Molecular aspects of flower senescence and strategies to improve flower longevity

被引：38

作者：

Shibuya, Kenichi ^{[1
]}

机构：

[1] NARO, Inst Vegetable & Floriculture Sci, 2-1 Fujimoto, Tsukuba, Ibaraki 3050852, Japan

来源：

BREEDING SCIENCE | 2018年 / 68卷 / 01期

关键词：

ethylene; flower; programmed cell death; senescence; transcription factor; DIANTHUS-CARYOPHYLLUS L; ETHYLENE RECEPTOR GENE; PROGRAMMED CELL-DEATH; 1-AMINOCYCLOPROPANE-1-CARBOXYLATE SYNTHASE GENE; FLORAL ORGAN SENESCENCE; JAPANESE MORNING GLORY; ONCIDIUM GOWER RAMSEY; FOREVER-YOUNG-FLOWER; MESSENGER-RNA LEVEL; ACC OXIDASE GENES;

D O I：

10.1270/jsbbs.17081

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Flower longevity is one of the most important traits for ornamental plants. Ethylene plays a crucial role in flower senescence in some plant species. In several species that show ethylene-dependent flower senescence, genetic modification targeting genes for ethylene biosynthesis or signaling has improved flower longevity. Although little is known about regulatory mechanisms of petal senescence in flowers that show ethylene independent senescence, a recent study of Japanese morning glory revealed that a NAC transcription factor, EPHEMERAL1 (EPH I), is a key regulator in ethylene-independent petal senescence. EPH1 is induced in an age-dependent manner irrespective of ethylene signal, and suppression of EPHI expression dramatically delays petal senescence. In ethylene-dependent petal senescence, comprehensive transcriptome analyses revealed the involvement of transcription factors, a basic helix-loop-helix protein and a homeodomain-leucine zipper protein, in the transcriptional regulation of the ethylene biosynthesis enzymes. This review summarizes molecular aspects of flower senescence and discusses strategies to improve flower longevity by molecular breeding.

引用

页码：99 / 108

页数：10

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