ArticleWorld journal of microbiology & biotechnology2016
Cold stress promoting a psychrotolerant bacterium Pseudomonas fragi P121 producing trehaloase.
Article in World journal of microbiology & biotechnology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 16 citations in OpenAlex.
- Elucidation of cold adaptation inFrontiers in microbiology · 2023Article
- Trehalose in pine wood nematode participates in DJ3 formation and confers resistance to low-temperature stress.BMC genomics · 2021Article
- Characterization of the biofilm matrix composition of psychrotrophic, meat spoilage pseudomonads.Scientific reports · 2020Article
- Infection ofFrontiers in microbiology · 2020Article
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Authors and funding
5 authors at 2 institutions in 1 country.
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Abstract
A newly isolated Pseudomonas fragi P121 strain in a soil sample taken from the Arctic Circle is able to produce trehalose. The P121 strain was able to grow at temperatures ranging from 4 to 25 °C, had an optimum pH of 6.5, and an optimum salt concentration of 2 %. The P121 strain had a survival rate of 29.1 % after being repeatedly frozen and thawed five times, and a survival rate of 78.9 % when placed in physiological saline for 15 days at 20 °C after cold shock, which is far higher than the type strain Pseudomonas fragi ATCC 4973. The P121 strain could produce 2.89 g/L trehalose, which was 18.6 % of dry cell weight within 52 h in a 25 L fermention tank using the malt extract prepared from barley as medium at 15 °C, while only 11.8 % of dry cell weight at 20 °C. These results suggested that cold stress promoted the strain producing trehalose. It is the first reported cold-tolerant bacterium that produces trehalose, which may protect cells against the cold environment.
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