plant parts. Depressions of growth by NaCl or Na2SO4 were similar, but plants grown in Na2SO4 displayed a greater shift in δ13C relative to controls. Growth rates were affected more by salinity than were previously reported photosynthetic rates. At typical salinities, δ13C changed linearly with salinity. The supply of nitrate to stressed and unstressed plants had no important influence on δ13C. Growth in polyethylene glycol produced δ13C values consistent with a high level of stress. After a salinity step-up, changes in δ13C were complete within 10 days. During winter, data were found to be heavily influenced by unintentional, human-respired CO2 enrichment. This represents a potentially serious research problem in laboratories of temperate climes.

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