Journal ArticleDOI
Isotopic Composition of Plant Carbon Correlates With Water-Use Efficiency of Wheat Genotypes
TLDR
It is suggested that carbon-isotope analysis may be a useful tool in selection for improved water-use efficiency in breeding programmes for C3 species.Abstract:
Variation in carbon-isotope composition among and between wheat genotypes was correlated with variation in water-use efficiency in separate pot experiments conducted in spring-summer and in winter. In the main, winter experiment, the water-use efficiencies ranged from 2.0 to 3.7 mmolC/mol H2O (means of four replicates) while the corresponding isotope effects for leaf material ranged from 1.0225 to 1.0194. 13C was more abundant in grain than in leaves and stems. It is suggested that carbon-isotope analysis may be a useful tool in selection for improved water-use efficiency in breeding programmes for C3 species.read more
Citations
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Journal ArticleDOI
Carbon Isotope Discrimination and Photosynthesis
TL;DR: In this article, the physical and enzymatic bases of carbone isotope discrimination during photosynthesis were discussed, noting how knowledge of discrimination can be used to provide additional insight into photosynthetic metabolism and the environmental influences on that process.
Journal ArticleDOI
Carbon Isotopes in PhotosynthesisFractionation techniques may reveal new aspects of carbon dynamics in plants
TL;DR: The fractionation of carbon isotopes that occurs during photosynthesis is one of the most useful techniques for investigating the efficiency of CO2 uptake and indicates that different strategies are needed for improving wateruse efficiency in different kinds of plants.
Journal ArticleDOI
Stable Isotopes in Plant Ecology
TL;DR: How isotope measurements associated with the critical plant resources carbon, water, and nitrogen have helped deepen the understanding of plant-resource acquisition, plant interactions with other organisms, and the role of plants in ecosystem studies is reviewed.
Book ChapterDOI
Inherent Variation in Growth Rate Between Higher Plants: A Search for Physiological Causes and Ecological Consequences
Hans Lambers,Hendrik Poorter +1 more
TL;DR: It is likely that there are trade-offs between growth potential and performance under adverse conditions, however, the current ecophysiological information explaining variation in RGR is too limited to support this contention quantitatively.
Book ChapterDOI
A critical evaluation of traits for improving crop yields in water-limited environments.
M.M. Ludlow,R.C. Muchow +1 more
TL;DR: This chapter describes the components of yield and the determinants of survival against which the proposed and demonstrated contributions by traits are critically assessed and presents simulation models, which are very powerful tools for critically assessing the value of putative traits.
References
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Journal ArticleDOI
Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves.
TL;DR: It was found that the response of the rate of CO2 Assimilation to irradiance, partial pressure of O2, p(O2), and temperature was different at low and high intercellular p(CO2), suggesting that CO2 assimilation rate is governed by different processes at lowand high inter cellular p (CO2).
Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
TL;DR: In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.
Journal ArticleDOI
On the Relationship Between Carbon Isotope Discrimination and the Intercellular Carbon Dioxide Concentration in Leaves
TL;DR: It is shown how diffusion of gaseous COz can significantly affect carbon isotopic discrimination and a simple relationship between discrimination and the ratio of the intercellular and atmospheric partial pressures of COZ is developed.
Journal ArticleDOI
Carbon isotope fractionation between dissolved bicarbonate and gaseous carbon-dioxide
TL;DR: In this paper, the stable carbon isotope fractionation between gaseous CO 2 and dissolved bicarbonate has been measured from 5 to 25°C by a method of high precision.
Journal ArticleDOI
Nitrogen and Photosynthesis in the Flag Leaf of Wheat (Triticum aestivum L.)
TL;DR: Wheat (Triticum aestivum L. cv Yecora 70) plants were grown with various concentrations of nitrate nitrogen available to the roots and rates of gas exchange, ribulose-1,5-bisphosphate (RuP(2)) carboxylase activity, and the amounts of chlorophyll, soluble protein, nitrogen, and phosphorus were determined for each flag leaf.