Factors influencing cadmium accumulation in plants after inoculation with rhizobacteria: A meta-analysis.

Rhizobacteria have the potential to enhance phytoremediation by generating substances that stimulate plant development and influence the effectiveness of cadmium (Cd) remediation by adjusting Cd availability via metal solubilization. Furthermore, rhizobacterial inoculation affects plants' metal tolerance and uptake by controlling the expression of several metal transporters, channels, and metal chelator genes. A meta-analysis was conducted to quantitatively assess the effects of rhizobacteria on Cd accumulation in plants using 207 individual observations from 47 articles.

Transcriptome Response to Heavy Metals in Sinorhizobium meliloti CCNWSX0020 Reveals New Metal Resistance Determinants That Also Promote Bioremediation by Medicago lupulina in Metal-Contaminated Soil.

The symbiosis of the highly metal-resistant CCNWSX0020 and has been considered an efficient tool for bioremediation of heavy metal-polluted soils. However, the metal resistance mechanisms of CCNWSX00200 have not been elucidated in detail. Here we employed a comparative transcriptome approach to analyze the defense mechanisms of CCNWSX00200 against Cu or Zn exposure.

Functional characterization of a csoR-cueA divergon in Bradyrhizobium liaoningense CCNWSX0360, involved in copper, zinc and cadmium cotolerance.

Random mutagenesis in a symbiotic nitrogen-fixing Bradyrhizobium liaoningense CCNWSX0360 (Bln0360) using Tn5 identified five copper (Cu) resistance-related genes. They were functionally sorted into three groups: transmembrane transport (cueA and tolC); oxidation (copA); and protection of the membrane barrier (lptE and ctpA). The gene cueA, together with the upstream csoR (Cu-sensitive operon repressor), constituted a csoR-cueA divergon which plays a crucial role in Cu homeostasis.

Zinc Resistance Mechanisms of P1B-type ATPases in Sinorhizobium meliloti CCNWSX0020.

The Sinorhizobium meliloti (S. meliloti) strain CCNWSX0020 displayed tolerance to high levels exposures of multiple metals and growth promotion of legume plants grown in metal-contaminated soil. However, the mechanism of metal-resistant strain remains unknown.

An omp gene enhances cell tolerance of Cu(II) in Sinorhizobium meliloti CCNWSX0020.

The main aim of this work was to study molecular characterization of a DNA fragment conferring resistance to Cu(II) in Sinorhizobium meliloti CCNWSX0020. The strain CCNWSX0020, resistant to 1.4 mmol l(-1) Cu(II) in tryptone-yeast extract medium was isolated from Medicago lupulina growing in mine tailings of Fengxian County, China.