Factors Affecting Flower Initiation in the Black CurrantRibes Nigrum(L.)
- 1 January 1970
- journal article
- research article
- Published by Taylor & Francis in Journal of Horticultural Science
- Vol. 45 (3) , 275-282
- https://doi.org/10.1080/00221589.1970.11514355
Abstract
Flower initiation in the black currant shoot begins in the lower middle nodes and then spreads acropetally. There are consistent varietal differences. Initiation occurs only in short days, when extension growth slows down, but in cv. Wellington XXX the critical daylength is relatively long, i.e. approximately 16 h. High temperatures delayed initiation in all daylengths tested. Ripeness-to-flower of shoots depends on the presence of a minimum node number and this overrides the daylength effect; in Wellington XXX, shoots with fewer than 12 nodes cannot be induced to flower. Gibberellic acid treatment inhibits flowering, even in short days, and prolongs vegetative growth.Keywords
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