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multicellular rotating algae with root and leaf differentiation, is considered by the academic community to be the ancestors of land plants. Recently, scientists obtained the first genome of Mesostigma viride, the oldest single-celled algae in the green plant world, making a major breakthrough in the study of the oscic and transcriptional groups. The results were published online in Advanced Science.
the evolution of single-celled to multi-celled organisms is an important milestone in the evolutionary history of life. So far, the reported genome of land-based plants and cyanobacteria are multi-celled plants, and due to the lack of information such as single-celled cyanobacteria genome, observational groups, researchers have been unable to understand the evolution from single-cell to multi-cell and the ultimate origin mechanism of land-based plants, greatly limiting the study of land plant evolution, as well as through comparative species evolution of the core genes and surface regulatory factors.
the China Science Daily, the results were completed by Gu Xiaofeng, a researcher at the Institute of Biotechnology of the Chinese Academy of Agricultural Sciences, and Zhang Wei, a researcher, in cooperation with scientists at home and abroad.
zhang Wei introduced, M. Viride is the oldest known single-celled algae, with information on its genome, transcription and observational groups, and is a key node in revealing the origin and evolution of the entire plant, which is important for explaining the evolutionary history of life on Earth and the early differentiation of plants about 1 billion years ago. The researchers assembled a high-quality genome, 442 Mb in size, rich in repetitive sequences, and discovered possible genome replication events.
comparative genomic analysis, it is further revealed that single-celled rotating algae already possess a large amount of genetic information related to the characteristics of land-based plants, and expounds various mechanisms such as the evolution of photosynthelative pathways and the response to adversity.
Gu Xiaofeng told the China Science Daily that the study revealed the mechanism of plant single-celled to multicellular evolution and the origin of land-based plants, complementing important nodes that have been missing in the course of life evolution research, and is of great theoretical and practical significance for understanding the origin of the whole life system. At the same time, the mechanisms of the expression of the gene of the observational genetic regulation, the evolution of photolycerial pathways and the response to adversity stress will provide new ideas for the basic research and breeding application of higher plants such as food crops resisting, improving the efficiency of photolycering and even variety improvement.
research has been supported by projects such as scientific and technological innovation projects of the Chinese Academy of Agricultural Sciences.
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