植物生态学报 ›› 2026, Vol. 50 ›› Issue (3): 674-684.DOI: 10.17521/cjpe.2025.0083  cstr: 32100.14.cjpe.2025.0083

• 研究论文 • 上一篇    下一篇

半干旱草地植物和丛枝菌根真菌群落对长期降水增加的响应

何堂庆1, 王变变2, 曹鑫鑫1, 张康成1, 汪晓东1, 王浩1, 白彤硕1, 赵叶新1, 张艺1, 王益3, 仇云鹏4,*(), 胡水金4   

  1. 1 南京农业大学资源与环境科学学院, 南京 210095
    2 宁夏云雾山国家级自然保护区管理局, 宁夏固原 756099
    3 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 西安 710061
    4 南京农业大学草业学院, 南京 210095
  • 收稿日期:2025-03-05 接受日期:2025-05-27 出版日期:2026-03-20 发布日期:2026-04-03
  • 通讯作者: *仇云鹏(yunpeng_qiu@njau.edu.cn)
  • 基金资助:
    国家自然科学基金(32371626);江苏省自然科学基金(BK20240193)

Responses of plants and arbuscular mycorrhizal fungal communities to long-term precipitation increase in a semi-arid grassland

HE Tang-Qing1, WANG Bian-Bian2, CAO Xin-Xin1, ZHANG Kang-Cheng1, WANG Xiao-Dong1, WANG Hao1, BAI Tong-Shuo1, ZHAO Ye-Xin1, ZHANG Yi1, WANG Yi3, QIU Yun-Peng4,*(), HU Shui-Jin4   

  1. 1 College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
    2 Ningxia Yunwu Mountains National Natural Reserve Administration, Guyuan, Ningxia 756099, China
    3 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
    4 College of Agro-grassland Science, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2025-03-05 Accepted:2025-05-27 Online:2026-03-20 Published:2026-04-03
  • Contact: *QIU Yun-Peng(yunpeng_qiu@njau.edu.cn)
  • Supported by:
    National Natural Science Foundation of China(32371626);Natural Science Foundation of Jiangsu Province(BK20240193)

摘要:

植物-丛枝菌根真菌(AMF)共生体系构成了陆地生态系统关键的养分传递网络, 在维持生态系统功能方面发挥着重要作用。然而, 目前对于AMF群落组成及其生态功能如何响应全球气候变化仍知之甚少。该研究依托黄土高原半干旱草地的全球变化长期控制实验平台, 利用野外原位样方调查和高通量测序技术, 探讨了降水增加背景下植物水分和养分获取策略及AMF群落组成的响应特征及其潜在关联。研究结果表明, 降水增加提高了半灌木和杂类草的生物量, 降低了禾草的生物量。相较于禾草, 半灌木和杂类草通常具有更加粗短的根系, 这可能增强了AMF的定殖潜力。高通量测序结果显示, 降水增加显著改变了AMF群落组成: 提高了巨孢囊霉科和类球囊霉科的相对丰度, 降低了球囊霉科相对丰度, 并显著提升了AMF群落网络的复杂性, 可能增强了植物对水分和养分的获取能力。综上, 该研究揭示了降水增加背景下植物功能群生长、根系性状、AMF群落组成及植物水分和养分获取策略之间的潜在联系。这些结果表明降水增加可能通过调控植物-AMF互作网络, 对草地生态系统的养分循环产生深远影响。

关键词: 降水增加, 丛枝菌根真菌, 资源获取, 半干旱草地

Abstract:

Aims The symbiosis between plants and arbuscular mycorrhizal fungi (AMF) constitutes a critical nutrient transfer network in terrestrial ecosystems, playing an essential role in sustaining ecosystem functions. However, AMF community composition and its ecological mechanism underlying their functional responses to global change remains poorly understood.

Methods By integrating a multi-year precipitation increase field experiment in a semi-arid grassland on the Loess Plateau with MiSeq sequencing, we measured plant biomass, root traits, and AMF community composition, and explored the effect of precipitation increase on plant resource acquisition strategies.

Important findings Our results showed that precipitation increase altered plant community composition, favoring subshrubs and forbs over grasses. Compared to grass, subshrub and forb often have thicker and shorter roots, which may enhance the colonization potential of AMF. MiSeq sequencing revealed that precipitation increase significantly altered the AMF community composition, increasing the relative abundance of Gigasporaceae and Paraglomeraceae, while reducing the relative abundance of Glomeraceae. Furthermore, precipitation increase enhanced the complexity of AMF community network. In conclusion, our findings demonstrate that precipitation increase regulates plant water and nutrient acquisition pathway via altering plant functional group growth, root traits, and AMF community composition. These results indicate that precipitation increase may have profound effects on nutrient cycling in grassland ecosystems via regulating the plant and AMF interaction network.

Key words: precipitation increase, arbuscular mycorrhizal fungi, resource acquisition, semi-arid grassland