Floral development in bolting garlic |
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| Authors: | R. Kamenetsky Haim D. Rabinowitch |
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| Affiliation: | (1) Department of Ornamental Horticulture, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel e-mail: rmgold@agri.huji.ac.il Fax: 972-3-9660589, IL;(2) The Hebrew University of Jerusalem, Faculty of Agricultural, Food and Environmental Quality Sciences, Department of Field Crops, Vegetables and Genetics, P.O. Box 12, Rehovot 76100, Israel, IL |
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| Abstract: | Garlic (Allium sativum L.) is a completely sterile plant, propagated only vegetatively. The aim of this research was to study the sequence of morphological processes occurring during floral initiation and development of a number of bolting garlic accessions from the Allium gene bank in Israel by using SEM. The garlic inflorescence is an umbel-like flower arrangement, the branches (flower clusters) of which arise from a common meristem. The numerous flowers have a distinct morphology typical of the genus Allium. Flower-stalk elongation precedes the swelling of the apical meristem and its subdivision into several centers of floral development. Within clusters, floral primordia develop unevenly. Differentiation of topsets begins after floral differentiation on the peripheral part of the apical surface, and their size, number and rate of development vary among genotypes. At least four morphological types differing in flower/topset ratio were distinguished among the 12 clones studied in this investigation. For further studies of flowering physiology and fertility restoration, only clones which can differentiate the greatest proportion of normal flowers and the least of topsets in the apical meristem should be selected. Received: 28 June 2000 / Revision accepted: 6 November 2000 |
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| Keywords: | Allium sativum Allium longicuspis Fertility restoration Florogenesis Topsets Bulblets |
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