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.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2010年第4期68-71,75,共5页
Journal of South China Agricultural University
基金
广东省林业局科技项目(2006-14)
关键词
杜鹃红山茶
大小孢子
雌雄配子体发育
山茶科
Camellia changii
microspore and megaspore
development of the gametophytes
Theaceae
