The dominant genera of nitrogenase (nifH) affects soil biological nitrogen fixation along an elevational gradient in the Hengduan mountains

被引：2
作者：
Chen Q. [1 ]
Long C. [1 ]
Bao Y. [1 ]
Men X. [1 ]
Zhang Y. [1 ]
Cheng X. [1 ]
机构：
[1] Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province, School of Ecology and Environmental Sciences, Yunnan University, Kunming
来源：
Chemosphere | 2024年 / 347卷
基金：
中国国家自然科学基金;
关键词：
Abundance; Altitude; Biological N fixation; Diversity; Isotope; Nitrogenase reductase;
D O I：
10.1016/j.chemosphere.2023.140722
中图分类号：
学科分类号：
摘要：
Biological nitrogen (N) fixation by diazotrophic microbes is an essential process for the N input. However, the patterns of biological N fixation and its biological or environmental mechanism along an elevational gradient in mountain ecosystems are not fully understood. In this study, a field experiment was conducted in the Hengduan Mountains to investigate the biological N fixation associated with the diversity and abundance of the nifH gene. Our results showed that both the abundance of the nifH gene and the biological N fixation displayed hump-shaped trends along an elevation gradient in the wet and dry seasons. However, the diversity of the nifH gene showed an inverse unimodal trend along an elevation gradient. We observed that biological N fixation was jointly associated with the abundance of the nifH gene, especially dominant genera, as well as soil chartacteristics. Among them, clay content played a preeminent role in the regulation of N fixation potentially through the formation of microaggregates and microenvironments. In general, our results revealed that biological N fixation was correlated with the abundance of microorganisms, especially dominant genera, and soil texture. These results highlighted the importance of dominant genera, which should be considered in the modeling and forecasting of N cycling under future environmental change. © 2023 Elsevier Ltd
引用
收藏
相关论文
共 60 条
  • [1] Batterman S.A., Hedin L.O., van Breugel M., Ransijn J., Craven D.J., Hall J.S., Key role of symbiotic dinitrogen fixation in tropical forest secondary succession, Nature, 502, pp. 224-227, (2013)
  • [2] Bentley B.L., Nitrogen fixation by epiphylls in a tropical rainforest, Ann. Mo. Bot. Gard., 74, pp. 234-241, (1987)
  • [3] Cao Y., Wang E., Zhao L., Chen W., Wei G., Diversity and distribution of rhizobia nodulated with Phaseolus vulgaris in two ecoregions of China, Soil Biol. Biochem., 78, pp. 128-137, (2014)
  • [4] Chen Q., Chen J., Andersen M.N., Cheng X., Elevational shifts in foliar-soil delta <sup>15</sup>N in the Hengduan Mountains and different potential mechanisms, Global Change Biol., 28, pp. 5480-5491, (2022)
  • [5] Chotte J.L., Schwartzmann A., Bally R., Monrozier L.J., Changes in bacterial communities and Azospirillum diversity in soil fractions of a tropical soil under 3 or 19 years of natural fallow, Soil Biol. Biochem., 34, pp. 1083-1092, (2002)
  • [6] Ciampitti I.A., de Borja Reis A.F., Cordova S.C., Castellano M.J., Archontoulis S.V., Correndo A.A., Antunes De Almeida L.F., Moro Rosso L.H., Revisiting biological nitrogen fixation dynamics in soybeans, Front. Plant Sci., 12, pp. 727021-727031, (2021)
  • [7] Collavino M.M., Tripp H.J., Frank I.E., Vidoz M.L., Calderoli P.A., Donato M., Zehr J.P., Aguilar O.M., nifH pyrosequencing reveals the potential for location-specific soil chemistry to influence N<sub>2</sub>-fixing community dynamics, Environ. Microbiol., 16, pp. 3211-3223, (2014)
  • [8] Cusack D.F., Silver W., McDowell W.H., Biological nitrogen fixation in two tropical forests: ecosystem-level patterns and effects of nitrogen fertilization, Ecosystems, 12, pp. 1299-1315, (2009)
  • [9] DeLuca T.H., Zackrisson O., Nilsson M.C., Sellstedt A., Quantifying nitrogen-fixation in feather moss carpets of boreal forests, Nature, 419, pp. 917-920, (2002)
  • [10] Dunne J.A., Saleska S.R., Fischer M.L., Harte J., Integrating experimental and gradient methods in ecological climate change research, Ecology, 85, pp. 904-916, (2004)
123456