caa a22 4500 465762166 CHVBK 20180323111902.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF00879762 doi (NATIONALLICENCE)springer-10.1007/BF00879762 The effect of light on the release of organic compounds by the cyanobacterium Oscillatoria rubescens [Elektronische Daten] [M. Feuillade, J. Feuillade, V. Fiala] The effect of light intensity on the release of dissolved organic carbon during photosynthesis on NaH14CO3 was investigated using the phytoplanktonic CyanobacteriumOscillatoria rubescens. The released products were fractionated by molecular size and chemical identifications attempted using combined thin-layer electrophoresis and chromatography, and high pressure liquid chromatography. Within the range of irradiances tested (from 6 to 60 µmole m−2 sec−1), though the upper one inhibited photosynthesis ofO. rubescens, light had little effect on the quantity and composition of the excreted products. The released carbon was always lower than 3% of the incorporated carbon, and mainly composed (62 to 86%) by small molecular weight compounds. The prevailing identified compounds were amino acids which represented more than 20% of the excreted carbon. Among organic acids, glycolic acid accounted for less than 2% of the recovered radioactivity. Glucose was the only identified sugar. Birkhäuser Verlag, 1990 Excretion nationallicence cyanobacteria nationallicence oscillatoria nationallicence EOC : excreted organic carbon nationallicence DOC : dissolved organic carbon nationallicence PER : percent extracellular release nationallicence LMW : low molecular weight nationallicence HMW : high molecular weight nationallicence AA : amino acids nationallicence µmoles : m−2 sec−1 = µEinsteins m−2 sec−1 nationallicence Feuillade M. Station d'Hydrobiologie lacustre — I.N.R.A., I.L. F 74203, Cédex — THONON-les-BAINS, France aut Feuillade J. Station d'Hydrobiologie lacustre — I.N.R.A., I.L. F 74203, Cédex — THONON-les-BAINS, France aut Fiala V. Laboratoire du Métabolisme et de la nutrition des Plantes — I.N.R.A., F 78026, Cédex — Versailles, France aut Aquatic Sciences Birkhäuser-Verlag 52/4(1990-12-01), 345-359 1015-1621 52:4<345 1990 52 27 https://doi.org/10.1007/BF00879762 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00879762 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Feuillade M. Station d'Hydrobiologie lacustre — I.N.R.A., I.L. F 74203, Cédex — THONON-les-BAINS, France aut NATIONALLICENCE 700 1- Feuillade J. Station d'Hydrobiologie lacustre — I.N.R.A., I.L. F 74203, Cédex — THONON-les-BAINS, France aut NATIONALLICENCE 700 1- Fiala V. Laboratoire du Métabolisme et de la nutrition des Plantes — I.N.R.A., F 78026, Cédex — Versailles, France aut NATIONALLICENCE 773 0- Aquatic Sciences Birkhäuser-Verlag 52/4(1990-12-01), 345-359 1015-1621 52:4<345 1990 52 27 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer