Mycorrhizal suppression decouples the coordination of plant functional traits that mediate nitrogen acquisition under different soil water contents in a subtropical wetland ecosystem

In subtropical wetland ecosystems, climate change can alter both the composition of nitrogen (N) deposition and levels soil water, affecting nutrient acquisition. Arbuscular mycorrhizal fungi (AMF) regulate effects water availability NH 4 + : NO 3 − ratio on plant N However, exactly how acquisition is affected by content AMF symbiosis remains unclear. We transplanted dominant species, Carex thunbergii , collected in freshwater wetlands our study area southern China, into microcosms a greenhouse experiment. this context, we were able to manipulate amount supply soil, combined with without symbiosis. Three months after treatments imposed, examined N-uptake rate, along growth functional traits, response these experimental manipulations. Soil dominated level growth, whereas variations traits (e.g., specific root length, SRL, leaf area, SLA) could largely be ascribed ratio. Collectively, plant-AMF enhanced under conditions variable availability, for instance promoting rate more at lower (30%) compared higher water(70%), also when was applied 3:1 other ratios. SLA significantly negatively correlated thus indirectly contributed suppression decoupled coordination between mainly rather than SLA, which remained stable. The correlations adjusted symbiosis, crucial use strategies. • C. greatly uptake. A negative relationship found SRL presence AMF. Mycorrhizal above- belowground traits.