Molecular adaptations to light during the water-to-land transition using the moss Physcomitrium patens and the charophyte alga Mesotaenium endlicherianum

在从水生生物过渡到陆生生物时，绿色生物受到了环境光条件的巨大变化的挑战，包括光强度的增加，光强度波动的增加，光谱的变化，最终还有树冠阴影。此外，新进化的植物复杂性和固着生活方式需要光感知与内源发育程序相互关联，以允许光适应生长和发育。因此，我们将研究光信号和光响应的苔藓立碗藓和轮藻中Mesotaenium endlicherianum，从而专注于光保护对高光胁迫，光形态建成和叶绿体发育。我们将研究两个转录因子与COP 1/SPA E3泛素连接酶在P. patens和M. endlicherianum的研究，以确定可能早于植物陆生化的叶绿体发育、光形态建成、光保护和光调节基因表达网络的调节方面的创新。

Upon the transition from aquatic to terrestrial life, green organisms were challenged by vastly altered ambient light conditions, including an increase in the intensity of light, an increase in the fluctuation of light intensity, a change in the light spectrum and eventually also canopy shade. Moreover, the newly evolved plant complexity and sessile life style necessitated that light perception be interconnected with endogenous developmental programs to allow light-adapted growth and development. We will therefore study light signaling and light responses in the moss Physcomitrium patens and in the charophyte alga Mesotaenium endlicherianum, thereby focusing on photoprotection towards high light stress, photomorphogenesis and chloroplast development. We will study two transcription factors that interact with the COP1/SPA E3 ubiquitin ligase in P. patens and M. endlicherianum in order to identify innovations in the regulation of chloroplast development, photomorphogenesis, photoprotection and light-regulated gene expression networks that may have predated plant terrestrialization.