Root-derived low molecular weight organic acids modulate keystone microbial taxa impacting plant phosphorus acquisition.

Introduction: Low-molecular-weight organic acids (LMWOAs) present in root exudates modulate the assembly and function of phosphorus (P)-mobilizing bacteria in the rhizosphere. Nonetheless, relatively little is known about how specific LMWOAs affect the structure of rhizosphere microbes associated with P cycling.

Objectives: This study aimed to elucidate the mechanisms by which LMWOAs affect the recruitment of P-mobilizing bacterial communities, with implications for P bioavailability and plant P uptake.

[Effects of Organic Fertilization on Bacterial Community and Maize Productivity in Dryland Red Soil].

Since 2002, a long-term field experiment has been conducted to determine the effects of different organic fertilization treatments on the bacterial community characteristics and maize productivity in dryland red soil using high-throughput sequencing technology. The experiment consisted of four treatments:no manure, M0; low manure, M1; high manure, M2; and high manure with lime addition, M3. Our results showed that the different organic fertilization treatments(M1, M2, and M3) significantly promoted maize productivity with the highest values of pH, soil organic matter(SOM), total nitrogen(TN), and total phosphorus(TP) compared to that under the M0 treatment, and the high manure with lime addition(M3) treatment had the highest level of maize production.

Cadmium tolerance in Elodea canadensis Michx: Subcellular distribution and metabolomic analysis.

The aquatic plant Elodea canadensis is considered a good candidate for ecotoxicological investigations. Cadmium (Cd) is a widespread contaminant in aquatic systems. In this study, to better elucidate the underlying tolerance mechanism and molecular impact of environmentally relevant Cd concentration in aquatic plants, subcellular distribution, chemical forms, and gas chromatography-mass spectrometry-based non-targeted metabolomics profiles were comprehensively analyzed in E.