April 19th

According to Northwest University

The early life and environmental research team in Northwest University cooperated with scientists such as the Institute of Geology and Earth Physics of the Chinese Academy of Sciences, and Shanghai Jiaotong University and other scientists.In the Cambrian Qingjiang biological group 518 million years ago, it was found that the multi -cell -structured filamentate sulfate restores bacterial fossils of the Qingjiang bacteria and combined with the results of molecular biology analysis.Prior to this, except for a few blue bacterial fossils with special appearance and small magnetic bacterial magnetic fossils, no reliable sulfate reduced bacterial fossils were found in ancient geological records.The relationship between the evolution of sulfate and the changes in the earth’s environment has no clear understanding of the scientific community.

Related research results were published recently on the academic journal “Scientific Report” (English version), and the 06th edition of the Science and Technology Daily also reported on this achievement on April 18.

Zhang Xingliang, the author of the thesis and professor of Northwest University, said that sulfate restore bacteria is a type of microorganisms living under anaerobic conditions. They use sulfate oxidation organic carbon to obtain energy and restore sulfate in this process to produce metabolites.Hydrogen sulfide.These bacteria are of great significance in environmental science, ecology and industrial fields.They are the key promoters of the sulfur cycle of the earth. By reducing sulfate to participate in the biochemical cycle of sulfur, it affects the conversion of sulfur in different valence states and forms.At the same time, they also participate in the processing of organic matter and methane oxidation, thereby regulating the oxidation and restore state and greenhouse gas emissions of the ocean.

Based on the results of the analysis of fossil evidence and spectrum genome, the research team proposed that sulfate reduction bacteria and the earth’s oxidation incident collaborative evolutionary hypothesis believed that the radiation evolution of desulfurization bacteria doors first had radiation during the large oxidation incident of 2.4 billion years ago.Silk -shaped multi -cell types; in the late NTD, the second oxidation incident on the earth caused a wide oxidation of the underwater underwater, and the silk type was conducted by about 560 million years ago.In the interface, one end is restoring sulfur dioxide, and the other end is restored to oxygen cable bacteria at the other end.

Li Jinhua, the author of the paper and researcher at the Institute of Geology and Geophysics of the Chinese Academy of Sciences, said that this research is the result of cross -cooperation between paleontology, global chemistry, and spectrum genome.The first attempt for environmental collaborative evolution,It is of great significance to integrate the latest technologies such as micro -science and genomics, promote the cross -edge of geological and biology, and explore the synergy evolution of the earth and life.

“Combined with molecular biology to predict the evolution of different spectrometers, finding reliable microbial fossil evidence in ancient geological records is an important research topic of current celestial biology.” Wang Yinhuan, the common communication author of the paper, and an associate professor of Shanghai Jiaotong University, believeThis research can provide a reference for scientists to discuss “the study of the existence and evolution of life in other planets such as Mars” and provide a possible way for human beings to find out -of -life life.