Occurrence of laccases in lichenized ascomycetes of the Peltigerineae

Laufer, Zsanett; Beckett, Richard P.; Minibayeva, Farida; Lüthje, Sabine; Böttger, Michael

doi:10.1016/j.mycres.2006.03.011

Cited by 30 publications

(12 citation statements)

References 43 publications

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“…Indeed, lichen, mosses and various microorganisms are known to contain a range of phenolic compounds (Reddy, 1984;Lawrey, 1995), including pigments related to ultraviolet protection (Quesada et al, 1999;Rozema et al, 2001), potentially serving as substrates for fungal laccases (Thurston, 1994;Mayer and Staples, 2002). It was also recently reported that some lichenized ascomycetes showed extracellular laccase activity (Laufer et al, 2006), which could partly explain the results presented here.…”

Section: C-degradationsupporting

confidence: 58%

Functional microarray analysis of nitrogen and carbon cycling genes across an Antarctic latitudinal transect

et al. 2007

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Soil-borne microbial communities were examined via a functional gene microarray approach across a southern polar latitudinal gradient to gain insight into the environmental factors steering soil Nand C-cycling in terrestrial Antarctic ecosystems. The abundance and diversity of functional gene families were studied for soil-borne microbial communities inhabiting a range of environments from 511S (cool temperate -Falkland Islands) to 721S (cold rock desert -Coal Nunatak). The recently designed functional gene array used contains 24 243 oligonucleotide probes and covers 410 000 genes in 4150 functional groups involved in nitrogen, carbon, sulfur and phosphorus cycling, metal reduction and resistance and organic contaminant degradation (He et al. 2007). The detected N-and C-cycle genes were significantly different across different sampling locations and vegetation types. A number of significant trends were observed regarding the distribution of key gene families across the environments examined. For example, the relative detection of cellulose degradation genes was correlated with temperature, and microbial C-fixation genes were more present in plots principally lacking vegetation. With respect to the N-cycle, denitrification genes were linked to higher soil temperatures, and N 2 -fixation genes were linked to plots mainly vegetated by lichens. These microarray-based results were confirmed for a number of gene families using specific real-time PCR, enzymatic assays and process rate measurements. The results presented demonstrate the utility of an integrated functional gene microarray approach in detecting shifts in functional community properties in environmental samples and provide insight into the forces driving important processes of terrestrial Antarctic nutrient cycling.

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Section: C-degradationsupporting

confidence: 58%

Functional microarray analysis of nitrogen and carbon cycling genes across an Antarctic latitudinal transect

et al. 2007

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“…Secondary metabolites, which in the case of saxicolous lichens determine biodeterioration through ion leaching from minerals (Chen et al 2000), are involved in the relationship of muscicolous, corticolous and terricolous lichens with plants, as both growth substrates and neighbors on soil, causing alleopathic interferences (Legaz et al 2004;Lawrey 2009). Enzymatic processes are involved in hyphal adhesion on and penetration within plant tissues (de los Rı´os et al 1997;Laufer et al 2006) as well as they have been recently suggested to explain carbonate dissolution by endolithic lichens (Tretiach et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The secretion of laccases by the foliose Pseudocyphellaria aurata has been suggested to assist the attachment of lichens to their lignin-rich substrate (Laufer et al 2006). The production of b-1,4-glucanase and a polygalacturonase by Evernia prunastri supports the enzymatic decomposition of cellulose and of the pectin (rhamnogalacturonide fraction) of the primary cell walls of oak tissues (Yagu¨e et al 1984).…”

Section: To What Extent Do Corticolous Lichens Affect Plant Health?mentioning

confidence: 99%

Lichen-plant interactions

Favero‐Longo

Piervittori

2010

Journal of Plant Interactions

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Controversial data on the pathways and effects of lichen growth on and near bryophytes and vascular plants are reviewed. In most cases, plants which are used as growth substrates positively influence lichen mineral nutrition and are poorly affected by lichen overgrowth, but several reports of negative relationships, including lichen parasitism and allelopathic interferences, prevent generalizations. The allelopathy of terricolous lichens against neighboring plants has been suggested by in vitro investigations, and a multidirectional phytotoxic mode of action has been shown for lichen secondary metabolites. Recent researches on field settings, instead, offer little support of lichen allelopathy, and plant allelopathy against lichens has so far been neglected. A comparison with lichen-rock interactions indicates that a common set of physical and chemical factors can explain the heterogeneous reciprocal effects that exist between lichens and plants, which depend on the species involved, and highlights gaps that need further studies.

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“…L-DOPA (3,4-dihydroxy phenyl-L-alanine) is an amino acid analogue, can be isolated from higher plants and some microbial sources (Laufer et al 2006). It is a very useful drug in the treatment of Parkinson ' s disease since 1967.…”

Section: Introductionmentioning

confidence: 99%

Production of 3,4-dihydroxy phenyl-l-alanine (l-DOPA) by Egyptian halophilic black yeast

Mahmoud

El-Bendary²

2010

World J Microbiol Biotechnol

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Production of 3,4-dihydroxy phenyl-L-alanine (L-DOPA) using an Egyptian isolate of halophilic black yeast was studied. Optimum aeration level and incubation period for high yield production of L-DOPA were 50 ml medium/250 ml flask with 200 rpm and 36 h, respectively. Two new techniques (addition of aniline or NaCl to the medium) have been investigated to enhance the monophenolase activity and inhibit or reduce diphenolase activity of tyrosinase to form high yield of L-DOPA without more oxidation to melanin. Addition of aniline to tyrosine medium at 3 ll/ml medium enhanced L-DOPA production 2.9 fold, however, addition of NaCl at 20% showed the same amount of L-DOPA as the control. Peptone and ram horn hydrolysate were studied as nitrogen sources instead of tyrosine in the medium and they showed good nitrogen sources for L-DOPA production as tyrosine. Finally, addition of aniline (3 ll/ml) to ram horn hydrolysate was economically feasible and cost effective for L-DOPA production by Egyptian halophilic black yeast.

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Occurrence of laccases in lichenized ascomycetes of the Peltigerineae

Cited by 30 publications

References 43 publications

Functional microarray analysis of nitrogen and carbon cycling genes across an Antarctic latitudinal transect

Functional microarray analysis of nitrogen and carbon cycling genes across an Antarctic latitudinal transect

Lichen-plant interactions

Production of 3,4-dihydroxy phenyl-l-alanine (l-DOPA) by Egyptian halophilic black yeast

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