- AG Condon, GD Farquhar, RA Richards. Genotypic variation in carbon isotope discrimination and transpira-
tion efficiency in wheat. Leaf gas exchange and whole plant studies. Aust J Plant Physiol 17:9–22, 1990. - GC Wright, KT Hubick, GD Farquhar. Discrimination in carbon isotopes of leaves correlates with water use
efficiency of field grown peanut cultivars. Aust J Plant Physiol 15:815–825, 1988. - DH Wallace, JL Ozbun, HM Munger. Physiological genetics of crop yield. Adv Agron 24:97–146, 1972.
- AS Bhagsari, RH Brown. Photosynthesis of peanut (Arachis) genotypes. Peanut Sci 3:1–9, 1976.
- GM Dornhoff, RM Shibles. Leaf morphology and anatomy in relation to CO 2 exchange rate of soybean leaves.
Crop Sci 16:377–381, 1976. - JB Passioura. The effect of root geometry on the yield of wheat growing on stored water. Aust J Agric Res
23:745–752, 1972. - M Gallardo, J Eastham, PJ Gregory, NC Turner. A comparison of plant hydraulic conductances in wheat and
lupins. J Exp Bot 47:233–239, 1996. - RA Richards, JB Passioura. Seminal root morphology and water use of wheat. I. Environmental effects. Crop
Sci 21:249–252, 1981. - RA Richards, JB Passioura. Seminal root morphology and water use of wheat. II. Genetic variation. Crop Sci
21:253–255, 1981. - GC Wright, KT Hubick, GD Farquhar, RC Nageswara Rao. Genetic and environmental variations in transpi-
ration efficiency and its correlation with carbon isotope discrimination and specific leaf area in peanut. In: JE
Ehleringer, AE Hall, GD Farquhar, eds. Stable Isotopes and Plant Carbon-Water Relations. New York: Aca-
demic Press, 1993, pp 247–267. - NL Klocke, DF Heermann, HR Duke. Measurement of evaporation and transpiration with lysimeters. Trans
ASAE 28:183–189, 1985. - RJ Hanks, HR Gardner, RL Florian. Plant growth-evapotranspiration relations for several crops in the central
great plains. Agron J 61:30–34, 1969. - TA Howell, KR Davis, RL McCormick, H Yamada, VT Walhood, DW Meek. Water-use efficiency of narrow
leafed cotton. Irrig Sci 5:195–204, 1984. - RJ Hanks. Crop coefficients for transpiration. Advances in Evapotranspiration. St. Joseph, MI: ASAE, pp
431–438, 1985. - RJ Lascane, CHM van Bavel, JL Hatfield, DR Upchurch. Energy and water balance of a sparse crop: simulated
and measured soil and crop evaporation. Soil Sci Am J 51:113–1121, 1987. - ME Bloodworth, JB Page, WR Cowley. A thermoelectric method for determining the rate of water movement
in plants. Soil Sci Soc Am Proc 19:411–414, 1955. - T Sakuratini. Improvement of the probe for measuring water flow rate in intact plants with the stem heat bal-
ance method. Agric Meteorol 40:273–277, 1984. - JM Baker, CHM van Bavel. Measurement of mass flow of water in stems of herbaceous plants. Plant Cell En-
viron 10:779–782, 1987. - JR Evans, TD Sharkey, JA Berry, GD Farquhar. Carbon isotope discrimination measured concurrently with gas
exchange to investigate CO 2 diffusion in leaves of higher plants. Aust J Plant Physiol 13:281–292, 1986. - AB Frank, RE Barker, JD Berdahl. Water-use efficiency of grasses grown under controlled and field condi-
tions. Agron J 79:541–544, 1987. - TR Sinclair, CB Tanner, JM Bennett. Water use efficiency in crop production. Bioscience 34:36–40, 1983.
- B Martin, YR Thorstenson. Stable carbon isotope composition (^13 C), water use efficiency, and biomass pro-
ductivity of Lycopersicon esculentum,L.pennelli, and their F 1 hybrid. Plant Physiol 88:213–217, 1988. - HG Jones. Breeding for stomatal characteristics. In: E Ziegler, GD Farquhar, IR Cowan, eds. Stomatal Func-
tion. Stanford: Stanford University Press, 1984 (cited in Ref. 24). - AM Ismail, AE Hall. Correlation between water use efficiency and carbon isotope discrimination in diverse
cowpea genotypes and isogenic lines. Crop Sci 32:7–12, 1992. - RD Guy, MF Fogel, JA Berry, TC Hoering. Isotope fractionation during oxygen production and consumption
by plants. In: J Biggins, ed. Progress in Photosynthetic Research. III. Dordrecht: Martinus Nijhoff, 1987, pp
597–600. - GD Farquhar, MH O’Leary, JA Berry. On the relationship between carbon isotope discrimination and the in-
tercellular carbon dioxide concentration in leaves. Aust J Plant Physiol 9:121–137, 1982. - JH Troughton. ^13 C as an indicator of carboxylation reactions. In: M. Gibbs, E. Latzko, eds. Photosynthesis II,
Photosynthetic Carbon Metabolism and Related Processes. Berlin: Springer-Verlag, 1979, pp 140–149. - WG Mook, M Koopmans, AF Carter, CD Keeling. Seasonal, latitudinal and secular variations in the abundance
of isotopic ratios of atmospheric carbon dioxide. I. Results from land stations. J Geophys Res 88:10915–10933,
1983. - CB Tanner, TR Sinclair. Efficient water use in crop production: research or re-search? In: H Taylor, WR Jor-
dan, TR Sinclair, eds. Limitations to Efficient Water Use in Crop Production. Madison, WI: American Society
of Agronomy, 1983, pp 1–28. - H Craig. Carbon-13 in plants and the relationship between carbon-13 and carbon-14 variations in nature. J Geol
62:115–149, 1954. - KT Hubick, GD Farquhar. Carbon isotope discrimination and the ratio of carbon gained to water lost in barley
cultivars. Plant Cell Environ 12:795–804, 1989.
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