Diversity and correlation analysis of different root exudates on the regulation of microbial structure and function in soil planted with .

Introduction: Specific interactions between root exudates and soil microorganisms has been proposed as one of the reasons accounting for the continuous cropping obstacle (CCO) of . However, rotation of other crops on soils planted with (SPP) did not show CCO, suggesting that root exudates of different crops differentially regulate soil microorganisms in SPP.

Methods: Here, we investigated the microbial community structure and specific interaction mechanisms of the root exudates of the four plant species, (Pn), (Zm), (Nt) and (Pf), in SPP by static soil culture experiment.

Oxalate in Plants: Metabolism, Function, Regulation, and Application.

Characterized by strong acidity, chelating ability, and reducing ability, oxalic acid, a low molecular weight dicarboxylic organic acid, plays important roles in the regulation of plant growth and development, the response to both biotic and abiotic stresses such as plant defense and heavy metals detoxification, and food quality. The metabolism of oxalic acid has been well-studied in microorganisms, fungi, and animals but remains less understood in plants. However, excessive accumulation of oxalic acid is detrimental to plants.