Arbuscular mycorrhizal fungi colonization facilitates nitrogen uptake in cotton under nitrogen - reduction condition

Therefore, under nitrogen - reduction condition, roots will be more dependent on the contribution of mycelium to NO₃⁻-N, and AMF colonization was significantly positively correlated with root tissue density (P < 0.05), suggesting that mycelium may prolong its functional cycle by improving the root structure, thereby reducing the carbon and nitrogen consumption in host organ reconstruction. However, this mechanism needs to be further verified in combination with the direct measurement of root turnover rate.