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Dormancy responses to post-harvest application of growth regulators in Dioscorea species. 2. Dormancy responses in ware tubers of D. alata and D. esculenta

Published online by Cambridge University Press:  27 March 2009

Lynda D. Wickham ,
H. C. Passam  and
L. A. Wilson
Lynda D. Wickham
Affiliation:
Department of Crop Science, University of the West Indies, St Augustine, Trinidad
H. C. Passam
Affiliation:
Department of Crop Science, University of the West Indies, St Augustine, Trinidad
L. A. Wilson
Affiliation:
Department of Crop Science, University of the West Indies, St Augustine, Trinidad
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Summary

The effects of post-harvest application of gibberellic acid on dormancy of tubers of Dioscorea alata and D. esculenta were examined. In both species, gibberellic acid extended the dormancy of immature and mature tubers but when GA3 application was made after storage for varying lengths of time, there was a decreasing effect with increased storage time. Dormancy was also reinduced in germinating tubers, that had gone through a normal dormant period, as a result of gibberellic acid treatment. A possible mechanism of dormancy in tropical yams is discussed. It is concluded that use of gibberellic acid as a means of extending the storage life of yam tubers by post-harvest application is a distinct possibility.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 2 , April 1984 , pp. 433 - 436
Copyright
Copyright © Cambridge University Press 1984

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References

Ireland, C. R., Schwabe, W. W. & Couesey, D. G. (1981). The occurrence of batatasins in the Dioscoreaceae. Phytochemistry 20 (7), 1569–1571.CrossRefGoogle Scholar
Hasegawa, K. & Hashimoto, T. (1974). Gibberellininduced dormancy and batatasin content in yam bulbils. Plant and Cell Physiology 15, 1–6.Google Scholar
Martin, F. W. (1977). Prolonging the storage life of yams by removal of shoots and by treatment with gibberellic acid and waxes. Tropical Root and Tuber Crops Newsletter 10, 39–44.Google Scholar
Wickham, L. D., Passam, H. C. & Wilson, L. A. (1984). Dormancy responses to post-harvest application of growth regulators in Dioscorea species. 1. Responses of bulbils, tubers and tuber pieces of three Dioscorea species. Journal of Agricultural Science, Cambridge 102, 427–432.Google Scholar
Wickham, L. D., Wilson, L. A. & Passam, H. C. (1981). Tuber germination and early growth in four edible Dioscorea species. Annals of Botany 47, 87–95.CrossRefGoogle Scholar
Wickham, L. D., Wilson, L. A. & Passam, H. C. (1982). The origin, development and germination of bulbils in two Dioscorea species. Annals of Botany 50, 621–627.CrossRefGoogle Scholar