Regulation of potato tuber dormancy: A review
نویسندگان
چکیده
Dormancy is one aspect of tuber physiological age that begins with potato tuber initiation. During dormancy, biochemical and physiological processes do occur but they do not trigger immediate morphological changes, yet these processes are relevant for the number of sprouts produced after breaking of the dormancy and for the growth vigour of the seed tuber. This review article reports that dormancy is a complex process that depends on genetic background, stage of tuber development, environmental and management conditions during tuber growth and storage. Temperature, water supply, soil fertility and the photoperiod during plant growth are important environmental factors that regulate the sprouting behaviour. Storage temperature and gas composition regulate dormancy breaking. Endogenous as well as exogenous phytohormones are also important. When seed tubers are needed before natural sprouting occurs, it may be necessary to break the dormancy using chemical agents.
منابع مشابه
Physiological and Biochemical Regulation of Dormancy and Sprouting in Potato Tubers (Solanum tuberosum L.)
At harvest, potato (Solanum tuberosum L.) tubers are in a dormant state and do not have the ability to sprout. After harvesting, tuber dormancy is released progressively. This release is accompanied by numerous physiological and biochemical changes, such as carbohydrate hydrolysis and the accumulation of saccharides, which are detrimental to the nutritional and processing qualities of potatoes....
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References 1 Greiner, S. et al. (1999) Ectopic expression of a tobacco invertase inhibitor homolog prevents cold-induced sweetening of potato tubers. Nat. Biotechnol. 17, 708–711 2 Hemberg, T. (1985) Potato rest. In Potato Physiology (Li, P.H., ed.), pp. 353–388, Academic Press 3 Suttle, J.C. (1995) Postharvest changes in endogenous ABA levels and ABA metabolism in relation to dormancy in potat...
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