Results 131 to 140 of about 1,047 (158)
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Photoautotrophy in Gymnodinium breve Davis
Science, 1962Pure cultures of the Florida "red-tide" flagellate required light and carbon dioxide for growth. Multiplication in darkness was not supported by any of a number of organic compounds and mixtures. The ecological importance of micronutrients is suggested.
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Isolation of mutants of the cyanobacterium,Anabaena variabilis, impaired in photoautotrophy
Archives of Microbiology, 1978Mutants ofAnabaena variabilis Kutz. that have a decreased ability to grow photoautotrophically have been isolated by a modification of the techniques used to isolate auxotrophic mutants of that filamentous cyanobacterium, and have been stably propagated. Three mutants have a reduced content of phycocyanin and, as determined by in situ assays of partial
Paul W. Shaffer +2 more
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Evolution of Photoautotrophy and Early Atmospheric Oxygen Levels
Precambrian Research, 1983Abstract Current photochemical models suggest that oxygen levels in the prebiological atmosphere were extremely low, most probably remaining in the range 10−8–10−14 PAL (present atmospheric level). It is, therefore, reasonable to assume that only life processes were able to overwhelm these minor O2-pressures, with free oxygen resulting from the ...
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Planta, 1981
Protoplasts of a cytoplasmic albino mutant of Nicotiana tabacum L. characterized by a deficient chloroplast genome were fused with protoplasts of a nitrate-reductase deficient mutant (NR(-)) of N. tabacum. Somatic hybrids were obtained where the genome of the NR(-) mutant was complemented by the cytoplasmic albino mutant which could synthesize an ...
K, Glimelius, H T, Bonnett
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Protoplasts of a cytoplasmic albino mutant of Nicotiana tabacum L. characterized by a deficient chloroplast genome were fused with protoplasts of a nitrate-reductase deficient mutant (NR(-)) of N. tabacum. Somatic hybrids were obtained where the genome of the NR(-) mutant was complemented by the cytoplasmic albino mutant which could synthesize an ...
K, Glimelius, H T, Bonnett
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Gloomy predictions – modelling photoautotrophy in low‐light environments
New Phytologist, 2000How plants gather their resources, harvest solar energy and convert raw materials into an increased biomass is one of the enduring fascinations of biological science. Just about every step has been charted by biochemists and few processes have escaped the determination of a rate constant by physiologists.
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Plant Cell, Tissue and Organ Culture, 1996
This paper reports on the fast fluorescence responses of Gardenia jasminoides Ellis plantlets, at two successive stages (shoot multiplication and root induction) of culture in vitro. We test whether plantlets in vitro suffer photoinhibition during culture and whether the degree of photoautotrophy of these mixotrophic plantlets has any effect on the ...
Maria D. Serret +3 more
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This paper reports on the fast fluorescence responses of Gardenia jasminoides Ellis plantlets, at two successive stages (shoot multiplication and root induction) of culture in vitro. We test whether plantlets in vitro suffer photoinhibition during culture and whether the degree of photoautotrophy of these mixotrophic plantlets has any effect on the ...
Maria D. Serret +3 more
exaly +2 more sources
Early atmospheric oxygen levels: constraints from Archaean photoautotrophy
Journal of the Geological Society, 1984Various independent lines of evidence suggest that photoautotrophic carbon fixation is a very ancient process that had attained control of the terrestrial carbon cycle from at least 3.5 Ga (if not 3.8 Ga). Since it is generally accepted that only biological processes could substantially increase the negligible oxygen pressures sustained on
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Acquisition of photoautotrophy in kleptoplastic dinoflagellates-Nusuttodinium aeruginosum/acidotum as a case study [PDF]
, 2018 The integration of stable plastids by endosymbiosis led to an enormous diversity of photosynthetic eukaryotic organisms on earth. However, the steps during the establishment of a stable endosymbiosis are poorly understood. To address this early step of evolution, many studies have been performed on organisms with transient plastids.
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Photoautotrophy in Gymnodinium breve Davis
Deep Sea Research and Oceanographic Abstracts, 1964openaire +1 more source