Farquhar 1989 carbon isotop discrimination pdf
Aust. J. Plant Physiol., 1982, 9, 121-37 On the Relationship between Carbon Isotope Discrimination and the Intercellular Carbon Dioxide Concentration in Leaves
Field experiments were conducted over two seasons (2005–06 and 2006–07) using six durum wheat genotypes varying in grain carbon isotope discrimination (Δ) but similar in phenology.
Condon A G, Richards R A and Farquhar G D 1987 Carbon isotope discrimination is positively correlated with grain yield and dry matter production in field-grown wheat. Crop Sci. 27, 996–1001.Google Scholar Craufurd P O, Austin R B, Acevedo E and Hall M A 1991 Carbon isotope discrimination …
Carbon isotope discrimination occurring during net ecosys- tem carbon uptake should reflect the photosynthesis-weighted mean of discrimination in all plants in the ecosystem.
controlling N leaf, which influence C i/C a and V.Factors influencing N leaf may include leaf age, grazing pressure, soil properties, or weather conditions, all of which vary at different
On the relationship between carbon isotope discrimination and intercellular carbon dioxide concentration in leaves. Australian Journal of Plant Physiology 9 ( 2 ):121–37. Farquhar , GD , Ehleringer , JR , Hubick , KT .
G. Farquhar The Australian National University

CARBON ISOTOPE DISCRIMINATION IN THE C4 SHRUBATRIPLEX
Brugnoli, E., K.T. Hubick, S. von Caemmerer, S.C. Wong and G.D. Farquhar (1989) Correlation between the carbon isotope discrimination in leaf starch and sugars of C 3 plants and the ratio of intercellular and atmospheric partial pressures of carbon dioxide.
Farquhar GD, O’Leary MH, Berry JA (1982) On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration in leaves. Australian Journal of Plant Physiology 9 , 121–137.
Carbon Isotope Discrimination and Photosynthesis Annual Review of Plant Physiology and Plant Molecular Biology Vol. 40:503-537 (Volume publication date June 1989)
leaf anatomy and carbon isotope composition in coffea species related to photosynthetic pathway braz. j. plant physiol., 15(1):19-24, 2003 r e s e a r c h a r t i c l19
(Farquhar et al. 1989). Carbon isotope discrimination ( ∆) in C 3 plants is related to photosynthetic gas exchange; because ∆ is in part determined by ci/ca (Farquhar et al. 1982, Farquhar and Richards 1984, Farquhar et al. 1989). The ci/ca ratio differs among plants because of variation in stomatal conductance or because of variation in the chloroplast demand for CO2, or both
The application and interpretation of Keeling plots in terrestrial carbon cycle research D. E. Pataki,1 J. R. Ehleringer,1 L. B. Flanagan,2 D. Yakir,3 D. R. Bowling,1
production and leaf carbon isotope discrimination values changed when crops were grown on different-quality sites (the amount of rainfall was the primary difference among
carbon isotope discrimination {A) as an analogue for water use efficiency in plants since Farquhar, O’Leary & Berry (1982) showed theoretically that instantaneous water use efficiency and A are both related to Cj/Q (the ratio between the concentration of CO2 in the leaf intercellular space and that of ambient air). Experimental work subse-quently demonstrated a correlation between water use

