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Snow ball earth and the split of Streptophyta and Chlorophyta.

机译:雪球地球和链霉菌和绿藻的分裂。

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摘要

About 700 million years ago (Mya), the ancestor of all green plants evolved into two major groups: the Chlorophyta (many green algae) and the Streptophyta (some green algae and land plants=embryophytes). Both groups are separated by several morphological, physiological, and molecular characteristics, including different photorespiration pathways. The Chloropyhta/Streptophyta split was probably very important for the colonization of the terrestrial habitat because embryophytes, the descendants of streptophyte algae, today completely dominate the macrophyte flora of the terrestrial habitats. By contrast, in aquatic ecosystems macrophytes from brown, red, and green algae compete with embryophytes. In this opinion article, I argue that the Chlorophyta/Streptophyta split is related to glaciation events (snow ball earth states) in the Neoproterozoic and provide an explanation for the different photorespiration pathways.
机译:大约7亿年前(Mya),所有绿色植物的祖先都演化为两个主要类别:绿藻(许多绿藻)和链霉菌(某些绿藻和陆地植物=胚藻)。两组都被几种形态,生理和分子特征分开,包括不同的光呼吸途径。 Chropropyhta / Streptophyta的分裂对于陆地生境的定殖可能非常重要,因为如今,胚藻(链霉菌藻类的后代)完全占据了陆地生境的大型植物区系。相比之下,在水生生态系统中,褐藻,红藻和绿藻的大型植物与胚类竞争。在这篇观点文章中,我认为绿藻/链藻的分裂与新元古代的冰川活动(雪球地球状态)有关,并为不同的光呼吸途径提供了解释。

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