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'Anaerobiosis' in keywords
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1Author    A. Krauß, A. HagerRequires cookie*
 Title    Wachstums-"burst" nach Anaerobiose: ein "stored grow th"-Effekt beim Streckungswachstum von Koleoptilen Growth Burst after Anaerobiosis: a " Stored-Growth" Effect in Avena Coleoptiles  
 Abstract    Extension growth of 1-cm segments of Avena coleoptiles (studied in liquid medium by means of a flow chamber) was anomalously increased after short anaerobic treatment. The normal growth rate in air-saturated medium without indole-3-acetic acid (IA A) was about 5/«m/min; the rate decreased under anaerobiosis to about 1 ,Mm/min, followed by an increase up to 30 itm/min when aerobic conditions were restored. This "growth burst" continued for about 10 min; then the rate decreased to the initial value of 5 /tm/min. In the same segment growth enhancement could be induced repeatedly by anaerobic treatments. The phenomenon of growth burst after anaerobiosis may be named "anaerobiosis-aerobiosis-transition effect" (ANA-effect). The ANA-effect was also observed under conditions of acid-induced growth at pH 4. Further­ more it appeared in coleoptile segments whose growth rate had already been enhanced by IA A . Anaerobic pre-treatment not only stimulated extension growth but when applied before IA A addition also overcame the lag phase of IAA-induced growth enhancement. It is supposed that a compound essential for coleoptile growth is accumulated during anaero­ biosis; such compound together with oxygen may cause the observed growth burst. Possible candi dates for this compound are discussed. 
  Reference    (Z. Naturforsch. 31c, 312 [1976]; eingegangen am 25. Februar 1976) 
  Published    1976 
  Keywords    Coleoptiles, Growth Enhancement, Auxin Effect, Anaerobiosis 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0312.pdf 
 Identifier    ZNC-1976-31c-0312 
 Volume    31 
2Author    Reiner Merz, Friedh SchneiderRequires cookie*
 Title    Growth Characteristics of in vitro Cultured Ehrlich Ascites Tumor Cells under Anaerobic Conditions and after Reaeration  
 Abstract    The effects of deprivation of oxygen on proliferation kinetics of in vitro grown Ehrlich ascites tumor cells were studied by means of flow cytometry. The flow cytometric results obtained by applying the BUdR-H 33 258 technique showed that 6 -8 hours after establishment of anaerobiosis cells lose their capacity for proliferation and accumulate in the late G1-phase; during this time late S cells enter the G2 compartment but do not divide while cells, which are in G2+M at the beginning of anaerobiosis divide and enter G l. Cell cycle distribution remained constant up to about 20 hours, thereafter Gl-cells enter the S-phase. Up to 24 hours of anaerobiosis cell number does not change and viability of the cells was not severely affected. Recultivation under aerobic conditions of 12 hours anaerobically treated cells revealed, that the cytokinetic properties of Gl cells were not impaired, while S-phase cells after reaeration did not enter G2 but began again to synthesize DNA forming cells with a DNA content greater than 4c. S-phase cells are most sensitive to deprivation of oxygen. 
  Reference    Z. Naturforsch. 37c, 326—334 (1982); received December 71981 
  Published    1982 
  Keywords    Ehrlich Ascites Tumor Cells, Anaerobiosis, Growth Characteristics 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0326.pdf 
 Identifier    ZNC-1982-37c-0326 
 Volume    37 
3Author    Reiner Merz, Friedh SchneiderRequires cookie*
 Title    Growth Characteristics of Anaerobically Treated Ehrlich Ascites Tumor Cells after Reaeration as Studied by Combination of Flow Cytometry and Centrifugal Elutriation  
 Abstract    Centrifugal elutriation was applied to separate into the cell com partm ents asynchronous Ehrlich ascites cells grown under different culture conditions. The cytokinetic properties o f the recultivated fractions were studied by flow cytometry. The present experiments prove that G l -cohorts grown 12 h under exclusion o f oxygen accum ulate in the late G 1-com partm ent. The cyto­ kinetic properties o f these cells are not changed. In contrast the cytokinetic properties o f anaerobically treated S-phase cells are changed; most o f S-cells leave the cell cycle after they have attained the DNA content o f G 2-cells and continue to synthesize D NA w ithout preceeding division. Cells with a DNA content up to the fourfold o f norm al values are found. 
