浮游植物
谱系(遗传)
优势(遗传学)
生态学
生物
生态系统
活性氧
系统发育学
赤潮
中生代
分子钟
海洋生态系统
质体
进化生物学
进化生态学
气候变化
环境变化
营养物
多元化(营销策略)
收敛演化
光合作用
进化动力学
作者
Yuxi Zhao,Man Tong,Li Tian,Genming Luo,Ping Li,Haijun Song,Zhong‐Qiang Chen,Shucheng Xie,A. Kappler,Songhu Yuan
标识
DOI:10.1073/pnas.2521306123
摘要
The great phytoplanktonic shift from green to red plastid lineage dominance in the early Mesozoic marks a primary producer revolution in marine ecosystems, facilitating the rise of modern ecosystems and impacting global carbon cycling and energy flows. The causes driving this evolutionary transition have been attributed to the changes in essential nutrients and the environmental crises of the Permian-Triassic mass extinction. Nonetheless, the underlying mechanisms driving this transition remain poorly understood. Here, we integrated culture experiments, molecular and physiological analyses, big data analysis, and phylogenomic dating analyses to uncover how environmental stresses influence algal physiology, thereby altering their evolutionary trajectories. We find that environmental and endogenous reactive oxygen species (ROS) collaboratively shape phytoplanktonic responses. The structural characteristics of red lineage phytoplankton enhance resistance to environmental ROS, facilitating physiological strategies that minimize endogenous ROS accumulation, thereby driving more adaptive evolutionary trajectories under environmental stresses in the early Mesozoic. The alignment of the turnover in diversification dynamics between the two lineages with paleoenvironmental shifts that triggered increased ROS production supports the role of ROS in driving this evolutionary transition. Our findings highlight ROS as a key underlying factor driving phytoplankton evolution, providing predictive insights into major biota-environment coevolutions throughout Earth's history.
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