Resource Type

Journal Article 2

Year

2020 1

2011 1

Keywords

Acclimation 1

Chromate resistance 1

Detoxification 1

Efflux pumps 1

Environmental biotechnology 1

enhanced biological phosphorus removal (EBPR) 1

fluorescent in situ hybridization (FISH) 1

temperature variation 1

tetrad forming organisms (TFOs) 1

open ︾

Search scope:

排序: Display mode:

Short-term effect of temperature variation on the competition between PAOs and GAOs during acclimation

Nanqi REN, Han KANG, Xiuheng WANG, Nan LI

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 277-282 doi: 10.1007/s11783-010-0226-x

Abstract: Sequencing batch reactor (SBR) for enhanced biological phosphorus removal (EBPR) processes was used to investigate the impact of the temperature shock on the competition between phosphorus-accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) in start-up stage. During the 34 days operation, SBR was set with temperature variation(0–5 d, 22±1°C; 6–13 d, 29±1°C; 14–34 d, 14±1°C). PAOs and GAOs were analyzed by fluorescent in situ hybridization (FISH), and intracellular polyphosphate granules were stained by Neisser-stain. The results showed that the influence of temperature shock on PAOs’ abundance was more serious than that on GAOs in the enriching process. Under sudden and substantially temperature variation, from 22±1°C to 29±1°C and then to 14±1°C, the domination of PAOs was deteriorated. After temperature shock, PAOs’ competitive advantages at low temperature that concluded in other study did not appear in our study. As mesophilic, GAOs (indicated by and ) were more temperature adaptive and better grew and took the domination at 14±1°C in the end. In the competition process, organisms of tetrad forming organisms (TFOs)-like shape which were considered as typical GAOs, were observed. With the evidence of poly-P granules containing by Neisser-straining and result of FISH, these organisms of TFOs-like shape were better to be assumed as adaption state or a special self-protecting shape of PAOs.

Keywords: fluorescent in situ hybridization (FISH)     tetrad forming organisms (TFOs)     temperature variation     enhanced biological phosphorus removal (EBPR)    

Long-term adaptive evolution of

Yong Xiao, Changye Xiao, Feng Zhao

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1182-8

Abstract: Whole genomes from 7 populations at different acclimation stages were sequenced.Acclimation is the main method to enhance the productivity of microorganisms in environmental biotechnologyuncertain how microorganisms acquire resistance to high concentrations of pollutants during long-term acclimationresults provide an in-depth analysis of how Cr(VI) resistance of S. oneidensis MR-1 is improved by acclimation

Keywords: Environmental biotechnology     Acclimation     Chromate resistance     Efflux pumps     Detoxification    

Title Author Date Type Operation

Short-term effect of temperature variation on the competition between PAOs and GAOs during acclimation

Nanqi REN, Han KANG, Xiuheng WANG, Nan LI

Journal Article

Long-term adaptive evolution of

Yong Xiao, Changye Xiao, Feng Zhao

Journal Article