The study of carbon isotope discrimination (∆13C) in archaeological plant remains can provide reliable information about water availability in ancient crops. In this paper, a such methodology is described, along with some case studies aimed at the
CARBON ISOTOPE DISCRIMINATION IN THE C4 SHRUBATRIPLEX CONFERTIFOLIA ALONG A SALINITY GRADIENT Darren R. Sandquistl and James R. Ehleringer1 ABSTRACT-Carbonisotope discrimination (6) was measured for leaves ofAtriplex confertifolia along a salinity gradi~ ent in northern Utah. Over this gradient, the variation ofL. values was high for a C4 species, and the L. values were …
Chapter 6 The Application of Carbon Isotope Discrimination in Cereal Improve~ne~lt for Water-Limited Environments Anthony 6. Condor1 Graharn D. Farquhar
Graham Farquhar RSB ANU Carbon isotope fractionation and Carbon isotope discrimination ( during photosynthesis • When stomata are wide open ci→ca • When stomata are nearly closed ci→0 • Relative limitation by boundary layer, stomata and mesophyll is (ca‐cc )/ca • Relative limitation by Rubiscois cc /ca • Discrimination is ≈4‰ x diffusional limitation + 29‰ x
18/12/2012 · Positive correlations between C 4 photosynthetic carbon isotope discrimination and precipitation suggest φ values above 0.34, as φ will affect the discrimination of Rubisco against 13 C , . In southern Africa, the δ 13 C values of C 4 plants are not sensitive to changes in the MAP [5] .
Stable carbon isotope uptake is discriminated by diffusion and photosynthesis at the carboxylation step (Farquhar et al., 1980). A robust model computes whole plant water use efficiency from the 13 C/ 12 C (denoted δ 13 C) in primary photosynthetic products ( Brugnoli and Farquhar, 2000 ).

Carbon-isotope discrimination is frequently used not only to estimate the ci/ca ratio, but also as a probe of long-term water-use efficiency (WUE g , the total amount of biomass accumulated over the amount of water transpired during a time interval; Farquhar et al.
δ13C ISOTOPE DISCRIMINATION OF SAFFLOWER (Carthamustinctorius L.) as explained by Farquhar et al., (1989), carbon isotope distribution can reveal information about the physical, chemical, and metabolic processes involved in carbon transformations. This is because carbon isotope discrimination occurs during photosynthetic CO 2 uptake leading to a 13C-depletion of plant organic …
CARBON ISOTOPE DISCRIMINATION 505 Rr a: R, p 1. where Rr is the I3e/12e molar ratio of reactant and Rp is that of the product. Defined in this way, a kinetic isotope effect can be …
where a is the isotopic fractionation due to the slower diffusion of 13 CO 2 versus 12 CO 2 in air (4.4‰), and b is the net isotopic fractionation associated with carboxylation activities (∼27‰) (Farquhar et al., 1989).
CARBON ISOTOPE DISCRIMINATION IN WHEAT 1443 Selection of plants of high GY or WUE is desirable to improve crop production in water limited environments.
Carbon isotope discrimination by Picea glauca and Populus tremuloides is related to the topographic depth to water index and rainfall 1 Gabriel S. Oltean, a Philip G. Comeau, a Barry White b a Department of Renewable Resources, University of Alberta, 751 General Services Building, Edmonton, AB …
Farquhar, GD, O’Leary, MH and Berry, JA (1982) On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration in leaves. Aust. J.
Carbon isotope discrimination ( ) is negatively correlated with transpiration efficiency, and low is being used for indirect selection of high wheat yield in rainfed environments. Yet little is …
Carbon isotope discrimination by macroalgae and seagrasses 357 ATP and NADPH costs of the C 3-C 4 cycle in the C 4 subtype involved, to predict the photon cost of net CO

