Department of Cell and Systems Biology, University of Toronto, Toronto, Canada.
J Exp Bot. 2010 Apr;61(7):1987-99. doi: 10.1093/jxb/erq021. Epub 2010 Feb 24.
In the Brassicaceae, the acceptance of compatible pollen and the rejection of self-incompatible pollen by the pistil involves complex molecular communication systems between the pollen grain and the female reproductive structures. Preference towards species related-pollen combined with self-recognition systems, function to select the most desirable pollen; and thus, increase the plant's chances for the maximum number of successful fertilizations and vigorous offspring. The Brassicaceae is an ideal group for studying pollen-pistil interactions as this family includes a diverse group of agriculturally relevant crops as well as several excellent model organisms for studying both compatible and self-incompatible pollinations. This review will describe the cellular systems in the pistil that guide the post-pollination events, from pollen capture on the stigmatic papillae to pollen tube guidance to the ovule, with the final release of the sperm cells to effect fertilization. The interplay of other recognition systems, such as the self-incompatibility response and interspecific interactions, on regulating post-pollination events and selecting for compatible pollen-pistil interactions will also be explored.
在十字花科植物中，雌蕊接受亲和花粉和拒绝自交不亲和花粉涉及花粉粒和雌性生殖结构之间复杂的分子通讯系统。对种间相关花粉的偏好与自识别系统相结合，起到选择最理想花粉的作用，从而增加植物成功受精和产生健壮后代的机会。十字花科是研究花粉-柱头相互作用的理想群体，因为该科包括了一系列多样化的农业相关作物，以及几个用于研究亲和和自交不亲和授粉的优秀模式生物。本综述将描述引导授粉后事件的柱头细胞系统，从花粉在柱头乳突上的捕获到花粉管导向胚珠，最后释放精子细胞以实现受精。还将探讨其他识别系统（如自交不亲和反应和种间相互作用）在调节授粉后事件和选择亲和花粉-柱头相互作用中的相互作用。
