植物生态学报 ›› 2026, Vol. 50 ›› Issue (3): 710-721.DOI: 10.17521/cjpe.2025.0173  cstr: 32100.14.cjpe.2025.0173

• 研究论文 • 上一篇    下一篇

丛枝菌根真菌与凋落物互作有助于加拿大一枝黄花应对营养胁迫

任曦彤1,2, 李颖1, 张雨3, 熊胡安赫1, 张蕊科1, 祁珊珊3, 戴志聪1,2,4,*()(), 杜道林5   

  1. 1 江苏大学环境与安全工程学院(镇江市重点实验室), 江苏镇江 212013
    2 江苏大学农业工程学部, 江苏镇江 212013
    3 江苏大学农业工程学院, 江苏镇江 212013
    4 苏州科技大学, 江苏水处理技术与材料协同创新中心, 江苏苏州 215009
    5 江苏大学京江学院, 江苏镇江 212028
  • 收稿日期:2025-05-15 接受日期:2025-07-21 出版日期:2026-03-20 发布日期:2026-04-22
  • 通讯作者: *戴志聪(daizhicong@163.com)
  • 基金资助:
    国家自然科学基金(32271587);国家自然科学基金(32171509);国家级大学生创新训练计划项目(202510299026)

Interaction between arbuscular mycorrhizal fungi and litter contributes to responses of Solidago canadensis to nutrient stress

REN Xi-Tong1,2, LI Ying1, ZHANG Yu3, XIONG Hu-An-He1, ZHANG Rui-Ke1, QI Shan-Shan3, DAI Zhi-Cong1,2,4,*()(), DU Dao-Lin5   

  1. 1 School of the Environment and Safety Engineering, Key Laboratory of Zhenjiang, Jiangsu University, Zhenjiang, Jiangsu 212013, China
    2 Faculty of Agricultural Engineering of Jiangsu University, Zhenjiang, Jiangsu 212013, China
    3 School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
    4 Suzhou University of Science and Technology, Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment, Suzhou, Jiangsu 215009, China
    5 Jingjiang College, Jiangsu University, Zhenjiang, Jiangsu 212028, China
  • Received:2025-05-15 Accepted:2025-07-21 Online:2026-03-20 Published:2026-04-22
  • Contact: *DAI Zhi-Cong(daizhicong@163.com)
  • Supported by:
    National Natural Science Foundation of China(32271587);National Natural Science Foundation of China(32171509);National College Student Innovation Training Program(202510299026)

摘要:

植物入侵往往引起本地物种多样性的丧失, 造成巨大的经济损失。用于解释外来植物成功入侵的“共生促进假说”提出: 入侵植物往往可以与具有促进作用的共生微生物形成良好的共生关系。为探究不同营养条件下丛枝菌根真菌(AMF)与凋落物互作对入侵植物生长策略的贡献, 该研究以恶性入侵植物加拿大一枝黄花(Solidago canadensis)为研究对象, 通过接种AMF菌剂幼套球囊霉(Claroideoglomus etunicatum)并添加其叶片凋落物, 探讨AMF和凋落物的互作在加拿大一枝黄花响应不同营养条件中的作用。结果显示: 添加凋落物显著提高加拿大一枝黄花的菌根侵染率及侵染丰度; 在低营养情况下, AMF及凋落物都能显著促进植株的茎长、叶面积及地上生物量, 但植株的根冠比显著降低, 且AMF与凋落物互作的效果最为显著; 在正常营养情况下, 仅AMF与凋落物互作对植物的部分指标有显著影响——抑制了根的发育但提高了地上生物量。相对作用强度(RII)分析表明, AMF和凋落物的添加都对加拿大一枝黄花地上部分的生长有显著促进作用, 且在低营养条件下的促进作用显著强于正常营养条件。研究结果表明, 加拿大一枝黄花可以通过AMF与凋落物的互作调整地上地下资源分配策略以应对低营养胁迫。研究结果有助于从共生微生物AMF与凋落物互作的视角解释外来入侵植物如何通过地上地下部分的资源分配策略响应不同营养胁迫, 加深对入侵植物成功入侵机制的理解。

关键词: 植物入侵, 营养胁迫, 植物-微生物互作, 资源分配, 生长策略

Abstract:

Aims Plant invasions often lead to the loss of local species diversity and cause significant economic losses. The Enhanced Mutualisms Hypothesis, a widely recognized invasion mechanism, suggests that alien plant species capitalize on novel but strong soil mutualists, enhancing their success in invasion. In this study, the contributions of arbuscular mycorrhizal fungi (AMF) and litter to the growth strategy of invasive plant under different nutrient conditions were investigated.

Methods We inoculated AMF (Claroideoglomus etunicatum) and leaf litter to explore the roles of AMF-litter interactions in the responses of notorious invasive Solidago canadensis under varying nutrient conditions.

Important findings The results showed that litter addition significantly increased the mycorrhizal colonization rate and ratio of abundance class in S. canadensis. Under low-nutrient conditions, both AMF and litter promoted the stem length, leaf area and above-ground biomass, but significantly decreased the root-shoot ratio, and with the most pronounced synergistic enhancement observed in AMF-litter interactions. Under normal nutrient conditions, only AMF-litter interactions significantly inhibited the development of root system but increased the above-ground biomass in S. canadensis. Relative Interaction Intensity (RII) analysis further revealed that AMF and litter significantly stimulated above-ground growth, with stronger effects under low-nutrient conditions compared to normal nutrient levels. These findings suggest that S. canadensis could adjust the allocation strategies for aboveground-belowground resource by AMF-litter interactions to respond low-nutrient stress. This study provides novel insights into how invasive plant utilize symbiotic AMF and litter interactions to mediate resource allocation under nutrient heterogeneity, advancing our understanding of the mechanism underlying the successful invasion of alien plants.

Key words: plant invasion, nutrient stress, plant-microbe interaction, resource allocation, growth strategy