Relationships of grain carbon isotope discrimination (Δ
Abstract. Online carbon isotope discrimination (Δ) and leaf gas exchange measurements were made with control and salt-stressed Zea mays and Andropogon glomeratus, two NADP-ME type C 4 grasses.
Carbon Isotope Discrimination, Water-Use ~f’f’icienc~, (Cownn 1977, 1988; Farquhar ct al. 1989). Where 11,. //I,, changes in response to variation in photo- syrlthctic capacity, the problem associated with weak coupling between the crop canopy and atmosphere is not as important, as incrcasedpi ly, and A arise because of decreased assimilation rate, which causes a relatively small change in
Variability in mesophyll conductance between barley genotypes, and effects on transpiration efficiency and carbon isotope discrimination pce_2138 1176..1185
G. Farquhar, The Australian National University, Research School of Biology, Faculty Member. Studies Mass Spectrometry, CHEMICAL SCIENCES, and Carbon Monoxide.
Options Méditerranéennes, Series A, No. 81 403 Assessment of durum wheat yield and carbon isotope discrimination by reflectance indices WI and PRI
Carbon isotope composition of leaves can be measured to determine the carbon isotopic discrimination, Δ 13 C, during photosynthesis. In turn, Δ 13 C relates to A / g t , the ratio of CO 2 assimilation rate to the total conductance to diffusion of CO …
view (represented, for example, by Farquhar et al., 1989 and Mook, 2000), the ‰ symbol implies the factor of 1000 and we can equivalently write either δ = -25‰ orAn isotopic signature (also isotopic fingerprint) is a ratio of non-radiogenic ‘stable isotopes’, stable radiogenic isotopes, or unstable radioactive isotopes of particular elements in an investigated material.
Carbon isotope discrimination theory For C 3 plants, carbon isotope discrimination (A) is related to inte- grated A/E, because A and AlE are both in part determined by Ci/C a.
Theoretical models of carbon isotope discrimination occurring during C 4 photosynthesis have shown that CO 2 leakage from the bundle sheath is one of the main factors influencing carbon isotope discrimination during CO 2 uptake (Farquhar, 1983; O’Leary, 1981; Peisker, 1982).
patterns previously reported (Farquhar et al. 1989). Our main interest was in knowing if the sexes dif- fered in long-term potential water-use efficiency, as estimated by carbon isotope discrimination, and if gender differences in physiology could be dependent on the environmental context, as has been suggested for I. aquifolium (Obeso et al. 1998). Assuming results from studies in other
RELATIONSHIP BETWEEN WATER USE EFFICIENCY AND 13C ISOTOPE
PDF On Jun 1, 1989, G.D. Farquhar and others published Carbon isotope discrimination and photosynthesis. Ann Rev Plant Phys Plant Mol Biol
(Farquhar et al. 1989) and plant water-use efficiency (WUE; Farquhar & Richards 1984). Past studies have found that carbon isotope discrimination (Δ) and WUE are tightly related because both parameters depend on stomatal aperture (Farquhar et al. 1982a). This rela- tionship is easily demonstrated in C 3 species (Farquhar & Richards 1984) because of large carbon discrimina-tions …
The aim of this study was to test whether the grain carbon isotope discrimination (Δ) and ash content (ASH) are related to grain yield (GY), protein content (PC) and mean grain weight (MGW) in dry bean.
Atmospheric carbon dioxide and the ratio of intercellular to a

G D Farquhar Google Scholar Citations

In 1982, Farquhar and others developed theory that related W in C3 plants to the level of discrimination against 13 C (A) during CO 2 fixation (Farquhar et a!. 1989).
Carbon isotope discrimination and drought tolerance Tolerance to drought is a quantitative trait, with a complex phenotype, often confounded by plant phenology.
1989). Carbon isotope discrimination (A), a measure of the isotope ratio, of C3 plant leaves is related to photo- synthetic gas exchange; because A is in part determined by c~/ca, the ratio CO2 of concentrations in the leaf inter- cellular spaces to that in the atmosphere (Farquhar et al. 1982a; Farquhar and Richards 1984; Farquhar et al. 1989). This ratio, ci/Ca, differs among plants because
investigate several aspects of carbon isotope exchange between a forest ecosystem and the atmosphere. During the 1998 growing season, the mean photosynthetic discrim-ination against 13 CO 2, by the deciduous forest canopy (∆ canopy), was computed to be 22·4‰, but it varied between 18 and 27‰. On a diurnal basis, the greatest discrimination occurred during the early morning and late
Carbon isotope discrimination ∆ Hubick & Farquhar 1989). WUE is strongly affected by water status during growth. Both decreased water Materials and methods availability and increased vapour pressure deficit cause lower ∆in plant material because of their effects on Plant material stomatal conductance or photosynthetic capacity (Condon et al. 1992). Therefore, from the analysis of
Gender light and water effects in carbon isotope

