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Tuber formation in yam (Dioscorea spp.): effect of moisture stress; contribution of the parent sett

Published online by Cambridge University Press:  27 March 2009

I. C. Onwueme
I. C. Onwueme
Affiliation:
Plant Science Department, University of Ife, Ile-Ife, Nigeria
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Summary

Setts of water yarn (Dioscorea alata) weighing 75 g each were pre-sprouted in sawdust and then grown in soil. The plants were subjected to moisture stress by withholding water from day 15 to 35, or day 36 to 56 or by watering only once every 14 days. In all cases, tuber initiation was delayed, the greatest delay being in the plants that were watered once every 14 days.

Some setts of D. rotundata that were placed in moist sawdust were seen to produce new tubers without their shoots emerging above the sawdust level. This was taken to indicate that some of the photosynthate in the sett was being transferred into the new tuber. This could offer a partial explanation for the greater tuber yield that results from larger setts.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 85 , Issue 2 , October 1975 , pp. 267 - 269
Copyright
Copyright © Cambridge University Press 1975

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References

REFERENCES

Burt, R. L. (1964). Influence of short periods of low temperature on tuber initiation in potato. European Potato Journal 7, 197–208.CrossRefGoogle Scholar
Coursey, D. G. (1967). Yams. London: Longmans.Google Scholar
Gupalo, P. I. (1961). A physiological basis for accelerating development and obtaining an early harvest of potato tubers. Ukranian Botanical Journal 18, 13–21.Google Scholar
Miege, J. (1957). Influence de quelques caractères des tubercules semances sur la levèe et le rendement des ignames cultivés. Journal d'Agriculture Tropicale et de Botanique appliqué 4, 315–42.CrossRefGoogle Scholar
Onwueme, I. C. (1972). Influence of the weight of the planted tuber on the vegetative performance of white yam (Dioscorea rotundata Poir) plants. Nigerian Agricultural Journals, 9 170–3.Google Scholar
Schreven, D. A. Van (1956). On the physiology of tuber formation in potatoes. I. Premature tuber formation. Plant and Soil 8, 49–55.CrossRefGoogle Scholar