SHATTERPROOF MADS-box genes control seed dispersal in Arabidopsis
SHATTERPROOF MADS-box genes control seed dispersal in Arabidopsis
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DOI：
10.1038/35008089
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发表时间：
2000-04-13
期刊：
影响因子：
64.8
通讯作者：
Yanofsky, MF
中科院分区：
文献类型：
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作者：
Liljegren, SJ;Ditta, GS;Yanofsky, MF
果实介导种子的成熟和传播，是开花植物特有的复杂结构。拟南芥等植物的种子传播是通过一种称为果实开裂或豆荚破碎的过程发生的。尽管控制种子传播在双低油菜籽等农作物中具有农艺价值，但很少有研究(1-3) 关注于识别调节这一过程的基因(4,5)。在这里，我们表明，密切相关的 SHATTERPROOF (SHP1) 和 SHATTERPROOF2 (SHP2) MADS-box 基因是拟南芥果实开裂所必需的。此外，SHP1 和 SHP2 在功能上是冗余的，因为两个突变体都没有表现出新的表型。我们对 shp1 shp2 果实以及组成型表达 SHP1 和 SHP2 的植物的研究表明，这两个基因控制开裂区分化并促进相邻细胞的木质化。我们的结果表明，对果实开裂背后的分子事件的进一步分析可能允许对作物中的豆荚破碎进行遗传操作。
The fruit, which mediates the maturation and dispersal of seeds, is a complex structure unique to flowering plants. Seed dispersal in plants such as Arabidopsis occurs by a process called fruit dehiscence, or pod shatter. Few studies(1-3) have focused on identifying genes that regulate this process, in spite of the agronomic value of controlling seed dispersal in crop plants such as canola(4,5). Here we show that the closely related SHATTERPROOF (SHP1) and SHATTERPROOF2 (SHP2) MADS-box genes are required for fruit dehiscence in Arabidopsis. Moreover, SHP1 and SHP2 are functionally redundant, as neither single mutant displays a novel phenotype. Our studies of shp1 shp2 fruit, and of plants constitutively expressing SHP1 and SHP2, show that these two genes control dehiscence zone differentiation and promote the lignification of adjacent cells. Our results indicate that further analysis of the molecular events underlying fruit dehiscence may allow genetic manipulation of pod shatter in crop plants.