Ash Carbon Isotope Discrimination and Silicon as
lase/oxygenase during photosynthesis (Farquhar et al., 1989). The physiological basis for the negative correlation between Δ and TE in C 3 plant species is that it estimates the tissue internal leaf substomatal CO 2 to ambient CO 2 concentration integrated over time. A lower internal CO 2 to ambient CO 2 concentration pro-motes higher TE and results in lower Δ. Internal substomatal Carbon
[Farquhar et al., 1989; Ehleringer et al., 1993]. Leaf carbon isotope ratios are particularly useful therefore for examining subtle differences among species or environmental conditions that are difficult to separate using standard gas exchange tech- niques. The analysis of tree-ring carbon isotope ratios in- creases the period of temporal integration and allows the study of historical changes
isotope composition of tissues, Farquhar and Richards (1984) proposed that carbon isotope discrimination (A) be used to identify the biological processes.
Carbon isotope discrimination and xylem D/H ratios in desert plants, p. 489-497. Stable Isotopes in Plant Nutrition, Soil Fertility, and Environmental Studies. IAEA, Vienna. Stable Isotopes in Plant Nutrition, Soil Fertility, and Environmental Studies.
Relationship between carbon isotope discrimination and the ratio of internal partial pressure of carbon dioxide to ambient carbon dioxide, p i /p a, in leaves of the Petford provenance of Eucalyptus camaldulensis on well-watered (closed symbols) and water-limited (open symbols) plants with (+ above symbol) and without applied abscisic acid.
470 von Caemmerer et al. Plant Physiol. Vol. 11 3, 1997 formed lines to examine the effect of a reduction of Rubisco on CO, assimilation, carbon isotope discrimination, and 4.
(Farquhar et al. 1989). heritability of stable carbon isotope discrimination and the genetic correlation of discrimination with third-year growth, in a widely crossed P. taeda pedigree involving 32 parents; (2) to determine whether genetic parameters for growth and stable carbon isotope discrimination were stable across two sites in the lower coastal plain region of Florida and Georgia
(Farquhar et al., 1989). Carbon isotope discrimination positively correlates with Ci/Ca, i.e. the ratio of internal leaf CO2 concentration to ambient CO2 concentration (Farquhar et al., 1982).
Graham Farquhar RSB biology.anu.edu.au
Farquhar GD, O’Leary MH, Berry JA (1982) On the relationship between carbon isotope discrimination and the intercellular carbon-dioxide concentration in leaves. Australian Journal of Plant Physiology 9 , 121–137.
Summary Variable retention harvesting (VRH) has been proposed as a silvicultural practice to maintain biodiversity and ecosystem integrity. No previous study has examined tree carbon isotope discrimination to provide insights into water stress that could lead to dieback and mortality of trees follow-ing VRH. We measured and compared the carbon isotope ra-tios (δ13C) in stem wood of …
Carbon isotope discrimination was the trait most related to grain yield, the coefficient of correlation increasing from the worst (i.e. rainfed) to the best (i.e. irrigation) trials. Key words: Carbon isotope discrimination, canopy temperature, nitrogen content.
Carbon isotope composition (δ 13 C) recorded in tissues of C 3 plants has been demonstrated to be a useful tool for assessing WUE (for a review see Farquhar et al., 1989; Brugnoli and Farquhar, 2000).
Carbon isotope discrimination appears to be influenced by transpiration (providing information on leaf evaporative enrichment), but the results did not provide a clear way to interpret such variation.
S. CAO et al. 500 to produce it or the ratio of net photosynthesis to stomatal conductance over a period of seconds or minutes) in C3 species (Farquhar 1982, 1989, Farquhar and et al.

FUNCTIONAL PLANT BIOLOGY Earth & Planetary Sciences

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Effects of environmental salinity on carbon isotope
The Application of Carbon Isotope Discrimination in Cereal
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Carbon isotope discrimination at vegetative stage as an

Variation and inheritance of carbon isotope discrimination