Seed dormancy and the control of germination

被引:2227
作者
Finch-Savage, William E.
Leubner-Metzger, Gerhard [1 ]
机构
[1] Univ Warwick, Warwick HRI, Warwick CV35 9EF, England
[2] Univ Freiburg, Inst Biol 2, D-79104 Freiburg I Br, Germany
关键词
D O I
10.1111/j.1469-8137.2006.01787.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Seed dormancy is an innate seed property that defines the environmental conditions in which the seed is able to germinate. It is determined by genetics with a substantial environmental influence which is mediated, at least in part, by the plant hormones abscisic acid and gibberellins. Not only is the dormancy status influenced by the seed maturation environment, it is also continuously changing with time following shedding in a manner determined by the ambient environment. As dormancy is present throughout the higher plants in all major climatic regions, adaptation has resulted in divergent responses to the environment. Through this adaptation, germination is timed to avoid unfavourable weather for subsequent plant establishment and reproductive growth. In this review, we present an integrated view of the evolution, molecular genetics, physiology, biochemistry, ecology and modelling of seed dormancy mechanisms and their control of germination. We argue that adaptation has taken place on a theme rather than via fundamentally different paths and identify similarities underlying the extensive diversity in the dormancy response to the environment that controls germination.
引用
收藏
页码:501 / 523
页数:23
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