  Reference    Z. Naturforsch. 37c, 833—838 (1982); received June 1 1982 
  Published    1982 
  Keywords    Ehrlich Ascites Tum or Cells, Anaerobiosis, Cytokinetic Properties 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0833.pdf 
 Identifier    ZNC-1982-37c-0833 
 Volume    37 
4Author    Z. NaturforschRequires cookie*
 Title    Increased Binding of | 14C|Ioxynil in Unicellular Green Algae under Anaerobiosis and by Addition of Other Phenolic Herbicides or Uncouplers  
 Abstract    Binding o f the phenol-type herbicide ioxynil in intact algal cells is strongly increased under anaerobic conditions. This increase is most pronounced at low concentrations o f bound ioxynil (< 3 nm ol/m g chlorophyll). The affinity o f binding sites is im proved, rather than new sites are created. Other phenol-type herbicides, as well as uncouplers like carbonylcyanidechlorophenylhydra-zone, also significantly increase ioxynil binding in algae. Binding o f D C M U -typ e herbicides, however, was not affected. These results demonstrate high variability o f ioxynil binding in algal cells and are discussed in respect o f low affinity binding. 
  Reference    Z. Naturforsch. 39c, 402 (1984); received D ecem ber 1 1983 
  Published    1984 
  Keywords    Herbicide Binding, Ioxynil Uncoupler, Anaerobiosis, A lgae 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0402.pdf 
 Identifier    ZNC-1984-39c-0402 
 Volume    39 
5Author    Rekha Chaturvedi, M. Singh, P. V. SaneRequires cookie*
 Title    Photoinactivation of Photosynthetic Electron Transport under Anaerobic and Aerobic Conditions in Isolated Thylakoids of Spinach  
 Abstract    The effect o f exposure to strong white light on photosynthetic electron transport reactions o f PS I and PS II were investigated in spinach thylakoids in the absence or presence o f oxygen. Irrespective o f the conditions used for photoinactivation, the damage to PS II was always much more than to PS I. Photoinactivation was severe under anaerobic conditions compared to that in air for the same duration. This shows that the presence o f oxygen is required for prevention o f photoinactivation o f thylakoids. The susceptibility o f water-splitting com plex in photoinactivation is indicated by our data from experiments with chloride-deficient chloro-plast membranes wherein it was observed that the whole chain electron transport from DPC to MV was much less photoinhibited than that from water. The data from the photoinactivation experiments with the Tris-treated thylakoids indicate another photodam age site at or near reaction centre o f PS II. D CM U -protected PS II and oxygen-evolving com plex from p h oto­ inactivation. D C M U protection can also be interpreted in terms o f the stability o f the PS II complex when it is in S2 state. 
  Reference    Z. Naturforsch. 47c, 63—6 (1992); received August 16 1991 
  Published    1992 
  Keywords    Photoinactivation, Anaerobiosis, Inhibitors, Photosynthetic Electron Transport, Trypsinization 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0063.pdf 
 Identifier    ZNC-1992-47c-0063 
 Volume    47 
6Author    Requires cookie*
 Title    Growth Kinetics of the G 2-Phase of Ehrlich Ascites Tumor Cells, Separated from Anaerobically Treated Asynchronous Cultures  
 Abstract    Cell cycle progression of G2 fractions (75-80% G2 (4C) cells) from 8 h anaerobically cultured asynchronous hyperdiploid Ehrlich ascites tumor cells strain Karzel, separated by centrifugal elutriation, was studied after reaeration by flow cytometric methods, including the BrdU-H33258 technique and dual parameter measurements. Analyses of the growth kinetics demonstrated that 
  Reference    Z. Naturforsch. 42c, 991 (1987); received August 20 1986/March 11 1987 
  Published    1987 
  Keywords    Growth Kinetics, Ehrlich Ascites Tumor Cells, Anaerobiosis, G2-Period, Over-Replication 
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 TEI-XML for    default:Reihe_C/42/ZNC-1987-42c-0991.pdf 
 Identifier    ZNC-1987-42c-0991 
 Volume    42