The male determinant of self-incompatibility in Brassica
The male determinant of self-incompatibility in Brassica
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DOI：
10.1126/science.286.5445.1697
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发表时间：
1999-11-26
期刊：
影响因子：
56.9
通讯作者：
Nasrallah, JB
中科院分区：
文献类型：
--
作者：
Schopfer, CR;Nasrallah, ME;Nasrallah, JB
在芸苔属S基因座控制的自交不亲和系统中，柱头表皮细胞对自交相关花粉的识别导致花粉管发育受到抑制。该识别反应的雌性（柱头）决定子是在5位点编码的多态性跨膜受体蛋白激酶。另一个高度多态性的花药表达基因，SCR，也在5位点编码，满足假设的花粉决定因素的要求。功能丧失和功能获得的研究证明，SCR基因的产品是必要的和足够的确定花粉自交不亲和性的特异性，可能作为一个配体的柱头受体。
In the S locus-controlled self-incompatibility system of Brassica, recognition of self-related pollen at the surface of stigma epidermal cells leads to inhibition of pollen tube development. The female (stigmatic) determinant of this recognition reaction is a polymorphic transmembrane receptor protein kinase encoded at the 5 Locus. Another highly polymorphic, anther-expressed gene, SCR, also encoded at the 5 locus, fulfills the requirements for the hypothesized pollen determinant. Loss-of-function and gain-of-function studies prove that the SCR gene product is necessary and sufficient for determining pollen self-incompatibility specificity, possibly by acting as a Ligand for the stigmatic receptor.