DNA fragmentation is regulated by ethylene during carpel senescence in Pisum sativum

被引：138

作者：

Orzaez, D ^{[1
]}

Granell, A ^{[1
]}

机构：

[1] UNIV POLITECN VALENCIA, CSIC, INST BIOL MOL & CELULAR PLANTAS, DEPT BIOL DESARROLLO, E-46022 VALENCIA, SPAIN

来源：

PLANT JOURNAL | 1997年 / 11卷 / 01期

关键词：

D O I：

10.1046/j.1365-313X.1997.11010137.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Treatment of the pea carpel with the ethylene action inhibitors, silver thiosulphate and 2,5-norbornadiene, retarded its senescence and extended the growth time in which the unpollinated carpel was able to respond to gibberellins. Cells of the senescent carpel have characteristics of apoptotic cells, such as nuclei condensation and internucleosomal DNA fragmentation. Both DNA laddering and condensed nuclei can be prevented by the use of the ethylene action inhibitors, while ethylene treatment accelerates DNA fragmentation. It is postulated that ethylene produced by the flower after anthesis determines the fate of the ovary/ovule; in other words, if the ovary receives no additional stimulus (pollination or gibberellin treatment), it undergoes a senescence process, with some cells showing characteristics similar to those of programmed cell death already identified in animal systems.

引用

页码：137 / 144

页数：8

共 32 条

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