Biochemical Composition and Photosynthetic Carbon Metabolism of Nutrient Limited Cultures of Merismopedia Tenuissima (Cyanophyceae)1

Konopka, Allan; Schnur, Marilyn

doi:10.1111/j.0022-3646.1981.00118.x

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…From culture studies, the percentage of photosynthate incorporated into proteins is typically higher for algae adapted to low light than to high light (Wallen and Geen 197 1 a; Morris et al 1974;Konopka and Schnur 198 1). When an alga enters the stationary phase of growth or stops dividing due to nutrient limitation, rates of protein synthesis decline and "carbon storage products" are synthesized (Konopka 1983;BenAmotz et al 1985). Nutrient concentrations throughout McMurdo Sound were high enough to make nutrient deficiency unlikely, and water temperatures at the ice edge and under the sea ice were the same.…”

Section: Physical Characteristics Of Environment -mentioning

confidence: 99%

Photoadaptations of photosynthesis and carbon metabolism by phytoplankton from McMurdo Sound, Antarctica. 1. Species‐specific and community responses to reduced irradiances12

Rivkin

Voytek

1987

Limnology & Oceanography

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Irradiance-dependent rates of photosynthesis and photosynthate labeling patterns were measured for phytoplankton in McMurdo Sound, Antarctica. Species-specific and traditional whole-water techniques were used to compare the physiological responses of algae collected in a high light environment at the ice edge and from a low light environment under the annual sea ice. There were differences among species within the same sample, for the same species isolated from high and low light environments, and when species-specific responses were compared with that of the natural assemblage. For algae collected beneath the sea ice, photosynthesis generally saturated at a lower irradiance, and the light-limited region of the P vs. I relationship had a steeper slope than for the same species collected at the ice edge. Low-light-adapted algae incorporated significantly less 14C into proteins and more into low molecular weight compounds and lipids than the same species isolated from a high light environment.Under conditions where reduced rates of protein synthesis were coupled with high rates of carbon uptake, the measurement of photosynthesis may not accurately reflect the physiological condition of the phytoplankton.

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Section: Physical Characteristics Of Environment -mentioning

confidence: 99%

Photoadaptations of photosynthesis and carbon metabolism by phytoplankton from McMurdo Sound, Antarctica. 1. Species‐specific and community responses to reduced irradiances12

Rivkin

Voytek

1987

Limnology & Oceanography

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Enhanced poly-?-hydroxybutyrate accumulation in a unicellular cyanobacterium, Synechocystis sp. PCC 6803

Panda

Mallick

2007

Lett Appl Microbiol

122

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Aim: To stimulate poly‐β‐hydroxybutyrate (PHB) accumulation in Synechocystis sp. PCC 6803 by manipulating culture conditions. Methods and Results: Stationary phase cultures of Synechocystis sp. PCC 6803 were subjected to N‐ and P‐deficiency, chemoheterotrophy and limitations of gas‐exchange. Enhanced PHB accumulation was observed under all the above conditions. However, interaction of P‐deficiency with gas‐exchange limitation (GEL) in the presence of exogenous carbon boosted PHB accumulation maximally. Conclusions: Combined effects of P‐deficiency and GEL boosted PHB accumulation up to 38% (w/w) of dry cell weight (dcw) in Synechocystis sp. PCC 6803 in the presence of fructose and acetate. This value is about eightfold higher as compared with the accumulation under photoautotrophic growth condition. Significance and Importance of the Study: These results showed a good potential of Synechocystis sp. PCC 6803 in accumulating poly‐β‐hydroxybutyrate, an appropriate raw material for biodegradable and biocompatible plastic. Poly‐β‐hydroxybutyrate could be an important material for plastic and pharmaceutical industries.

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Biochemical Composition and Photosynthetic Carbon Metabolism of Nutrient Limited Cultures of Merismopedia Tenuissima (Cyanophyceae)1

Cited by 2 publications

References 17 publications

Photoadaptations of photosynthesis and carbon metabolism by phytoplankton from McMurdo Sound, Antarctica. 1. Species‐specific and community responses to reduced irradiances12

Photoadaptations of photosynthesis and carbon metabolism by phytoplankton from McMurdo Sound, Antarctica. 1. Species‐specific and community responses to reduced irradiances12

Enhanced poly-?-hydroxybutyrate accumulation in a unicellular cyanobacterium, Synechocystis sp. PCC 6803

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