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Ecophysiology and respiratory metabolism during the germination of Inga sessilis (Vell.) Mart. (Mimosaceae) seeds subjected to hypoxia and anoxia Rev. Bras. Bot.
OKAMOTO,JANETE MAYUMI; JOLY,CARLOS ALFREDO.
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 germinate under hypoxia; yet, anoxia periods over 96 h are lethal to the seeds. Ethanol is the main product of the seeds anaerobic metabolism, but the steep increase in lactate after 24 h anoxia or 48 h hypoxia may explain the drop in seed viability.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inga sessilis; Germination; Respiratory metabolism; Hypoxia; Anoxia.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000100006
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Influence de la température sur la consommation d'oxygène du bar juvénile, Dicentrarchus labrax L. ArchiMer
Bical, C.; Lasserre, P..
This study quantifies the influence of temperature on the respiratory activity of juvenile Dicentrarchus labrax L. The fry were less than one year old and were obtained from the breeding tanks at the C.O.B. (Centre Océanologique de Bretagne). Diminution in the oxygen concentration, during time, within sealed ves­sels was measured with a Clark oxygen electrode (Orbisphere Material modified). Initially the respiratory rate was determined, for acclimatized fishes, as a function of the decrease in the oxygen concentration of the milieu at diffe­rent temperatures (8°, 10°, 15°, 20° and 25°C) and constant salinity 30 %o . The relationship between metabolism and weight, at these temperatures was then established for two different levels of activity "routine" and...
Tipo: Text Palavras-chave: Respiration; Adaptations métaboliques; Méthode confinement; Température; Bar Dicentrarchus Zabrax L.; Respiratory metabolism; Sealed vessel; Temperature; Sea bass Dicentrarchus Zabrax L..
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41685/40894.pdf
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