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学科主题: 药学
题名:
Morphological changes in nucellar cells undergoing programmed cell death (PCD) during pollen chamber formation in Ginkgo biloba
作者: Li, DH1; Yang, X1; Cui, KM1; Li, ZL1
关键词: Ginkgo biloba ; nucellar cell ; pollen chamber ; programmed cell death (PCD)
刊名: ACTA BOTANICA SINICA
发表日期: 2003
卷: 45, 期:1, 页:53-63
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
研究领域[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
关键词[WOS]: RAPE BRASSICA-NAPUS ; POD DEHISCENCE ; POLYGALACTURONASE ; EXPRESSION ; FRUIT ; ABSCISSION
英文摘要:

Programmed cell death (PCD) of the nucellar cells at the micropylar end is involved in pollen chamber morphogenesis in Ginkgo biloba L. A development-course observation of the morphological changes in the nucellar cells undergoing PCD to form pollen chamber was performed. During the PCD, the nucellar cells degraded their cellular components through an orderly progression. Through the vactiolation, the cytosol was engulfed by the enlarging vacuole, leaving out various organelles, which remained morphologically integrated. As the vacuolation continued, the vacuole collapsed with the breakage of the tonoplast and the cytosol disappeared completely. Organelles were subsequently destroyed. Ultimately, nucellar cells digested away all of their cytoplasm, leaving with cell walls. They became collapsed as the nucellus developed. Intracellular membranes were strikingly changed, playing a role in leading to cell death. Some of these noticeable changes were the appearance of multivesicular body, multicycle-like membranes, membrane-bounded bodies containing some organelles, tonoplast rupture and numerous vesicles. The dehiscence of the apical epidermis, resulting in the opening, appeared to have followed two different pathways with one involving a specific epidermal cell autolysis and the other by detachment from middle lamella of two neighboring epidermal cells without cell autolysis. The specific epidermal cells had been dead prior to the dehiscence of the apical epidermis, which marked the sites of the dehiscence followed. In view of the changes in the cellular morphology, a process of nucellar cell PCD in the course of the pollen chamber formation was demonstrated.

语种: 英语
WOS记录号: WOS:000180476600007
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/50182
Appears in Collections:北京大学药学院_期刊论文

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作者单位: 1.Peking Univ, Coll Life Sci, Beijing 100871, Peoples R China
2.Peking Univ, Sch Pharmaceut Sci, Beijing 100083, Peoples R China

Recommended Citation:
Li, DH,Yang, X,Cui, KM,et al. Morphological changes in nucellar cells undergoing programmed cell death (PCD) during pollen chamber formation in Ginkgo biloba[J]. ACTA BOTANICA SINICA,2003,45(1):53-63.
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