【摘要】 根系分泌物(root exudates, REs)是从植物根部主动或被动释放的一组化合物,持续给根际土壤提供养分和能量,进而改变了土壤营养环境并吸引特定微生物在根际富集。这些化合物不仅能辅助根系定植,而且也是植物、土壤和微生物之间相互作用的基础。在植物根系与土壤微生物相互作用的过程中形成的互利共生或竞争的关系,体现了两者在漫长进化过程中形成的资源获取策略。REs启动和调节植物根系—土壤—微生物之间的对话,在土壤生态系统中发挥着关键作用。通过回顾影响REs的潜在因素,对REs组成种类和调节功能进行归纳总结,并剖析了REs介导的植物与根际微生物的相互作用以及阐释了REs在森林生态系统中的重要性。此外,进一步以REs介导的植物—土壤—微生物互作关系为主题展开论述,以期为全面理解REs对植物和土壤群落间动态反馈作用的相关研究提供参考,进而有助于深入认识森林生态系统地下过程以及全面揭示土壤微生物对森林树种多样性的维持作用。更多还原

【Abstract】 Root exudates(REs), organic compounds actively or passively released by plant roots into the rhizosphere, continuously supply nutrients and energy to soil. This process drives changes in soil nutrient dynamics and recruits specific microorganisms to enrich the rhizosphere. REs form the biochemical foundation for plant-soil-microbe interactions, facilitating root establishment. The mutualistic or competitive relationships emerging from these interactions reflect evolutionarily honed resource acquisition strategies. Crucially, REs initiate and regulate root-soil-microbe communication within soil systems. This review systematically examines factors influencing REs,summarizes their composition and regulatory roles, and comprehensively analyzed RE-mediated plant-rhizosphere microbe interactions.Furthermore, REs’ ecological significance in forest ecosystems has been explored, focusing on their involvement in plant-soil-microbe feedback. This synthesis advances understanding of RE contributions to plant-soil feedback mechanisms, which is essential for deciphering forest biodiversity maintenance.更多还原