银杏胚珠贮粉室的早期发育(英文)

doi:10.3321/j.issn:1672-9072.2002.07.001

CORC > 北京大学 > 生命科学学院

	银杏胚珠贮粉室的早期发育(英文); Early development of pollen chamber in Ginkgo biloba ovule
	李大辉 ; 杨雄 ; 崔旭 ; 崔克明 ; 李正理
刊名	植物学报
	2002
关键词	银杏贮粉室发育细胞程序性死亡 Ginkgo biloba pollen chamber development programmed cell death (PCD)
DOI	10.3321/j.issn:1672-9072.2002.07.001
英文摘要	对银杏 (GinkgobilobaL .)胚珠贮粉室的早期发育过程以及珠心细胞死亡的细胞学机制进行了研究。DNA电泳出现DNAladder和TUNEL标记说明参与形成贮粉室的珠心细胞死亡是程序性死亡 (PCD)过程 ,并且显示出在贮粉室形成中 ,PCD的发生有一定的空间分布式样。结合扫描电镜观察 ,贮粉室的早期发育可分为 4个阶段 :起始事件是位于珠孔端的 3至 4层珠心细胞纵向伸长 ;接着 ,位于珠心组织最上部 (珠孔端 )的珠心细胞启始死亡 ;然后 ,这些已经纵向伸长的珠心细胞向基地和侧向地逐渐死亡 ,形成一个空腔 ;最后 ,珠孔端珠心表皮细胞以开裂的方式与其余表皮细胞脱离而形成贮粉室的开...; The early stage of pollen chamber development in ovule and the cytological mechanism of nucellar cell death were studied in Ginkgo biloba L, DNA ladder appearance and TUNEL assay demonstrated that the nucellar cell death, doomed to bring about pollen chamber formation, was a process of programmed cell death (PCD). A spatial distribution of PCD was visualized during the development of pollen chamber. Together with the observation under the scanning electron microscope, these results have revealed that the early developmental pattern of pollen chamber consists of four phases. Firstly, several layers of the nucellar cells at the micropylar end elongate longitudinally. Thereafter, the uppermost layer of the nucellar cells at the micropylar end initiate PCD; and the nucellar cell death extends in a basally and laterally oriented direction to form a cavity. Finally, the epidermal cells at the micropylar end detach from the other epidermis by dehiscence, bringing about the opening of the pollen chamber. The early development of pollen chamber begins sometime after the stage of megasporocyte and continues by the time of the formation of megaspore tetrad, and finally completes at the stage of development of female gametophyte. This shows a synchronous development of megaspore and pollen chamber.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000177116900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中国科学引文数据库(CSCD); 3; 07; 757-763; 44
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/45832]
专题	生命科学学院
推荐引用方式 GB/T 7714	李大辉,杨雄,崔旭,等. 银杏胚珠贮粉室的早期发育(英文), Early development of pollen chamber in Ginkgo biloba ovule[J]. 植物学报,2002.
APA	李大辉,杨雄,崔旭,崔克明,&李正理.(2002).银杏胚珠贮粉室的早期发育(英文).植物学报.
MLA	李大辉,et al."银杏胚珠贮粉室的早期发育(英文)".植物学报 (2002).