Scholarlink

<p>Sulphur (S), a key element for plant growth and global biogeochemical cycles, profoundly regulates soil element turnover through microbially mediated processes, particularly the S redox reactions referred to as the “sulphur wheel”. However, the role of S wheel is often overlooked, and research on S wheel-driven multi-element coupled processes in soil remains limited. To address this gap, we synthesise current knowledge of microbially-driven S transformation processes and their biochemical coupling relationships with carbon (C), nitrogen (N), phosphorus (P) and iron (Fe) in soil. Notably, S redox reactions exhibit strong interactions with C cycling—sulphate-reducing bacteria (SRB), which anaerobically mineralise organic C for energy and produce carbon dioxide and methane. SRB can also oxidise methane to carbon dioxide in anoxic environments by cooperating with anaerobic methanotrophic archaea. In N cycling, sulphides inhibit nitrification by suppressing the activity of nitrifying bacteria. S redox processes compete or synergise with denitrification, anaerobic ammonia oxidation (anammox), and dissimilatory nitrate reduction to ammonium. Furthermore, the Fe and P cycles are closely regulated by S redox dynamics—S²⁻ produced during sulphate reduction can promote the release of Fe-bound P, whereas the oxidation of S²⁻ leads to acidification and subsequent dissolution of Fe–P complexes. This review expands our understanding of coupling relationships between S redox reactions and multi-element cycling, highlights the crucial role of the S wheel in soil, and offers insights into further investigations on S wheel-driven multi-element cycling and their microbial metabolic pathways.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sulphur wheel: A neglected driver for the coupling of multi-element cycles in soil

  • 期刊论文

  • 发表日期：

    2025年12月15日

查看全文
  • Tianzhuo Cheng,
  • Yingfan Wang,
  • Davey L. Jones,
  • Roland Bol,
  • Wolfgang Wanek,
  • Yongchao Liang,
  • Qingxu Ma

摘要

Sulphur (S), a key element for plant growth and global biogeochemical cycles, profoundly regulates soil element turnover through microbially mediated processes, particularly the S redox reactions referred to as the “sulphur wheel”. However, the role of S wheel is often overlooked, and research on S wheel-driven multi-element coupled processes in soil remains limited. To address this gap, we synthesise current knowledge of microbially-driven S transformation processes and their biochemical coupling relationships with carbon (C), nitrogen (N), phosphorus (P) and iron (Fe) in soil. Notably, S redox reactions exhibit strong interactions with C cycling—sulphate-reducing bacteria (SRB), which anaerobically mineralise organic C for energy and produce carbon dioxide and methane. SRB can also oxidise methane to carbon dioxide in anoxic environments by cooperating with anaerobic methanotrophic archaea. In N cycling, sulphides inhibit nitrification by suppressing the activity of nitrifying bacteria. S redox processes compete or synergise with denitrification, anaerobic ammonia oxidation (anammox), and dissimilatory nitrate reduction to ammonium. Furthermore, the Fe and P cycles are closely regulated by S redox dynamics—S²⁻ produced during sulphate reduction can promote the release of Fe-bound P, whereas the oxidation of S²⁻ leads to acidification and subsequent dissolution of Fe–P complexes. This review expands our understanding of coupling relationships between S redox reactions and multi-element cycling, highlights the crucial role of the S wheel in soil, and offers insights into further investigations on S wheel-driven multi-element cycling and their microbial metabolic pathways.