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黄杉种子休眠解除过程中脱落酸含量及胚对(+)-脱落酸敏感性的变化

Changes in abscisic acid content and embryo sensitivity to (+)-abscisic acid during the termination of dormancy of yellow cedar seeds.

作者信息

Schmitz N, Abrams S R, Kermode A R

机构信息

Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.

出版信息

J Exp Bot. 2000 Jun;51(347):1159-62. doi: 10.1093/jexbot/51.347.1159.

DOI:10.1093/jexbot/51.347.1159
PMID:10948243
Abstract

Yellow cedar seeds are dormant at maturity. The abscisic acid (ABA) content of the embryo (but not the megagametophyte) decreased approximately 2-fold following exposure of seeds to a dormancy-breaking treatment; this process was also accompanied by a 10-fold lowered sensitivity of the embryo to S:-(+)-ABA. A decline in ABA within the seed is not sufficient for dormancy breakage; reduced embryo sensitivity to ABA is also required.

摘要

黄杉种子成熟时处于休眠状态。种子经打破休眠处理后，胚（而非雌配子体）中的脱落酸（ABA）含量下降了约2倍；此过程还伴随着胚对S-（+）-ABA的敏感性降低了10倍。种子内ABA含量的下降不足以打破休眠；还需要胚对ABA的敏感性降低。

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Dormancy termination of western white pine (Pinus monticola Dougl. Ex D. Don) seeds is associated with changes in abscisic acid metabolism.美国西部白松（Pinus monticola Dougl. Ex D. Don）种子的休眠终止与脱落酸代谢的变化有关。
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