Environmental and chemical control of growth and flowering of Chamelaucium uncinatum Schauer |
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Authors: | Ruth Shillo Amram Weiner Abraham H Halevy |
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Institution: | The Hebrew University of Jerusalem, Department of Ornamental Horticulture, P.O.B. 12, Rehovot, 76-100 Israel |
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Abstract: | The main factor affecting floral initiation of Geraldton Wax-Flower (Chamelaucium uncinatum) is the photoperiod, while temperature is the major factor affecting flower development. Four weeks of short days (SD) are generally required for obtaining full flowering. The number of flowers produced per plant increases with increasing the number of SD. Under mild temperatures of (day/night), plants initiated flowers even in long days (LD). However, fewer flowers were produced and on higher nodes as compared to SD plants. Chlormequat promoted flowering under prevailing summer conditions of high temperatures and LD. Under prevailing autumn conditions favourable for flower initiation, LD treatment or weekly sprays with gibberellic acid (GA) reduced the number of flowers per plant. Combined treatment of LD and GA reduced both the flowering percentage and the number of flowers per plant. Discontinuing the LD or the GA treatments caused a resumption of full flower initiation. |
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Keywords: | chlormequat flowering Geraldton Wax-Flower gibberellic acid photoperiod |
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