Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma 630-0192, Japan.
Nat Plants. 2016 Sep 6;2(9):16130. doi: 10.1038/nplants.2016.130.
The mechanisms by which flowering plants choose their mating partners have interested researchers for a long time. Recent findings on the molecular mechanisms of non-self-recognition in some plant species have provided new insights into self-incompatibility (SI), the trait used by a wide range of plant species to avoid self-fertilization and promote outcrossing. In this Review, we compare the known SI systems, which can be largely classified into non-self- or self-recognition systems with respect to their molecular mechanisms, their evolutionary histories and their modes of evolution. We review previous controversies on haplotype evolution in the gametophytic SI system of Solanaceae species in light of a recently elucidated non-self-recognition model. In non-self-recognition SI systems, the transition from self-compatibility (SC) to SI may be more common than previously thought. Reversible transition between SI and SC in plants may have contributed to their adaptation to diverse and fluctuating environments.
长期以来，有性植物选择交配对象的机制一直令研究人员感兴趣。最近在一些植物物种中非自我识别的分子机制方面的发现，为自交不亲和性（SI）提供了新的见解，自交不亲和性是广泛的植物物种用来避免自花授粉和促进异花授粉的特性。在这篇综述中，我们比较了已知的 SI 系统，这些系统可以根据其分子机制、进化历史和进化模式大致分为非自我识别或自我识别系统。我们根据最近阐明的非自我识别模型，回顾了茄科植物配子体 SI 系统中单体型进化的先前争议。在非自我识别的 SI 系统中，从自交亲和性（SC）到 SI 的转变可能比以前认为的更为常见。植物中 SI 和 SC 之间的可逆转变可能有助于它们适应多样化和波动的环境。
