云南农业大学学报（自然科学）2018，Vol.33Issue(5)：779-782,4.DOI:10.12101/j.issn.1004-390X(n).201805064
地椒小孢子发生和雄配子体发育
Microsporogenesis and Male Gametogenesis of Thymus quinquecostatus
摘要
Abstract
[Purposes]In the present investigation, we aimed to accumulate embryological data of Lamiaceae, to provide embrilological evidence on clarification of the systematic position of Thymus, and to provide base data on the introduction and cultivation of Thymus quinquecostatus.[Methods]Conventional paraffin method was used.[Results]Each anther has four sporangia. Development of the anther wall belongs to the dicotyledonous type and the anther wall comprises of epidermis, endothecium, one middle layer, and the tapetum. The cell wall of endothecium and part of connective tissue cells have fibrous thickening. The cells of glandular tapetum were 2-nucleate. Cytokinesis of the microspore mother cell is simultaneous, resulting in the tetrahedral tetrad. The mature pollen grain is 3-celled and hexacolpate. Pollen abortion is common.[Conclusions]The characteristics of microsporogenesis and male gametogenesis of T. quinquecostatus, especially the 3-celled and hexacolpate mature pollen grain support moving Thymus from Lamioideae to Nepetoideae in molecular systematic classifications. Pollen abortion maybe is one of the factors leading to low seed setting rate.关键词
地椒/小孢子发生/花粉粒发育/花粉败育Key words
Thymus quinquecostatus/microsporogenesis/male gametogenesis/pollen abortion分类
农业科技引用本文复制引用
王艳杰,任文秀,孔冬瑞..地椒小孢子发生和雄配子体发育[J].云南农业大学学报（自然科学）,2018,33(5):779-782,4.基金项目
鲁东大学博士启动基金(LY2015014). （LY2015014）
