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Water status and yield of sunflowers (Helianthus annuus) subjected to water stress during four stages of development

Published online by Cambridge University Press:  27 March 2009

N. Sionit
N. Sionit
Affiliation:
Department of Irrigation, College of Agriculture, Pahlavi University, Shiraz, Iran
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Summary

The effects on seed yield of two levels of water stress at four stages of development were investigated in two varieties of sunflower, Krasnodarets and Record. The plants were grown from seed in large pots in an air-conditioned glasshouse at 26/20 °C and 70% relative humidity, with natural summer illumination. They were subjected to water stress before head formation, during head formation, during flowering, and during seed development.

The leaf water potential of plants subjected to a water stress of – 16 bars returned to normal after rewatering, but plants subjected to – 23 bars did not return to their prestress level and some leaves died. A water stress of – 16 bars caused no significant reduction in dry weight of the vegetative structures, but stress at all stages of growth reduced seed yield. A water stress of – 23 bars reduced both total dry weight and seed yield at all stages of growth, seed yield being reduced more by a stress of – 23 bars than of – 16 bars. Oil content was slightly reduced by water stress.

Water stress during anthesis reduced sunflower seed yield more than during later stages of development.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 89 , Issue 3 , December 1977 , pp. 663 - 666
Copyright
Copyright © Cambridge University Press 1977

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References

Boyer, J. S. (1971). Recovery of photosynthesis in sunflower after a period of low leaf water potential. Plant Physiology 47, 816–20.CrossRefGoogle ScholarPubMed
Doss, B. D., Pearson, R. W. & Rogers, H. T. (1974). Effect of soil water stress at various growth stages on soybean yield. Agronomy Journal 66, 297–9.CrossRefGoogle Scholar
Kramer, P. J. (1950). Effects of wilting on the subsequent intake of water by plants. American Journal of Botany 37, 281–4.CrossRefGoogle Scholar
Kramer, P. J. (1963). Water stress and plant growth. Agronomy Journal 55, 31–5.CrossRefGoogle Scholar
Kramer, P. J., Hellmers, H. & Downs, R. J. (1970). SEPEL: new phytotrons for environmental research. BioScience 20, 1201–8.CrossRefGoogle Scholar
Lewis, R. B., Hiler, E. A. & Jordan, W. R. (1974). Susceptibility of grain sorghum to water deficit at three growth stages. Agronomy Journal 66, 589–90.CrossRefGoogle Scholar
Sionit, N. & Kramer, P. J. (1977). Effect of water stress during different stages of growth of soybean. Agronomy Journal 69, 274–8.CrossRefGoogle Scholar
Sionit, N. & Patterson, D. T. (1977). Rapid estimation of sunflower leaf area from linear measurements. Iranian Journal of Agricultural Research 5 (in the Press).Google Scholar
Wiebe, H. H., Campbell, G. S., Gardner, W. H., Rawlins, S. L., Cary, J. W. & Brown, R. W. (1971). Measurement of plant and soil water status. Utah Agricultural Experiment Station Bulletin, no. 484.Google Scholar