Several years ago it was observed that strict anaerobiosis prevented the swelling of isolated liver mitochondria. This was true for spontaneous swelling and for swelling induced by phosphate, certain metal ions, and other substances (l-3). This observation created a sharp paradox with the generally accepted view that adenosine triphosphate or active phosphorylation was essential in maintaining ...

Avena Coleoptile, Elongation Growth, Anoxia, Auxin, NAD(P)H, Proton Pump Avena sativa coleoptile segments show an anomalous increase in elongation growth following a short period of oxygen deprivation (tested between 0 and 60 min) lasting 20-30 min (^«aerobiosis-^erobiosis transition effect = ANA effect). The increase in growth rate is 600% and is commensurate with that observable following an ...

Rice (Oryza sativa) seeds were imbibed for 3 days and the seedlings were further incubated for 8 days in the presence of either air or nitrogen. In aerobiosis, the specific activity of pyrophosphate:fructose 6-phosphate 1-phosphotransferase and that of the ATP-dependent phosphofructokinase increased about fourfold. In anaerobiosis, the specific activity of ATP-dependent phosphofructokinase rema...

The blue-green phenazine, Pyocyanin (PYO), is a well-known virulence factor produced by Pseudomonas aeruginosa, notably during cystic fibrosis lung infections. It is toxic to both eukaryotic and bacterial cells and several mechanisms, including the induction of oxidative stress, have been postulated. However, the mechanism of PYO toxicity under the physiological conditions of oxygen limitation ...