Association of dwarfism and floral induction with a grape 'green revolution' mutation
Association of dwarfism and floral induction with a grape 'green revolution' mutation
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DOI：
10.1038/416847a
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发表时间：
2002-04-25
期刊：
影响因子：
64.8
通讯作者：
Thomas, MR
中科院分区：
文献类型：
--
作者：
Boss, PK;Thomas, MR
植物从营养生长向生殖生长的转变是植物生活史中一个必不可少的过程。植物成花诱导途径对环境和内源线索都有反应，通过对拟南芥(1，2)突变体的研究，已经了解了许多关于这些遗传途径的知识。赤霉素(GAs)是植物生长调节剂，在植物生长的许多方面都很重要，在拟南芥中，它们促进开花(3-5)。在这里，我们提供了气体抑制葡萄开花的遗传证据。来自香槟品种Pinot Meunier的L1细胞层的葡萄矮化突变体沿着通常形成卷须的枝条长度产生花序。与表型相关的突变基因是小麦‘绿色革命’基因Reduced Height-1的同源基因(Ref.6)和拟南芥GA不敏感基因(Gai)(7)。突变体中卷须向花序的转化表明，葡萄卷须是一种被GAs抑制完成花发育的修饰花序。
The transition from vegetative to reproductive growth is an essential process in the life cycle of plants. Plant floral induction pathways respond to both environmental and endogenous cues and much has been learnt about these genetic pathways by studying mutants of Arabidopsis(1,2). Gibberellins (GAs) are plant growth regulators important in many aspects of plant growth and in Arabidopsis they promote flowering(3-5). Here we provide genetic evidence that GAs inhibit flowering in grapevine. A grapevine dwarf mutant derived from the L1 cell layer of the champagne cultivar Pinot Meunier produces inflorescences along the length of the shoot where tendrils are normally formed. The mutated gene associated with the phenotype is a homologue of the wheat 'green revolution' gene Reduced height-1 (ref. 6) and the Arabidopsis gene GA insensitive (GAI)(7). The conversion of tendrils to inflorescences in the mutant demonstrates that the grapevine tendril is a modified inflorescence inhibited from completing floral development by GAs.