Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China.
Medical School, Kunming University of Science and Technology, Kunming, China.
J Basic Microbiol. 2023 Oct;63(10):1115-1127. doi: 10.1002/jobm.202300273. Epub 2023 Jul 13.
With the development of global industrialization, carbon neutrality has become an issue that we must be paid attention to. Microorganisms not only have an important impact on the carbon chemical cycle between the Earth's biosphere and biogeography but also play a key role in maintaining the global organic carbon balance. Wetlands are the main reservoir of organic carbon in the mainland of China, and wetland carbon sinks are indispensable for China to achieve the goal of "dual carbon," and China has taken the consolidation and improvement of wetland carbon sink capacity as an important part of the carbon peaking action plan. As a unique low-latitude, high-altitude seasonal plateau wetland in China, Napahai shows high research value. However, the role of microbes in maintaining dissolved organic carbon balance in this area has not been reported. In the study, six carbon fixation genes, accA, aclB, acsA, acsB, cbbL, and rbcL, were analyzed based on metagenomics to elucidate the rich genetic diversity, uniqueness and differences in the Napahai plateau wetland. It was found that the microbial diversity in the Napahai plateau wetland was different from other habitats. In addition, the aclB gene, a rare taxon with high genetic diversity and rich species in the Napahai plateau wetland, played a key role in the microbial metabolic pathway. Finally, the construction of a metabolic pathway through the Kyoto encyclopedia for genes and genomes revealed the contribution of microbes to carbon fixation and the role of microbes in maintaining the organic carbon balance of the Napahai plateau wetland.
随着全球工业化的发展，碳中和已经成为我们必须关注的问题。微生物不仅对地球生物圈和生物地理学之间的碳化学循环有着重要的影响，而且在维持全球有机碳平衡方面也起着关键作用。湿地是中国大陆有机碳的主要储存库，湿地碳汇是中国实现“双碳”目标不可或缺的，中国已将巩固和提高湿地碳汇能力作为碳峰值行动计划的重要组成部分。作为中国独特的低纬、高海拔季节性高原湿地，纳帕海具有很高的研究价值。然而，微生物在维持该地区溶解有机碳平衡中的作用尚未有报道。在这项研究中，基于宏基因组学分析了六个碳固定基因 accA、aclB、acsA、acsB、cbbL 和 rbcL，以阐明纳帕海高原湿地丰富的遗传多样性、独特性和差异。结果发现，纳帕海高原湿地的微生物多样性与其他生境不同。此外，aclB 基因是纳帕海高原湿地中一个具有高遗传多样性和丰富物种的稀有分类群，在微生物代谢途径中起着关键作用。最后，通过基因和基因组京都百科全书构建代谢途径，揭示了微生物对碳固定的贡献以及微生物在维持纳帕海高原湿地有机碳平衡中的作用。
