1
|
Leštan D, Perdih A. Influence ofPhanerochœte chrysosporium culture conditions on mitochondrial cytochrome content. Folia Microbiol (Praha) 1997. [DOI: 10.1007/bf02826556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2
|
Tomaževič E, Perdih A. Determination of intrapellet ligninolytic activity. Folia Microbiol (Praha) 1996. [DOI: 10.1007/bf02814666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
3
|
Lestan D, Lestan M, Perdih A. Physiological Aspects of Biosynthesis of Lignin Peroxidases by
Phanerochaete chrysosporium. Appl Environ Microbiol 1994; 60:606-12. [PMID: 16349189 PMCID: PMC201356 DOI: 10.1128/aem.60.2.606-612.1994] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Methods based on UV-visible diffuse reflectance spectroscopy were used to study the physiological aspects of lignin-peroxidase biosynthesis by
Phanerochaete chrysosporium.
Here we introduce the use of cytochrome
aa
3
as an indicator of active fungal biomass and of its redox state to calculate the oxygen mass transport coefficient between the growth medium and the fungal cell interior. When lignin peroxidase biosynthesis was enhanced by the addition of Tween 80 or Tween 20 to the growth medium, a higher proportion of reduced cytochrome
aa
3
and a higher oxygen diffusion barrier were observed compared with control cultures. In cultures supplemented with Tween 80 or Tween 20, a higher oxygen mass transport coefficient between the growth medium and the interior of the fungal cell was also found. The beginning of the lignin peroxidase activity in these cultures was found to coincide with a temporary cessation in the dry biomass increase and a reduction in the relative active-biomass concentration. During the lignin peroxidase activity, a decrease in the intracellular pH and an increase in the growth medium pH were determined in cultures supplemented with Tween 80.
Collapse
Affiliation(s)
- D Lestan
- Department of Chemistry and Chemical Technology, University of Ljubljana, SLO-61001, Ljubljana, Slovenia
| | | | | |
Collapse
|
4
|
Lestan D, Podgornik H, Perdih A. Analysis of Fungal Pellets by UV-Visible Spectrum Diffuse Reflectance Spectroscopy. Appl Environ Microbiol 1993; 59:4253-60. [PMID: 16349122 PMCID: PMC195893 DOI: 10.1128/aem.59.12.4253-4260.1993] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The application of the UV-visible spectrum diffuse reflectance spectroscopy for the determination of intracellular pH in vivo, for determination of cytochrome content, and for the noninvasive in vivo detection of the redox state of fungal mitochondrial cytochromes in filamentous fungi is introduced. The time course of the intracellular pH values, mitochondrial cytochromes, and CO-binding pigments content and the correlations between the actual redox state of cytochrome
aa
3
and saturation of growth medium with oxygen in pellets of the basidiomycete
Phanerochaete chrysosporium
were determined. As the test microorganism, the yeast
Saccharomyces cerevisiae
was used. UV-visible spectrum diffuse reflectance spectroscopy proved to be a promising method for the quick and simple analysis of light-impermeable biological structures for which the classical transmittance spectrophotometric methods are difficult to implement.
Collapse
Affiliation(s)
- D Lestan
- Department of Chemistry and Chemical Technology, University of Ljubljana, P.O. Box 537, SLO-61001 Ljubljana, Slovenia
| | | | | |
Collapse
|
5
|
Mitochondrial cytochromes and CO-binding pigments ofPhanerochaete chrysosporium. Folia Microbiol (Praha) 1993. [DOI: 10.1007/bf02898760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|