Seed potato quality as influenced by high temperatures during the growth period. 2. Sprouting pattern in several cultivars in response to storage temperature |
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Authors: | M Susnoschi |
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Institution: | (1) Division of Vegetable Crops, Agricultural Research Organization, The Vulcani Center, Beit Dagan, Israel |
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Abstract: | Summary Locally grown seed tubers of nine varieties developing in spring or in autumn in a semi-arid region were examined for length
of dormancy and for sprouting response. In spring, high temperatures during the last part of tuber development markedly shortened
the dormant periods of tubers in comparison with tubers of the same varieties developing in autumn.
The sprouting behaviour of tubers indicated that it is a varietal characteristic influenced by the change in environmental
conditions during tuber development and storage. On tubers developing in spring and stored at high temperatures, three sprouting
patterns were defined: a) apical dominance, characterized by the evident development of the apical sprout and less than 10%
sprouting of the non-apical buds; b) apical influence, the apical sprout well developed and 10–20% sprouting of the non-apical
buds; and c) simultaneous sprouting of 3 or 4 sprouts of similar size per tuber.
It is suggested that apical dominance is a relative rather than an absolute phenomenon. The extent of dominance depends upon
the variety's response to the high temperatures during tuber growth and storage.
Contribution from the Agricultural Research Organization, Beit Dagan, Israel, 1979 Series, No 301. |
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Keywords: | dormant period apical dormance spring autumn |
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