文献类型： 外文期刊
作者： Bao, Yuanyuan 1 ; Saez-Sandino, Tadeo 2 ; Feng, Youzhi 1 ; Yan, Xuebin 6 ; He, Shiying 7 ; Feng, Shilun 8 ; Chen, Ruirui 1 ; Guo, Hui 6 ; Delgado-Baquerizo, Manuel 9 ;
作者机构： 1.Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Peoples R China
2.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia
3.Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013, Spain
4.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
5.Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing 210095, Peoples R China
6.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
7.Jiangsu Acad Agr Sci, Key Lab Agroenvironm Downstream Yangtze Plain, Minist Agr & Rural Affairs, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China
8.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
9.CSIC, Inst Recursos Nat & Agrobiol Sevilla IRNAS, Lab Biodivers & Funcionamiento Ecosistem, Av Reina Mercedes 10, E-41012 Seville, Spain
关键词： Aridity; Climate change; Microbial eco-physiology; Soil microorganisms; Soil organic carbon; Warming
期刊名称：GEODERMA （ 影响因子：6.6； 五年影响因子：7.3 ）
ISSN： 0016-7061
年卷期： 2025 年 460 卷
页码：
收录情况： SCI
摘要： Aridity and warming accelerate soil organic carbon (SOC) loss, thereby compromising essential functions of soil health, such as nutrient retention and microbial diversity. However, the mechanisms by which microbes adapt to arid and low SOC conditions remain poorly understood. Here, using data from an 8-y field-scale manipulation experiment, we found that the largely undescribed Gemmatimonadetes could be among the well-adapted bacterial taxa for thriving under low SOC content and arid ecosystems. Their enhanced ability to tolerate drought stress-mediated by metabolic pathways for the synthesis of osmolytes (e.g., glycine, betaine, choline, ectoine, and histidine)-and their capacity to acquire carbon resource through glycoside hydrolase genes involved in organic matter decomposition (41.6 % and 11.8 % higher than those in the total bacterial community, respectively), could explain this pattern. Further analyses based on a global-scale standardized field survey covering all continents and major ecosystem types further confirmed that Gemmatimonadetes-and, at a finer resolution, Gemmatirosa-predominated in arid (with a peak relative abundance of Gemmatimonadetes reaching 3.8 % in dry grasslands) and warm regions (peaking at 4.5 % in Africa) of the planet, where the SOC content is low. Our work provides new insights into how a largely neglected microbial group, such as Gemmatimonadetes/Gemmatirosa, can adapt to increasing environmental stress in arid and low-carbon environments in a changing world.
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