Pressure effects on in vivo microbial processes

Bartlett, Douglas H.

doi:10.1016/s0167-4838(01)00357-0

Cited by 412 publications

(316 citation statements)

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“…There is growing interest in understanding microbes and potential applications of them in these extreme environments that have significant impacts on them. [1][2][3][4][5] In addition to this interest in deep-sea life, high-pressure treatment of food has been studied as a novel technique to pasteurize food without a heating process, and an increasing number of food products treated under high pressure have been commercialized. [6][7][8][9] High hydrostatic pressures, in the range of several dozen MPa, are generally assumed to be nonlethal but exert adverse effects on the growth of organisms that are adapted to atmospheric pressure.…”

mentioning

confidence: 99%

“…[6][7][8][9] High hydrostatic pressures, in the range of several dozen MPa, are generally assumed to be nonlethal but exert adverse effects on the growth of organisms that are adapted to atmospheric pressure. 2,4,10) Those effects depend not only on the magnitude but also on the duration of pressure applied in combination with temperature, pH, oxygen supply and composition of culture media. Accordingly, the effects are very complex, making interpretation difficult.…”

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confidence: 99%

“…The physiology, genetics, applications and phylogenetics of deep-sea piezophiles have been reviewed elsewhere. [3][4][5]13,14) …”

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confidence: 99%

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Exploration of the Effects of High Hydrostatic Pressure on Microbial Growth, Physiology and Survival: Perspectives from Piezophysiology

Abe

2007

Bioscience, Biotechnology, and Biochemistry

177

110

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Exploration of the Effects of High Hydrostatic Pressure on Microbial Growth, Physiology and Survival: Perspectives from Piezophysiology

Abe

2007

Bioscience, Biotechnology, and Biochemistry

177

110

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“…However, the test strain used every time was from a pure culture of a single colony, and thus the yeast cells in suspension should be uniform, so the latter possibility is very small. Although the mutation induced by HHP for improving microbes has not been studied in detail (Bartlett, 1992(Bartlett, , 2002, several observations related to this suggested that it is a complex physiological process. Wuytack et al (2002) of sublethal injuries, ultimately leading to death.…”

Section: Change Of Barotolerance Of Parental Strain R68mentioning

confidence: 99%

“…Elevated pressure can exert detrimental effects on microorganisms and enzymes (Bartlett, 2002), and thus the potential use of HHP technology as a novel food preservation method is currently being investigated (Basak et al, 2002;Ritz et al, 2002). Because of its effects on the gene and protein expression of microorganisms (Bartlett et al, 1995), mutations induced by HHP are also possible, e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of high hydrostatic pressure on the growth and β‐carotene production of Rhodotorula glutinis

Wang

Chen²,

Deng³

et al. 2008

Yeast

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The effects of high hydrostatic pressure (HHP) on the biomass and β-carotene biosynthesis of Rhodotorula glutinis R68 were studied. After treatment with five repeated cycles at 300 MPa for 15 min, the barotolerant mutant PR68 was obtained. After 72 h of culture, the biomass of mutant PR68 was 21.6 g/l, decreased by 8.5% compared to the parental strain R68, but its β-carotene production reached 19.4 mg/l, increased by 52.8% compared to the parental strain R68. The result of restriction fragment length polymorphism (RFLP) analysis suggested that mutant strain PR68 was likely to change in nucleic acid level, and thus enhanced β-carotene production in this strain as a result of gene mutation induced by HHP treatment.

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Piezophiles

Yayanos

2020

Encyclopedia of Life Sciences

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Organisms functioning best at high pressures are known as piezophiles. Piezophilic microorganisms, the main topic here, have a growth rate ( k ) maximum at high pressure, are prominent inhabitants of the cold ocean and found in warmer high pressure regions such as the deep waters of the Mediterranean and Sulu Seas, deep‐sea hydrothermal vent environments, the depths of sea floor sediments and the subsurface of continents. A PTk ‐diagram shows values of k of a microorganism as a function of temperature ( T ) and pressure ( P ) either on a 3‐D surface or as isopleths on a 2‐D contour map and allows for comparing organisms from habitats of disparate temperatures and pressures. Laboratory studies of piezophilic eukaryotic organisms from the abyssal and hadal ocean are rare. At the present time, research on piezophilic prokaryotes offers the best opportunity for discovering adaptations for life in the deep sea, in deep‐earth environments and in extraterrestrial settings. Key Concepts Pressure is a force per unit area and at any given point in a fluid at rest is equal in every direction. High‐pressure habitats are found in the deep sea, beneath the sea floor and in the depths of continents. Collecting living organisms from extreme high‐pressure habitats requires specialised equipment. Laboratory study of organisms from high‐pressure habitats also requires specialised equipment. Temperature and pressure are two of the essential coordinate variables for describing a habitat or environment.

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Pressure effects on in vivo microbial processes

Cited by 412 publications

References 121 publications

Exploration of the Effects of High Hydrostatic Pressure on Microbial Growth, Physiology and Survival: Perspectives from Piezophysiology

Exploration of the Effects of High Hydrostatic Pressure on Microbial Growth, Physiology and Survival: Perspectives from Piezophysiology

Effects of high hydrostatic pressure on the growth and β‐carotene production of Rhodotorula glutinis

Piezophiles

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