机构地区: 华南农业大学林学院
出 处: 《华南农业大学学报》 2010年第4期68-71,75,共5页
摘 要: 应用石腊切片法,研究了杜鹃红山茶Camellia changii的大小孢子发生及雌雄配子体的发育过程.结果显示,杜鹃红山茶具四囊型花药,腺质绒毡层;药壁发育为基本型;小孢子发育为同时型;小孢子四分体四面体形;花粉粒成熟时具二细胞;胚囊发育属双孢八核葱型,具倒生胚珠,双珠被,薄珠心.显微结构检测结果揭示,自然居群的杜鹃红山茶胚珠败育率达39.4%,这可能是导致自然居群结果量少的主要原因之一. The genesis of megaspore and microspore and the formation of female and male gametophytes in Camellia changii were investigated with the technique of paraffin section.The results were as follows:The anther was 4-sporangia with glandular tapetum;The anther wall formation conformed to the basic type;The cytokinesis of the microspore mother cells was simultaneous;The tetrads were tetrahedral;The mature pollen grains were two-celled.The development of embryo sac was bisporic,8-nucleate,Allium type;The mature ovules were anatropous with dual-integument and tenuinucellate.The abortion rate of the examined ovules was 39.4%,which may be one of the main reasons causing low fruit production of the natural population.
领 域: [生物学]