Summary
Cultivars of winter wheat (Triticum aestivum L. em. Thell.), considered by wheat breeders to be drought sensitive or drought resistant, were grown under two irrigation regimes (daily or weekly waterings) to determine physiological responses to drought and to evaluate methods to use in screening for drought resistance. Leaf water potential, stomatal resistance, plant resistance to water flow, and soil water potential were measured for three weeks on vernalized plants in a growth chamber. When water was lacking, drought-sensitive plants had a lower leaf water potential than did drought-resistant plants. With both daily and weekly waterings, stomatal resistance was higher in drought-resistant plants than in drought-sensitive plants. Plant resistance to water flow, calculated as the difference between the soil water potential and leaf water potential divided by the amount of water used by the plant, was usually higher in drought-resistant plants than in the drought-sensitive plants. The results showed that, when screening for drought resistance, stomatal resistance was a better method to use than determinations of leaf water potential or plant resistance to water flow.
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References
Campbell G. S. & M. D. Campbell, 1974. Evaluation of a thermocouple hygrometer for measuring leaf water potential in situ. Agron. J. 66: 24–27.
Donald C. M., 1968. The breeding of crop ideotypes. Euphytica 17: 385–403.
Fischer R. A., M. Sanchez & J. R. Syme, 1977. Pressure chamber and air flow porometer for rapid field indication of water status and stomatal condition in wheat. Exp. Agric. 13: 341–351.
Gray, F. & M. H. Roozitalab, 1976. Benchmark and key soils of Oklahoma. A modern classification system. Okla. Agric. Exp. Sta. Misc. Pub. 97. 36 p.
Johnson V. A., 1977. The role of wheat in America's future, p. 37–44. In: M. D.Thorne (Ed.) Agronomists and food; contributions and challenges. Amer. Soc. of Agron., Madison, Wis.
Kanemasu E. T., G. W. Thurtell & C. B. Tanner, 1969. Design, calibration and field use of a stomatal diffusion porometer. Plant Physiol. 44: 881–885.
O'Toole J. C. & T. T. Chang, 1978. Drought and rice improvement in perspective. IRRI Res. Paper Ser. No. 14. The Int. Rice Res. Inst., Manila, Philippines. 27 p.
Schlehuber, A. M. & H. C. Young, Jr. 1955. Concho winter wheat. Okla. Agric. Exp. Sta. Bull. B-453. 18 p.
Shimshi D. & J. Ephrat, 1975. Stomatal behavior of wheat cultivars in relation to their transpiration, photosynthesis, and yield. Agron. J. 67: 326–331.
Todd G. W. & D. L. Webster, 1965. Effects of repeated drought periods on photosynthesis and survival of cereal seedlings. Agron. J. 57: 399–404.
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Journal article 3578 of the Agricultural Experiment Station, Oklahoma State University. Work was partially supported by a Grant-in-Aid of Research from Sigma Xi, The Scientific Research Society of North America, to the senior author.
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Adjei, G.B., Kirkham, M.B. Evaluation of winter wheat cultivars for drought resistance. Euphytica 29, 155–160 (1980). https://doi.org/10.1007/BF00037261
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DOI: https://doi.org/10.1007/BF00037261