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- W2890734487 abstract "Summary The increasing demand for food production and predicted climate change scenarios highlight the need for improvements in crop sustainability. The efficient use of water will become increasingly important for rainfed agricultural crops even in fertile regions that have historically received ample precipitation. Improvements in water-use efficiency in Zea mays have been limited, and warrants a renewed effort aided by molecular breeding approaches. Progress has been constrained by the difficulty of measuring water-use in a field environment. The stable carbon isotope composition (δ 13 C) of the leaf has been proposed as an integrated signature of carbon fixation with a link to stomatal conductance. However, additional factors affecting leaf δ 13 C exist, and a limited number of studies have explored this trait in Z. mays . Here we present an extensive characterization of leaf δ 13 C in Z. mays . Significant variation in leaf δ 13 C exists across diverse lines of Z. mays , which we show to be heritable across several environments. Furthermore, we examine temporal and spatial variation in leaf δ 13 C to determine the optimum sampling time to maximize the use of leaf δ 13 C as a trait. Finally, our results demonstrate the relationship between transpiration and leaf δ 13 C in the field and the greenhouse. Decreasing transpiration and soil moisture are associated with decreasing leaf δ 13 C. Taken together these results outline a strategy for using leaf δ 13 C and reveal its usefulness as a measure of transpiration efficiency under well-watered conditions rather than a predictor of performance under drought. Significance Statement This study identifies sources of variation in stable carbon isotopes of maize leaves and establishes the framework for connecting leaf δ 13 C and transpiration efficiency." @default.
- W2890734487 created "2018-09-27" @default.
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- W2890734487 date "2018-09-12" @default.
- W2890734487 modified "2023-09-23" @default.
- W2890734487 title "Stable Carbon Isotopes in Zea mays" @default.
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- W2890734487 doi "https://doi.org/10.1101/414789" @default.
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