Bailly Christophe, Merendino Livia
Sorbonne Université, IBPS, CNRS, UMR 7622 Biologie du Développement, F-75005 Paris, France.
Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91405 Orsay, France.
Biochem J. 2021 May 28;478(10):1977-1984. doi: 10.1042/BCJ20200934.
Underground early development of higher plants includes two distinct developmental processes, seed germination and then skotomorphogenesis, a mechanism which favours elongation of the hypocotyl and helps the seedling to find light. Interestingly, both processes, which are regulated by plant hormones, have been shown to depend on reactive oxygen species metabolism and to be related to mitochondrial retrograde signalling. Here we review the recent outcomes in this field of research and highlight the emerging role of ROS communication between organelles and cell compartments. We point out the role of mitochondria as an environmental and developmental sensor organelle that regulates ROS homeostasis and downstream events and we propose future directions of research that should help better understanding the roles of ROS in germination and seedling emergence.
高等植物的地下早期发育包括两个不同的发育过程，即种子萌发和随后的黄化形态发生，这是一种有利于下胚轴伸长并帮助幼苗找到光照的机制。有趣的是，这两个受植物激素调节的过程都已被证明依赖于活性氧代谢，并与线粒体逆行信号传导有关。在这里，我们综述了该研究领域的最新成果，并强调了细胞器与细胞区室之间活性氧信号传导的新作用。我们指出线粒体作为一种环境和发育传感细胞器的作用，它调节活性氧稳态和下游事件，并提出未来的研究方向，这将有助于更好地理解活性氧在种子萌发和幼苗出土中的作用。
