Studies on nuclear degeneration during programmed cell death of synergid   and antipodal cells in Triticum aestivum

doi:10.1007/s00497-004-0220-1

CORC > 北京大学 > 生命科学学院

	Studies on nuclear degeneration during programmed cell death of synergid and antipodal cells in Triticum aestivum
	An, LH ; You, RL
刊名	有性植物繁殖
	2004
关键词	Triticum aestivum synergid antipodal cells programmed cell death nuclear degeneration ACONITUM-VULPARIA RCHB EMBRYO SAC NICOTIANA-TABACUM ENDOPOLYPLOID ANTIPODALS COTTON EMBRYOGENESIS POLLEN-TUBE FERTILIZATION ULTRASTRUCTURE APOPTOSIS ENDOSPERM
DOI	10.1007/s00497-004-0220-1
英文摘要	Morphological changes in the nuclear degeneration of the synergid ( mainly the synergid that receives the pollen tube) and antipodal cells in Triticum aestivum were studied. Although located in the same embryo sac, and derived from the same megaspore, nuclear degeneration of the synergid and antipodal cells differs greatly. Nuclear degeneration in the synergid is characterized by pycnosis, i.e., total chromatin condensation, nuclear deformation and distinct shrinkage in volume, followed by the formation of an irregular and densely stained mass - the degenerated nucleus - while the nucleolus disappears prior to the degradation of chromatin. In contrast, in the nuclear degeneration of antipodal cells, chromatin is only partly condensed and the nuclear volume changes only slightly after the distinct chromatin condensation. Chromatolysis then occurs, i.e., stainable contents disappear while the nuclear envelope is retained. The nucleoli persist after the disappearance of the chromatin. The possible functions of nuclear degeneration of synergid and antipodal cells are discussed, especially with respect to the guidance of pollen tube growth and the proliferation of free-nuclear endosperm. The degeneration of synergids and antipodal cells in T. aestivum are distinct forms of programmed cell death, regarded as cytoplasmic cell death and nuclear degradation in advance of cell death, respectively.; Plant Sciences; Reproductive Biology; SCI(E); 0; ARTICLE; 4; 195-201; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/254583]
专题	生命科学学院
推荐引用方式 GB/T 7714	An, LH,You, RL. Studies on nuclear degeneration during programmed cell death of synergid and antipodal cells in Triticum aestivum[J]. 有性植物繁殖,2004.
APA	An, LH,&You, RL.(2004).Studies on nuclear degeneration during programmed cell death of synergid and antipodal cells in Triticum aestivum.有性植物繁殖.
MLA	An, LH,et al."Studies on nuclear degeneration during programmed cell death of synergid and antipodal cells in Triticum aestivum".有性植物繁殖 (2004).