Department of Biochemistry, Palacký University in Olomouc, Šlechtitelů 11, 78371 Olomouc, Czech Republic.
Plant Sci. 2011 Nov;181(5):560-72. doi: 10.1016/j.plantsci.2011.03.014. Epub 2011 Apr 6.
Two complex physiological processes, with opposite positions in the plant's life-cycle, seed and pollen germination, are vital to the accomplishment of successful plant growth and reproduction. This review summarizes the current state of knowledge of the intersection of NO signalling with the signalling pathways of ABA, GA, and ethylene; plant hormones that control the release of plant seeds from dormancy and germination. The cross-talk of NO and ROS is involved in the light- and hormone-specific regulation of seeds' developmental processes during the initiation of plant ontogenesis. Similarly to seed germination, the mechanisms of plant pollen hydration, germination, tube growth, as well as pollen-stigma recognition are tightly linked to the proper adjustment of NO and ROS levels. The interaction of NO with ROS and secondary messengers such as Ca(2+), cAMP and cGMP discovered in pollen represent a common mechanism of NO signalling. The involvement of NO in both breakpoints of plant physiology, as well as in the germination of spores within fungi and oomycetes, points toward NO as a component of an evolutionary conserved signalling pathway.
两个复杂的生理过程，在植物生命周期中处于相反的位置，种子和花粉的萌发，对于成功的植物生长和繁殖至关重要。本综述总结了目前关于 NO 信号与 ABA、GA 和乙烯等植物激素信号通路交叉的知识状态，这些植物激素控制植物种子从休眠到萌发的释放。NO 和 ROS 的串扰参与了植物个体发生起始过程中种子发育过程的光和激素特异性调节。与种子萌发类似，植物花粉水合、萌发、管生长以及花粉-柱头识别的机制与 NO 和 ROS 水平的适当调节密切相关。在花粉中发现的 NO 与 ROS 和第二信使（如 Ca(2+)、cAMP 和 cGMP）的相互作用代表了 NO 信号的一种常见机制。NO 参与植物生理学的两个关键点，以及真菌和卵菌孢子的萌发，表明 NO 是进化保守信号通路的一个组成部分。
