Oerskovia flava sp. nov., a deoxynivalenol (DON)-degrading actinomycete isolated from the rhizosphere soil of long-term continuous cropping cucumber.

The deoxynivalenol (DON)-degrading bacterium JB1-3-2 was isolated from a rhizosphere soil sample of cucumber collected from a greenhouse located in Zhenjiang, Eastern China. The JB1-3-2 strain is a Gram-stain-positive, nonmotile and round actinomycete. Growth was observed at temperatures between 15 and 40 ℃ (optimum, 35 ℃), in the presence of 15% (w/v) NaCl (optimum, 3%), and at pH 3 and 11 (optimum, 7).

Nocardioides limicola sp. nov., an alkaliphilic alkane degrading bacterium isolated from oilfield alkali-saline soil.

A Gram-stain-positive, rod-shaped, non-spore-forming, alkane degrading bacterium, designated DJM-14, was isolated from oilfield alkali-saline soil in Heilongjiang, Northeast China. On the basis of 16 S rRNA gene sequencing, strain DJM-14 was shown to belong to the genus Nocardioides, and related most closely to Nocardioides terrigena KCTC 19,217 (95.53% 16 S rRNA gene sequence similarity).

Cold Plasma Controls Nitrite Hazards by Modulating Microbial Communities in Pickled Radish.

The hazard of nitrite caused by microorganisms is the main food safety problem in the pickle production. To seek a method to control the nitrite hazards of pickles by regulating microbial community without additional substances, we focused on cold plasma because Gram-negative and Gram-positive bacteria have different degrees of sensitivity to the sterilization of cold plasma. Using radish pickles as the experimental object, based on colony counting, dynamic monitoring of pH and nitrite, qPCR and high-throughput sequencing, it was found that when the raw material was treated with dielectric barrier discharge (DBD) cold plasma at 40 kV for 60 s, Gram-negative bacteria with the potential to produce nitrite were preferentially sterilized.

Alcanivorax limicola sp. nov., isolated from a soda alkali-saline soil.

An alkaliphilic and aerobic bacterium, designated as strain JB21, was isolated from a soda alkali-saline soil sample in Heilongjiang, Northeast China. Strain JB21 is a Gram-stain-negative, rod-shaped, non-motile and amylase-positive bacterium. Growth occurred at 15-45 °C (optimum, 35-37 °C), in the presence of 0-15.