Identification and functional characteristics of chlorpyrifos-degrading and plant growth promoting bacterium Acinetobacter calcoaceticus.

A bacterial strain D10 with strong ability of degrading chlorpyrifos was isolated from rhizosphere of chives contaminated with pesticide. It was found that it's capable of utilizing chlorpyrifos as the sole source of carbon for growth, and within the first 4 days the extent of degradation at initial concentration of 100 mg L(-1) was 60.0%. It also showed a high ability of degrading chlorpyrifos in sterilized soil, and the degradation reached up to 60.2% after 18 days. In addition, the strain D10 also showed multiple plant growth-promoting traits of phosphate solubilization, indole-3-acetic acid and siderophore production. The results indicate that the strain D10 has potential in the application of pesticide-degrading and plant growth promotion. Strain D10 was identified as Acinetobacter calcoaceticus based on its morphological, physiological-biochemical properties and the 16S rRNA sequence analysis.

Zhao L ，Wang F ，Zhao J 《-》

Characterization of plant-growth-promoting traits of Acinetobacter species isolated from rhizosphere of Pennisetum glaucum.

Rokhbakhsh-Zamin F ，Sachdev D ，Kazemi-Pour N ，Engineer A ，Pardesi KR ，Zinjarde S ，Dhakephalkar PK ，Chopade BA ... -  《-》

Acinetobacter strains IH9 and OCI1, two rhizospheric phosphate solubilizing isolates able to promote plant growth, constitute a new genomovar of Acinetobacter calcoaceticus.

Peix A ，Lang E ，Verbarg S ，Spröer C ，Rivas R ，Santa-Regina I ，Mateos PF ，Martínez-Molina E ，Rodríguez-Barrueco C ，Velázquez E ... -  《-》

Cold-adapted and rhizosphere-competent strain of Rahnella sp. with broad-spectrum plant growth-promotion potential.

Vyas P ，Joshi R ，Sharma KC ，Rahi P ，Gulati A ，Gulati A ... -  《-》

Assessment of 16S rRNA gene-based phylogenetic diversity and promising plant growth-promoting traits of Acinetobacter community from the rhizosphere of wheat.

Strains belonging to the genus Acinetobacter and their plant growth-promoting properties have been reported in the literature. However, there is a paucity of information on the diversity of Acinetobacter species associated with the wheat rhizosphere. In the present investigation, Acinetobacter species diversity was assessed in the rhizosphere of wheat from three agricultural fields where different varieties were cultivated. The Acinetobacter species diversity was assessed by DGGE (Denaturing Gradient Gel Electrophoresis) of 16S rRNA gene PCR products amplified from total soil DNA using genus-specific primers. Ac. calcoaceticus, Ac. baumannii, Ac. lwoffii, Ac. baylyi and Acinetobacter sp. were detected in the rhizosphere of wheat. Prevalence of Acinetobacter species in the rhizosphere of wheat was also investigated by a cultivation-dependent approach. Ac. calcoaceticus, Ac. baumannii, Ac. lwoffii and Acinetobacter sp. were isolated on selective media from the same samples. In vitro characterization of Acinetobacter isolates revealed that majority of these bacteria exhibited plant growth-promoting traits such as nitrogen fixation, siderophore production and mineral solubilization. These Acinetobacter strains may play a favorable role in plant growth promotion while residing in the rhizosphere of wheat.

Sachdev D ，Nema P ，Dhakephalkar P ，Zinjarde S ，Chopade B ... -  《-》