(Ecophysiology and respiratory metabolism during the germination of Inga sessilis (Vell.) Mart. (Mimosaceae) seeds subjected to hypoxia and anoxia). This paper presents a study on the respiratory metabolism of germinating seeds of Inga sessilis subjected to normoxia, hypoxia and anoxia. Although it is typical of environments where waterlogging seldom occurs, 40% of its seeds are able to germina...

Rice (Oryza sativa) and wheat (Triticum aestivum) are the most important starch crops in world agriculture. While both germinate with an anatomically similar coleoptile, this tissue defines the early anoxia tolerance of rice and the anoxia intolerance of wheat seedlings. We combined protein and metabolite profiling analysis to compare the differences in response to anoxia between the rice and w...

The aim of this study was to investigate whether treatment with the protein kinase C (PKC) agonist 1,2-dioctanoyl-sn-glycerol (1,2DOG) can protect isolated adult Wistar rat cardiomyocytes against simulated ischemia and reoxygenation. Cytosolic Ca2+ (assessed by fura 2 fluorescence), pHi (assessed by BCECF fluorescence), and cell length were measured during 80 minutes of simulated ischemia (anox...

BACKGROUND AND AIMS Anoxia-tolerant plant tissues synthesize a number of proteins during anoxia, in addition to the 'classical anaerobic proteins' involved in glycolysis and fermentation. The present study used a model system of rice coleoptile tips to elucidate patterns of protein synthesis in this anoxia-tolerant plant tissue. METHODS Coleoptile tips 7-11 mm long were excised from intact se...

The mechanism of nitrate reductase (NR) regulation under long-term anoxia in roots of whole plants and the putative role of nitrate in anoxia tolerance have been addressed. NR activity in tomato roots increased significantly after 24 h of anaerobiosis and increased further by 48 h, with a concomitant release of nitrite into the culture medium. Anoxia promoted NR activation through dissociation ...

Mechanical performance and 42K exchange were studied during anoxia in isoalted, arterially perfused, interventricular rabbit septa at 42 beats/min and 28 degree C. The septa were perfused at 1.8 ml/min per g with a modified Tyrode solution having dextrose as the metabolic substrate. Developed tension declined to 16% of preanoxic control values during 60 min of anoxia, and returned to 65% of con...

The role of water and electrolyte influxes in anoxia-induced plasma membrane disruption was investigated using rabbit proximal tubule suspension. The results indicated that normal proximal tubule (PT) cells have a great capacity for expanding cell volume in response to water influx, whereas anoxia increases the susceptibility to water influx-induced disruption, and this was attenuated by glycin...

Crucian carp (Carassius carassius L.), which are extremely anoxia-tolerant, were exposed to 17 days of anoxia at 8°C. One group of fish was transferred to normoxic water for 1̂ 8 h immediately after the anoxic period. All the eight amino acids measured in brain (including four putative neurotransmitters) were more or less strongly affected by anoxia. Gamma-aminobutyric acid (GABA) displayed a ne...

STOREY, K. B. 1988. Mechanisms of glycolytic control during facultative anaerobiosis in a marine mollusc: tissue-specific analysis of glycogen phosphorylase and fructose-2,6-bisphosphate. Can. J. Zool. 66: 1767 177 1. Changes in the activity of glycogen phosphorylase and the content of fructose-2,6-bisphosphate (F-2,6-P2) were monitored in tissues of the whelk, Busycotypus canaliculatum, over a...

Investigations of cardiorespiratory functions in pulmonary diseases have in recent years contributed much to the understanding of the development of pulmonary heart disease. Harvey et al.’ in a recent publication have stressed the importance of anoxia in patients with chronic pulmonary emphysema as a cause for the deterioration of heart function. According to them, acute anoxia may precipitate ...