University of Göttingen, Institute for Microbiology and Genetics, Department of Applied Bioinformatics, Göttingen, Germany.
Population Genetics, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany.
J Exp Bot. 2020 Jun 11;71(11):3254-3269. doi: 10.1093/jxb/eraa007.
Embryophytes (land plants) can be found in almost any habitat on the Earth's surface. All of this ecologically diverse embryophytic flora arose from algae through a singular evolutionary event. Traits that were, by their nature, indispensable for the singular conquest of land by plants were those that are key for overcoming terrestrial stressors. Not surprisingly, the biology of land plant cells is shaped by a core signaling network that connects environmental cues, such as stressors, to the appropriate responses-which, thus, modulate growth and physiology. When did this network emerge? Was it already present when plant terrestrialization was in its infancy? A comparative approach between land plants and their algal relatives, the streptophyte algae, allows us to tackle such questions and resolve parts of the biology of the earliest land plants. Exploring the biology of the earliest land plants might shed light on exactly how they overcame the challenges of terrestrialization. Here, we outline the approaches and rationale underlying comparative analyses towards inferring the genetic toolkit for the stress response that aided the earliest land plants in their conquest of land.
植物（陆地植物）几乎可以在地球表面的任何栖息地找到。所有这些生态多样的植物胚胎植物都是通过单一的进化事件从藻类中产生的。对于植物单一征服陆地来说，其性质不可缺少的特征是克服陆地胁迫的关键特征。毫不奇怪，陆地植物细胞的生物学受到核心信号网络的塑造，该网络将环境线索（如胁迫）与适当的响应联系起来，从而调节生长和生理。这个网络是什么时候出现的？当植物的陆地化还处于起步阶段时，它是否已经存在了？在陆地植物与其藻类近亲——石松类藻类之间进行比较研究，使我们能够解决这些问题，并解决部分早期陆地植物的生物学问题。探索早期陆地植物的生物学可能有助于阐明它们是如何克服陆地化挑战的。在这里，我们概述了进行比较分析的方法和基本原理，以推断出有助于早期陆地植物征服陆地的应激反应的遗传工具包。
