雷竹大孢子发生与雌配子体发育  

Megasporogenesis and Female Gametophytes Development of Phyllostachys violascens

作　　者：林新春[1] 袁晓亮[1] 林绕[1] 娄永峰[1] 方伟[1] 

机构地区：[1]浙江林学院亚热带森林培育国家重点实验室培育基地,临安311300

出　　处：《林业科学》2010年第5期55-57,I0001,共4页Scientia Silvae Sinicae

基　　金：国家科技部星火计划重点项目(2007EA700002);国家自然科学基金项目(30471416);浙江省自然科学基金项目(Y304345)

摘　　要：利用常规石蜡切片技术对雷竹大孢子发生与雌配子体发育的过程进行研究。结果表明:雷竹单子房,子房1室,内具1个倒生胚珠;双珠被,厚珠心;大孢子母细胞由1个雌性孢原细胞直接发育而成,大孢子四分体呈线型;蓼型胚囊,成熟胚囊包括1个卵细胞、2个助细胞、2个极核组成的中央细胞以及多个反足细胞,助细胞具明显丝状器。雌配子体发育多数正常,不是造成雷竹结实率低的主要原因。Megasporogenesis and female gametophyte development of Phyllostachys violascens were studied by classical paraffin microtome techniques. The observed results are as followed： There is a simple ovary,which is unilocular and uniovulate,in one floret. The ovule is anatropous,bitegminous and crassinucellate. The megasporocyte undergoes meiotic division to form linear megaspore tetrad. The embryo sac is polygonum type,including one egg cell,two synergid cells with evident filiform apparatus,one central cell consisting of two polar nuclei,and numerous antipodal cells. The development of the most female gametophyte is normal,which is not the main reason of low seed setting rate of P. violascens.

关 键 词：雷竹 大孢子发生 雌配子体 结实率 

分 类 号：S718.47[农业科学—林学]