ISHS Acta Horticulturae 167: II Symposium on Growth Regulators in Floriculture
EFFECTS OF GA3 AND BA ON TWO CULTIVARS OF ACHIMENES LONGIFLORA UNDER TWO LEVELS OF IRRADIANCE |
| Author: | J.C. Vlahos |
| Abstract:
Two cultivars of Achimenes longiflora were placed at 21°C and 16 h of light of two irradiance levels, 22 and 35 W/m2 for 12 weeks, after being sprayed with gibberellic acid (GA3) and benzyladenine (BA). Number of axillary shoots, fresh weight, and number of rhizomes were higher in cultivar Flamenco than in Viola Michelssen. The higher irradiance level increased number of leaf whorls, number of flowers and number of leaf axils that developed more than one flower. Number and fresh weight of rhizomes were also increased at 35 Wm-2. The numbers of leaf whorls was increased by 100 mg l-1 GA3 alone and in combination with 25 mg l-1 BA. Neither GA3 nor BA influenced the total number of flowers while the number of atrophic flowers was increased by high GA3 or BA concentrations. Growth regulator treatments had no carry-over effect on the dormancy and/or sprouting of produced rhizomes. | |
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