Isolation, characterization and the effect of indigenous heavy metal-resistant plant growth-promoting bacteria on sorghum grown in acid mine drainage polluted soils.

Isolation, characterization and the effect of indigenous heavy metal-resistant plant growth-promoting bacteria on sorghum grown in acid mine drainage polluted soils. J Gen Appl Microbiol. 2019 Jun 27;: Authors: Wu Z, Kong Z, Lu S, Huang C, Huang S, He Y, Wu L Abstract The research purpose was the characterization of indigenous heavy metal-resistant plant growth-promoting bacteria (PGPB) from the farmlands located on the Le'an River basin contaminated by acid mine drainage and their effects on plant growth, nutrient uptake, antioxidant enzyme activities and metal accumulation. The plant growth-promoting (PGP) traits, including 1-aminocyclopropane-1-carboxylic acid deaminase, indoleacetic acid, siderophore, ammonia production and phosphate solubilization, as well as antibiotics, acid/alkali and salt resistance were determined. Ten isolates with relatively high PGP activities were identified to belong to the genera Burkholderia, Paraburkholderia, Cupriavidus, Pseudomonas and Ralstonia. The numerical classification based on bacterial resistant characteristics was mostly consistent with their phylogenetic positions. Burkholderia sp. strain S6-1 and Pseudomonas sp. strain S2-3 possessed both greater PGP activities and resistant characteristics in overall comparison. Compared with non-inoculated plants, strains S6-1 and S2-3 significantly increased the height, dry weight and N uptake of sorghum (Sorghum bicolor L.). The presence of S6-1 sig...
Source: Journal of General and Applied Microbiology - Category: Microbiology Tags: J Gen Appl Microbiol Source Type: research