ISHS Acta Horticulturae 167: II Symposium on Growth Regulators in Floriculture
EFFECTS OF BA AND GA3 ON SPROUTING OF ACHIMENES RHIZOMES |
| Author: | J.C. Vlahos |
| Abstract:
Apical and basal halves of Achimenes rhizomes, cv English Waltz, were soaked in four different concentrations of benzyladenine solution for 8, 16 and 24 h. Kept at 25°C in a dark chamber for two weeks, the higher BA concentrations (50 and 100 mg l-1) broke dormancy and enhanced sprouting in both rhizome halves. In an other trial, rhizomes of cv Viola Michelssen were similarly treated in 50 mg l-1 GA3 and placed at four different temperatures under continuous light and/or darkness for 3 weeks. Dormancy was broken by GA3 at 21°C in the dark. In both experiments the apical halves sprouted earlier than the basal ones. GA3 and temperature pretreatment significantly influenced height, number of leaf whorls and flowers in plants developed from treated rhizomes, growing at 21°C and 16 h light, for 22 weeks (5 months). | |
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