Results 161 to 170 of about 4,485 (193)
Some of the next articles are maybe not open access.
Autotrophy and heterotrophy in root herniparasites
Trends in Ecology & Evolution, 1989More than 3000 species of flowering plants are at least partially parasitic, acquiring water and solutes from the host via haustoria. More than one third of all parasitic angiosperms - the root hemiparasites - possess green leaves and root systems.
openaire +2 more sources
Lake Koronia, Greece: Shift from autotrophy to heterotrophy with cultural eutrophication and progressive water-level reduction [PDF]
Limnologica, 2004 Lake Koronia, a Ramsar site, is shallow, polymictic, hypertrophic and until recently was aerially the fourth largest lake in Greece. Although exceeding 5 m in the past, lake depth has declined progressively from 3.8 m in 1980 to < 1 m in 1997, reducing ...
George Zalidis
exaly +2 more sources
Autotrophy in Stream Ecosystems
BioScience, 1978where the import of organic matter from outside the system is the predominant feature. Little has been done to test the hypotheses derived from these systems against information obtained from other lotic systems in different vegetational regimes (biomes) or arising along a single river system from its source to the sea.
openaire +1 more source
No soup for starters? Autotrophy and the origins of metabolism
Trends in Biochemical Sciences, 1995In recent years, several alternatives to the classical prebiotic-soup model for the origin of life have been proposed. Among these, the theory of Wächtershäuser proposes that an archaic version of the autotrophic reductive citric acid cycle, driven by pyrite formation and contained on the resulting pyrite surface, was the earliest metabolic cycle, from
openaire +2 more sources
D-ribulose-1,5-diphosphate carboxylase and the evolution of autotrophy
BioSystems, 1974F Robert Tabita +2 more
exaly +3 more sources
Microbial Autotrophy: A Primary Source of Organic Carbon in Marine Sediments
Science, 1979The chemoautotrophic fixation of carbon dioxide by bacteria is responsible for an appreciable component of the organic carbon in a sulfide-rich marine mud. A peak of carbon dioxide fixation (at 40 centimeters subbottom) coincides with peaks in the organic carbon content, the ratio of carbon to nitrogen, and bacterial cell counts.
P E, Kepkay, R C, Cooke, J A, Novitsky
openaire +2 more sources
Enzymes and genes of microbial autotrophy.
Microbiological sciences, 1990Ribulose 1,5-bisphosphate carboxylase/oxygenase and phosphoribulokinase are enzymes which are unique to, and essential for, the operation of the Calvin cycle. Biochemical and genetic studies of these enzymes in autotrophic bacteria are providing information on the evolution of autotrophy, regulation of CO2 assimilation and on the prospects of ...
G A, Codd, D, Vakeria
openaire +1 more source
Comparative biochemistry of CO2 fixation and the evolution of autotrophy.
International microbiology : the official journal of the Spanish Society for Microbiology, 2000Carbon dioxide fixation is a polyphyletic trait that has evolved in widely separated prokaryotic branches. The three principal CO2-assimilation pathways are (i) the reductive pentose-phosphate cycle, i.e. the Calvin-Benson cycle; (ii) the reductive citric acid (or Arnon) cycle; and (iii) the net synthesis of acetyl-CoA from CO/CO2, or Wood pathway ...
Peretó, Juli +3 more
openaire +2 more sources
Die obligate Autotrophie der Nitrifikationsbakterien
Archiv f�r Mikrobiologie, 19491. Langfristige Einwirkung organischer Stoffe wie Boillon, Hefewasser, Nahrstoff-Heyden, Glykose usw. auf Nitrifikationsbakterien in ausnitrifizierter Nahrlosung fuhrte zu einer Zellschadigung. 2. Eine Zellvermehrung auf organischer Substanz wurde in keinem Fall beobachtet, ebensowenig gelang eine Umzuchtung autotropher Formen in ...
openaire +1 more source
Obligate autotrophy at the thermodynamic limit of life in a new acetogenic bacterium
Frontiers in Microbiology, 2023Ilya Kublanov, Alexander Elcheninov
exaly