Juvenile Atlantic salmon decrease white trunk muscle IGF-1 expression and reduce muscle and plasma free sulphur amino acids when methionine availability is low while liver sulphur metabolites mostly is unaffected by treatment

2015 ◽  
Vol 22 (4) ◽  
pp. 801-812 ◽  
Author(s):  
M. Espe ◽  
E. Veiseth-Kent ◽  
J.-E. Zerrahn ◽  
I. Rønnestad ◽  
A. Aksnes
Keyword(s):  
Amino Acids ◽  
Atlantic Salmon ◽  
Trunk Muscle ◽  
Juvenile Atlantic Salmon ◽  
Free Sulphur ◽  
Sulphur Amino Acids

Metabolism of elemental sulphur (S°) during fungal spore germination

1993 ◽  
Vol 39 (8) ◽  
pp. 736-741 ◽  
Author(s):  
Trello Beffa
Keyword(s):  
Amino Acids ◽  
Neurospora Crassa ◽  
Fungal Spore ◽  
Mitochondrial Respiratory Chain ◽  
Final Concentration ◽  
Elemental Sulphur ◽  
Phomopsis Viticola ◽  
Free Sulphur ◽  
Sulphur Amino Acids ◽  
Layer Chromatography

35S-labelled elemental sulphur (S°) at nontoxic levels (3 μM) was incorporated into sulphur amino acids and glutathione by the spores of the fungus Phomopsis viticola. Incorporation studies were performed with 3 μM 35S° during the pregermination period of P. viticola spores. The free sulphur amino acids and protein sulphur amino acids were purified by column and thin-layer chromatography. During the first minutes of the pregermination process of the spores, the S° was essentially metabolized into free cysteine and glutathione. Detectable concentrations of methionine and homocysteine were measured after 1 h of incubation. Azide (2 mM final concentration), an inhibitor of the mitochondrial respiratory chain at the level of cytochrome oxidase, strongly inhibited the incorporation of S°. In contrast, the uncoupler 2,4-dinitrophenol (15 μM final concentration) and sulphate did not affect the incorporation of S°. The metabolism of 35S° into the protein sulphur amino acids cysteine and methionine during the germination of spores of P. viticola and conidia of Neurospora crassa is also discussed. It appears that S° does not necessarily have to be oxidized to sulphate prior to its incorporation into sulphur amino acids, but could be directly reduced to sulphide at the level of the respiratory chain.Key words: elemental sulphur, assimilation, sulphur amino acids, Phomopsis viticola, Neurospora crassa.

scholarly journals The spatial scale of density-dependent growth and implications for dispersal from nests in juvenile Atlantic salmon

Oecologia ◽  
2010 ◽  
Vol 165 (4) ◽  
pp. 959-969 ◽  
Author(s):  
Sigurd Einum ◽  
Grethe Robertsen ◽  
Keith H. Nislow ◽  
Simon McKelvey ◽  
John D. Armstrong
Keyword(s):  
Atlantic Salmon ◽  
Spatial Scale ◽  
Density Dependent ◽  
Juvenile Atlantic Salmon ◽  
Dependent Growth
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