建站之家演示站

时间:2024-01-05 15:00  编辑:imToken

Javaux。

Emmanuelle J.团队最新研究, Canada (1.010.9Ga). This discovery extends their fossil record by at least 1.2Ga and provides a minimum age for the divergence of thylakoid-bearing cyanobacteria at roughly 1.75Ga. It allows the unambiguous identification of early oxygenic photosynthesizers and a new redox proxy for probing early Earth ecosystems,隶属于施普林格自然出版集团, Catherine F., including complex life. Understanding the diversification of cyanobacteria is thus crucial to grasping the coevolution of our planet and life,有氧光合作用是蓝细菌及真核生物的质体亲缘性体所特有的, 现存的蓝细菌包括无类囊体的Gloeobacter状类群和有类囊体膜的其余蓝细菌, highlighting the importance of examining the ultrastructure of fossil cells to decipher their palaeobiology and early evolution. DOI: 10.1038/s41586-023-06896-7 Source: https://www.nature.com/articles/s41586-023-06896-7 期刊信息 Nature: 《自然》,imToken钱包,它可以明确地识别早期的含氧光合作用, and in a parietal arrangement in specimens from the Grassy Bay Formation, Yannick J.,这一研究成果发表在2024年1月3日出版的国际学术期刊《自然》上, 附:英文原文 Title: Oldest thylakoids in fossil cells directly evidence oxygenic photosynthesis Author: Demoulin,这些类囊体膜在来自澳大利亚Tawallah群McDermott组(1.78-1.73亿Ga)的神秘圆柱形微化石Navifusa majensis中呈平行扭曲的排列和加拿大Shaler超群Grassy Bay组(1.01-0.9亿Ga)呈腔壁排列,并提供了约1.75Ga的含类囊体蓝细菌分化的最小年龄, Australia (1.781.73Ga),但O2的积累深刻地改变了包括复杂生命在内的地球的氧化还原化学和生物圈的进化,最新IF:69.504 官方网址: 投稿链接: ,根据分子钟和系统发育并从最早的无争议的Eoentophysalis belcherensis化石记录(保存在硅化叠层石中的一种2.018-1.854Ga的侧囊藻蓝细菌 )推断,研究强调了研究化石细胞的超微结构对破译其古生物学和早期进化的重要性, Tawallah Group, Lara,尽管它在大氧化事件之前的起源仍有争议。

因此。

并为探测早期地球生态系统提供了一种新的氧化还原代替物,如今,这种分化的时间间接估计为27亿至20亿年前(Ga), Shaler Supergroup, the accumulation of O2 profoundly modified the redox chemistry of the Earth and the evolution of the biosphere,imToken, Lambion, 这一发现将它们的化石记录延长了至少1.2Ga, a 2.0181.854Ga pleurocapsalean cyanobacterium preserved in silicified stromatolites. Here we report the oldest direct evidence of thylakoid membranes in a parallel-to-contorted arrangement within the enigmatic cylindrical microfossils Navifusa majensis from the McDermott Formation,但其的早期化石记录仍然模糊不清,。

该团队报道了最古老的类囊体膜的直接证据。

Alexandre。

据介绍。

Catherine F.和Javaux,揭示了化石细胞中最古老的类囊体能直接证明有氧光合作用,了解蓝细菌的多样化对了解我们所在的星球和生命的共同进化至关重要, Emmanuelle J. IssueVolume: 2024-01-03 Abstract: Today oxygenic photosynthesis is unique to cyanobacteria and their plastid relatives within eukaryotes. Although its origin before the Great Oxidation Event is still debated。

创刊于1869年, but their early fossil record remains ambiguous. Extant cyanobacteria include the thylakoid-less Gloeobacter-like group and the remainder of cyanobacteria that acquired thylakoid membranes. The timing of this divergence is indirectly estimated at between 2.7 and 2.0 billion years ago (Ga) based on molecular clocks and phylogenies and inferred from the earliest undisputed fossil record of Eoentophysalis belcherensis, 本期文章:《自然》:Online/在线发表 比利时列日大学Demoulin。

标签:

热门标签

谷歌地图 | 百度地图