Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium Gloeocapsa alpicola CALU 743
When cells of the unicellular cyanobacterium Gloeocapsa alpicola CALU 743 are deprived of nitrate, the phycobilisomes are actively degraded by a proteolytic process termed chlorosis, which accompanied by decrease of rates of oxygen evolution and carbon dioxide fixation, increase of amount of stored...
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| Format: | Article |
| Language: | English |
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Wiley
2002-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X0200020X |
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| _version_ | 1832561127304724480 |
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| author | Larissa Serebryakova Natalia Novichkova Ivan Gogotov |
| author_facet | Larissa Serebryakova Natalia Novichkova Ivan Gogotov |
| author_sort | Larissa Serebryakova |
| collection | DOAJ |
| description | When cells of the unicellular cyanobacterium Gloeocapsa alpicola CALU 743 are deprived of
nitrate, the phycobilisomes are actively degraded by a proteolytic process termed chlorosis, which accompanied
by decrease of rates of oxygen evolution and carbon dioxide fixation, increase of amount of stored glycogen
and increase of hydrogenase activity. Suspensions of such cells exhibited a capacity for light-dependent
inorganic carbon photoassimilation under anaerobic conditions in the presence of hydrogen and DCMU. The
rate of 14C incorporation was commensurable with that for nitrate-sufficient cells at oxygenic photosynthesis
and reached 35–38 μmol 14Ch-1mg-1 Chl a. Incubation of G. alpicola grown aerobically in the presence of
limiting concentrations of nitrate under anaerobic conditions (Ar, CO2, DCMU) in the light with addition of
nitrate and H2, resulted in the increase of cellular protein, evidencing that G. alpicola cells with high level of
hydrogenase activity are able to perform H2-dependent anoxygenic photosynthesis at levels supporting the
growth of this cyanobacterium. |
| format | Article |
| id | doaj-art-0591b760ff114f8a821908c6ba640cb9 |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2002-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-0591b760ff114f8a821908c6ba640cb92025-02-03T01:25:53ZengWileyInternational Journal of Photoenergy1110-662X2002-01-014416917310.1155/S1110662X0200020XFacultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium Gloeocapsa alpicola CALU 743Larissa Serebryakova0Natalia Novichkova1Ivan Gogotov2Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142190, RussiaInstitute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142190, RussiaInstitute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142190, RussiaWhen cells of the unicellular cyanobacterium Gloeocapsa alpicola CALU 743 are deprived of nitrate, the phycobilisomes are actively degraded by a proteolytic process termed chlorosis, which accompanied by decrease of rates of oxygen evolution and carbon dioxide fixation, increase of amount of stored glycogen and increase of hydrogenase activity. Suspensions of such cells exhibited a capacity for light-dependent inorganic carbon photoassimilation under anaerobic conditions in the presence of hydrogen and DCMU. The rate of 14C incorporation was commensurable with that for nitrate-sufficient cells at oxygenic photosynthesis and reached 35–38 μmol 14Ch-1mg-1 Chl a. Incubation of G. alpicola grown aerobically in the presence of limiting concentrations of nitrate under anaerobic conditions (Ar, CO2, DCMU) in the light with addition of nitrate and H2, resulted in the increase of cellular protein, evidencing that G. alpicola cells with high level of hydrogenase activity are able to perform H2-dependent anoxygenic photosynthesis at levels supporting the growth of this cyanobacterium.http://dx.doi.org/10.1155/S1110662X0200020X |
| spellingShingle | Larissa Serebryakova Natalia Novichkova Ivan Gogotov Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium Gloeocapsa alpicola CALU 743 International Journal of Photoenergy |
| title | Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium
Gloeocapsa alpicola CALU 743 |
| title_full | Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium
Gloeocapsa alpicola CALU 743 |
| title_fullStr | Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium
Gloeocapsa alpicola CALU 743 |
| title_full_unstemmed | Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium
Gloeocapsa alpicola CALU 743 |
| title_short | Facultative H2-dependent anoxygenic photosynthesis in the unicellular cyanobacterium
Gloeocapsa alpicola CALU 743 |
| title_sort | facultative h2 dependent anoxygenic photosynthesis in the unicellular cyanobacterium gloeocapsa alpicola calu 743 |
| url | http://dx.doi.org/10.1155/S1110662X0200020X |
| work_keys_str_mv | AT larissaserebryakova facultativeh2dependentanoxygenicphotosynthesisintheunicellularcyanobacteriumgloeocapsaalpicolacalu743 AT natalianovichkova facultativeh2dependentanoxygenicphotosynthesisintheunicellularcyanobacteriumgloeocapsaalpicolacalu743 AT ivangogotov facultativeh2dependentanoxygenicphotosynthesisintheunicellularcyanobacteriumgloeocapsaalpicolacalu743 |