Plant-rhizosphere microbe interactions and their roles in nitrogen cycles under periodic flooding: From cooperation mechanisms to ecological responses

作者：Tianpeng Gao, Yi Li, Nan Yang, Wei Xiong, Xiaodan Liang, Yingjie Wang · 发表于：Critical Reviews in Environmental Science and Technology · 年份：2025 · DOI：10.1080/10643389.2025.2530941 · 被引用次数：17 · 研究领域：Plant responses to water stress、Microbial Community Ecology and Physiology、Legume Nitrogen Fixing Symbiosis

Periodic flooding in riparian zones induces significant environmental heterogeneity that sustains unique plant-microbe symbioses, functioning as key regulators of nitrogen (N) cycling under intensifying anthropogenic nutrient inputs. While extensive studies have characterized diversity and functional dynamics of rhizosphere microbial communities participating in N cycles, they often overlook the roles of host plants and lack comprehensive elucidation of both assembly mechanisms underlying riparian plant-rhizosphere microbe symbioses and their regulation on N cycling under periodic flooding. Here, we systematically synthesize current advances in deciphering formation mechanisms and functional dynamics of riparian plant-rhizosphere microbe symbioses through molecular perspectives, with particular focus on their roles in N cycles. Specifically, we first clarify the mechanisms governing root exudates production and release in riparian systems, followed by detailed examination of microbial colonization strategies—including biofilm formation and mycorrhizal associations—that are mechanistically mediated by root-derived signaling molecules. Building on these insights, we propose a coevolutionary framework where plant-regulated exudates, rhizosphere oxygen gradients, and microbial enzyme activities collectively modulate N cycling under hydrological fluctuations. Furthermore, we delineate how hydrodynamics, soil properties, exogenous pollutant inputs, and iron plaques interactively sh...