Effect of osmotic stress on Aspergillus chevalieri respiratory system
Jazyk angličtina Země Spojené státy americké Médium print
Typ dokumentu časopisecké články
PubMed
11899473
DOI
10.1007/bf02814430
Knihovny.cz E-zdroje
- MeSH
- Aspergillus metabolismus fyziologie ultrastruktura MeSH
- elektroforéza v agarovém gelu MeSH
- elektronová mikroskopie MeSH
- fungální proteiny analýza metabolismus MeSH
- fungální RNA analýza MeSH
- kultivační média MeSH
- lipidy analýza MeSH
- metabolismus lipidů MeSH
- mitochondriální proteiny analýza metabolismus MeSH
- multienzymové komplexy analýza metabolismus MeSH
- NADH, NADPH oxidoreduktasy analýza metabolismus MeSH
- osmotický tlak MeSH
- oxidoreduktasy analýza metabolismus MeSH
- respirační komplex IV analýza metabolismus MeSH
- sacharosa MeSH
- sukcinátdehydrogenasa analýza metabolismus MeSH
- zduření mitochondrií MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- fungální proteiny MeSH
- fungální RNA MeSH
- kultivační média MeSH
- lipidy MeSH
- mitochondriální proteiny MeSH
- multienzymové komplexy MeSH
- NADH oxidase MeSH Prohlížeč
- NADH, NADPH oxidoreduktasy MeSH
- oxidoreduktasy MeSH
- respirační komplex IV MeSH
- sacharosa MeSH
- succinate oxidase MeSH Prohlížeč
- sukcinátdehydrogenasa MeSH
The osmotolerant fungus Aspergillus chevalieri tolerates up to 80% sucrose concentration in the growth medium. At 50% sucrose the growth rate is 1.5-fold higher than in control (3% sucrose), at 80% sucrose it drops to 30% of the control level. Total proteins and lipids in the mitochondrial fractions obtained from the mycelium rise with increasing sucrose concentration during growth (2.6 and 2.1 times at 80% sucrose). The rate of respiration by whole cells and mitochondrial fractions increases with increased sucrose level in the growth medium. The activity of respiratory enzymes, such as succinate dehydrogenase, cytochrome oxidase, NADH oxidase and succinate oxidase, were also higher in cells grown in the presence of elevated sucrose concentrations. The largest increase was observed with NADH dehydrogenase. A. chevalieri cells grown at high osmotic stress exhibited enlarged mitochondria. The mean mitochondrial diameter at 50 and 80% sucrose was approximately 2.9- and 2.6-fold larger than in the control, respectively. Agarose gel electrophoresis of nucleic acids revealed the presence of high-density bands of RNA in mitochondrial fractions from cells grown at elevated sucrose levels.
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J Bacteriol. 1984 Jan;157(1):59-63 PubMed
Plant Physiol. 1967 Mar;42(3):407-14 PubMed
Folia Microbiol (Praha). 1999;44(4):411-8 PubMed
Science. 1982 Sep 24;217(4566):1214-22 PubMed
Bacteriol Rev. 1976 Dec;40(4):803-46 PubMed
Crit Rev Microbiol. 1987;14(4):311-56 PubMed
Adv Microb Physiol. 1978;17:181-242 PubMed