中文摘要：

镜像花柱是指花柱在花水平面上向左（左花柱型）或向右（右花柱型）偏离花中轴线,是一种花柱多态现象,可根据左、右花柱花在植株上的排列式样划分为单型镜像花柱和二型镜像花柱两类,或根据镜像花柱和雄蕊的排列方式划分为雌雄互补镜像花柱和非雌雄互补镜像花柱两类。镜像花柱现象已在被子植物11个科的部分种类中进行了报道,它在保护功能型雄蕊和雌蕊、通过自交产生繁殖保障效应以及通过减小雌雄功能间干扰、提高异交率和雄性适合度等方面具有重要的进化意义,目前已成为植物繁殖生物学领域的研究热点。本文总结分析了国际上有关镜像花柱的研究工作,重点介绍：（1）镜像花柱的类型、镜像花的形态分化及花部特征,（2）镜像花柱植物在被子植物中的分布及其遗传演化,（3）镜像花的交配式样和交配频率、传粉特点及其进化生物学意义,并对今后的研究方向进行了展望,以期为进一步研究镜像花柱植物的进化生物学特性,推动我国在该领域的发展提供科学依据。

英文摘要：

Enantiostyly, deflection of style to left or to right side of floral axis, is a kind of style polymorphism. Based on organization of left- and right-styled flowers present on individual plants, enantiostyly can be expressed as two quite distinct forms： monomorphic and dimorphic enantiostyly. In monomorphic enantiostyly, individual plants produce both floral forms, either mixed within an inflorescence or segregated between left- and right-styled inflorescences, and this condition is not a genetic polymorphism. In dimorphic enantiostyly, plants are exclusively left- and right-styled, and this condition is a genetic polymorphism. Based on patterns of arrangement of style and stamens in individual flowers, enantiostyly can be expressed as reciprocal and nonreciprocal enantiostyly. Reciprocal enantiostyly is commonly associated with the reciprocal deflection of a pollinating anther, but in nonreciprocal enantiostyly there are no pollinating anther deflections. Enantiostyly has been reported in 11 families of angiosperm. It is generally considered to play an important role in （1） protecting the functional pistil and stamens, （2） insuring reproduction by selfing, and （3） increasing male fitness and outcrossing rates by reducing sexual interference between female and male function. Enantiostyly has been hotly-debated in plant reproductive biology. The purpose of this paper is to review and analyze recent advances in enantiostyly research, with emphases on 1） types of enantiostyly and morphological differentiation and floral characteristics of mirror-image flowers; 2） taxonomy, genetics and evolution of angiosperms that exhibit enantiostyly; and 3） the evolutionary biology of mating patterns and pollinating characteristics associated with enantiostyly. Finally, prospects for further research in this area are discussed. Our review provides a database for further study of the evolutionary biology of enantiostylous species and points out the significance of enantiostyly in the evolution of breeding system