Phospholipid FA of piezophilic bacteria from the deep sea

Fang, Jiasong; Chan, Olivia; Kato, Chiaki; Sato, Takako; Peeples, Tonya L.; Niggemeyer, Karl

doi:10.1007/s11745-003-1140-7

Cited by 39 publications

(15 citation statements)

References 11 publications

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“…Other pressure-adapted isolates from the Gammaproteobacteria that are commonly studied include Moritella japonica (419) and Photobacterium profundum (420,576), both of which are psychrophiles. M. japonica has been used as a model to examine how cell wall composition-lipid composition in particular-varies with pressure, which revealed that phospholipid fatty acid content decreases with increasing pressure (152). P. profundum grows well in marine agar 2216 at low temperature and moderate pressure, making it an easy target for laboratory studies.…”

Section: Cultivated Prokaryotes From the Dark Oceanmentioning

confidence: 99%

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor

Orcutt

Sylvan

Knab

et al. 2011

Microbiol Mol Biol Rev

598

499

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SUMMARY The majority of life on Earth—notably, microbial life—occurs in places that do not receive sunlight, with the habitats of the oceans being the largest of these reservoirs. Sunlight penetrates only a few tens to hundreds of meters into the ocean, resulting in large-scale microbial ecosystems that function in the dark. Our knowledge of microbial processes in the dark ocean—the aphotic pelagic ocean, sediments, oceanic crust, hydrothermal vents, etc.—has increased substantially in recent decades. Studies that try to decipher the activity of microorganisms in the dark ocean, where we cannot easily observe them, are yielding paradigm-shifting discoveries that are fundamentally changing our understanding of the role of the dark ocean in the global Earth system and its biogeochemical cycles. New generations of researchers and experimental tools have emerged, in the last decade in particular, owing to dedicated research programs to explore the dark ocean biosphere. This review focuses on our current understanding of microbiology in the dark ocean, outlining salient features of various habitats and discussing known and still unexplored types of microbial metabolism and their consequences in global biogeochemical cycling. We also focus on patterns of microbial diversity in the dark ocean and on processes and communities that are characteristic of the different habitats.

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Section: Cultivated Prokaryotes From the Dark Oceanmentioning

confidence: 99%

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor

Orcutt

Sylvan

Knab

et al. 2011

Microbiol Mol Biol Rev

598

499

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show abstract

“…This likely represents an upper-estimate of this parameter because the sample came from the upper MPZ and the collection method made no attempt to distinguish between non-living detritus and (DHA-rich) organismal biomass. The DHA:C content of particle-attached bacteria (θ B = 0.08 mmol mol −1 ) represents an average value derived from various culture studies on deep-sea microbes (θ B = 0.11, 0.11, 0.03; Fang et al, 2002, 2003, 2004, respectively). The DHA:C content of protistan bacterivores (θ H = 1.4 mmol mol −1 ) is an average value for the heterotrophic dinoflagellate, Oxyrrhis marina , reared on the algae Rhodomonas sp.…”

Section: Model Descriptionmentioning

confidence: 99%

The Role of Microbes in the Nutrition of Detritivorous Invertebrates: A Stoichiometric Analysis

2017

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Detritus represents an important pool in the global carbon cycle, providing a food source for detritivorous invertebrates that are conspicuous components of almost all ecosystems. Our knowledge of how these organisms meet their nutritional demands on a diet that is typically comprised of refractory, carbon-rich compounds nevertheless remains incomplete. “Trophic upgrading” of detritus by the attached microbial community (enhancement of zooplankton diet by the inclusion of heterotrophic protozoans) represents a potential source of nutrition for detritivores as both bacteria and their flagellated protistan predators are capable of biosynthesizing essential micronutrients such as polyunsaturated fatty acids (PUFAs). There is however a trade-off because although microbes enhance the substrate in terms of its micronutrient content, the quantity of organic carbon is diminished though metabolic losses as energy passes through the microbial food web. Here, we develop a simple stoichiometric model to examine this trade-off in the nutrition of detritivorous copepods inhabiting the mesopelagic zone of the ocean, focusing on their requirements for carbon and an essential PUFA, docosahexaenoic acid (DHA). Results indicate that feeding on microbes may be a highly favorable strategy for these invertebrates, although the potential for carbon to become limiting when consuming a microbial diet exists because of the inefficiencies of trophic transfer within the microbial food web. Our study highlights the need for improved knowledge at the detritus-microbe-metazoan interface, including interactions between the physiology and ecology of the associated organisms.

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“…Polyunsaturated fatty acids (PUFAs) such as eicosapentaenoic acid (EPA; C20:5) and docosahexaenoic acid (DHA; C22:6) are commonly distributed in the membranes of deep-sea piezophiles (Fang et al 2003;Valentine and Valentine 2004). Because of the bulky conformation, incorporation of these PUFAs into the membrane is assumed to compensate for membrane packing caused by high pressure or low temperature, thus aiding higher membrane fluidity.…”

Section: Role Of Polyunsaturated Fatty Acids In Piezo-adaptationmentioning

confidence: 99%

High Pressure Bioscience

Akasaka¹,

Matsuki²

2015

Subcellular Biochemistry

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The book series SUBCELLULAR BIOCHEMISTRY is a renowned and well recognized forum for disseminating advances of emerging topics in Cell Biology and related subjects. All volumes are edited by established scientists and the individual chapters are written by experts on the relevant topic. The individual chapters of each volume are fully citable and indexed in Medline/Pubmed to ensure maximum visibility of the work.

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Phospholipid FA of piezophilic bacteria from the deep sea

Cited by 39 publications

References 11 publications

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor

The Role of Microbes in the Nutrition of Detritivorous Invertebrates: A Stoichiometric Analysis

High Pressure Bioscience

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