基于S-核酸酶的自交不亲和性的分子机制  

Molecular Control of S-RNase-based Self-incompatibility

作　　者：张一婧[1] 薛勇彪[1] 

机构地区：[1]中国科学院遗传与发育生物学研究所,北京100080

出　　处：《植物学通报》2007年第3期372-388,共17页Chinese Bulletin of Botany

基　　金：国家自然科学基金(No.30221002)

摘　　要：自交不亲和性是一种广泛存在于显花植物中的种内生殖障碍,可以抑制近亲繁殖而促进异交。其中,以茄科、玄参科和蔷薇科为代表的配子体自交不亲和性是最常见的类型。这类自交不亲和性是由单一的多态性S-位点所控制。目前的研究发现这一位点至少包含两个自交不亲和反应特异性决定因子:花柱中的S-核酸酶和花粉中的SLF(S-LocusF-box)蛋白。该文将主要介绍并讨论基于S-核酸酶的自交不亲和性分子机制的研究进展。To avoid inbreeding and promote out-crossing, many flowering plants have adopted self-incompatibility （SI） systems, through which incompatible （self or genetically related） pollen is recognized and rejected, whereas compatible （non-self） pollen is allowed to grow in the style to deliver the germ calls to the ovary for double fertilization. Among various SI systems, gametophytic SI in Solanaceae, Scrophulariaceae and Rosaceae appears to be the most common whereby the specificity of SI response is controlled by a single polymorphic S-locus. Recent studies have shown that the S-locus is organized in a haplotype fashion and carries at least two genes determining the recognition specificity： S-ribonucleases expressed in the pistil （pistil-S） and S-locus F- box（SLF） genes in the pollen （pollen-S）. Here we discuss recent data on the possible molecular mechanisms eliciting the S-RNasebased self-incompatibility response.

关 键 词：内吞 F-BOX 自交不亲和性 泛素 

分 类 号：Q943[生物学—植物学]