Floral development in bolting garlic
Floral development in bolting garlic
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DOI：
10.1007/s004970000061
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发表时间：
2001-02-01
影响因子：
--
通讯作者：
Rabinowitch, HD
中科院分区：
文献类型：
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作者：
Kamenetsky, R;Rabinowitch, HD
大蒜(Allium Sativum L.)是一种完全不育的植物，只能无性繁殖。本研究的目的是利用扫描电子显微镜研究以色列大蒜基因库中的一些抽苔大蒜材料在花芽分化和发育过程中的形态过程。大蒜花序是一种伞形花序，其分枝(花簇)来自共同的分生组织。众多的花具有典型的洋葱属的独特的形态。花柄伸长先于顶端分生组织的膨大，并将其细分为几个花发育中心。在簇内，花原基发育不均匀。顶穗的分化始于顶端外周部分的花分化，顶端的大小、数目和发育速度因基因型而异。在所研究的12个无性系中，至少有4个花冠比不同的形态类型被区分开来。为了进一步研究开花生理和育性恢复，应选择顶端分生组织中能分化出最大比例的正常花和最少顶端结实的无性系。
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.