Regulation of ligninolytic activity by nutrient nitrogen in white-rot basidiomycetes

Leatham, Gary F.

doi:10.1016/0378-1097(83)90305-1

Cited by 41 publications

(56 citation statements)

References 8 publications

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“…This is supported by previously published relevant results indicating stimulation of ligninolytic activity of L. edodes (Leatham and Kirk 1983) as well as cellulolytic activity and biomass production (Silva et al 2005b) by increased nitrogen in the substrate. This positive correlation of laccase and endoglucanase activities indicates that a high biological potential of the strain along with high metabolic activity in the first days of substrate colonization are prerequisites to achieve vigorous mycelium growth and high biomass yield.…”

Section: Discussionsupporting

confidence: 85%

Biomass, laccase and endoglucanase production by Lentinula edodes during solid state fermentation of reed grass, bean stalks and wheat straw residues

Philippoussis

Diamantopoulou

Παπαδοπούλου

et al. 2010

World J Microbiol Biotechnol

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Mycelium growth rates, biomass concentration (estimated as glucosamine content) and laccase and endoglucanase secretion were monitored during solid state fermentation (SSF) of wheat straw (WS), reed grass (RG) and bean stalk (BS) residues by Lentinula edodes strains 119, 121, and 122. In a first experiment, these strains were subjected to screening regarding their growth rates and biomass yield, where strain 121 proved to be the fastest colonizer. However, the greater biomass yield at the end of colonization was demonstrated by strain 122 on BS (465.93 mg g -1 d.w.). In a second experiment, growth characters, as well as endoglucanase and laccase production patterns of the selected strains 121 and 122 were monitored at three intervals i.e., at 33, 66, and 100% of substrate colonization. BS furnished the highest endoglucanase production for strain 121, while RG for strain 122. A strain and substrate-dependent behaviour of the enzyme secretion was detected, with strain 122 presenting maximal endoglucanase activity in all substrates at the initial (33%) and final (100%) stages of colonization (0.64-0.90 and 0.79-0.97 U g -1, respectively). However, in strain 121 the peak of endoglucanase production was detected in the early stages of colonization (at 33% on WS and at 66% on RG and BS). Laccase activity showed increased values (maxima on WS, 353.68 and 548.67 U g -1 by strains 121 and 122, respectively) at 66% of colonization. Correlation analysis of growth data demonstrated negative relations between growth rate and biomass yield and between laccase and endoglucanase activities on WS and RG substrates fermented by strain 122. Finally, possible relations of growth parameters with nutritional constituents of the substrates were investigated.

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Section: Discussionsupporting

confidence: 85%

Biomass, laccase and endoglucanase production by Lentinula edodes during solid state fermentation of reed grass, bean stalks and wheat straw residues

Philippoussis

Diamantopoulou

Παπαδοπούλου

et al. 2010

World J Microbiol Biotechnol

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“…Activity of MnP and Lac were detected in all cultures of T. versicolor and P. ostreatus which is in accordance with previous studies with these two fungi (Leatham and Kirk 1983;Waldner et al 1988). No LiP activity was detected in any of the fungal cultures tested, although P. chrysosporium is well-known for its ability to produce this extracellular enzyme (Tien and Kirk 1988).…”

Section: Discussionsupporting

confidence: 91%

Potential for bioremediation of agro-industrial effluents with high loads of pesticides by selected fungi

et al. 2010

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Wastewaters from the fruit packaging industry contain a high pesticide load and require treatment before their environmental discharge. We provide first evidence for the potential bioremediation of these wastewaters. Three white rot fungi (WRF) (Phanerochaete chrysosporium, Trametes versicolor, Pleurotus ostreatus) and an Aspergillus niger strain were tested in straw extract medium (StEM) and soil extract medium (SEM) for degrading the pesticides thiabendazole (TBZ), imazalil (IMZ), thiophanate methyl (TM), ortho-phenylphenol (OPP), diphenylamine (DPA) and chlorpyrifos (CHL). Peroxidase (LiP, MnP) and laccase (Lac) activity was also determined to investigate their involvement in pesticide degradation. T. versicolor and P. ostreatus were the most efficient degraders and degraded all pesticides (10 mg l⁻¹) except TBZ, with maximum efficiency in StEM. The phenolic pesticides OPP and DPA were rapidly degraded by these two fungi with a concurrent increase in MnP and Lac activity. In contrast, these enzymes were not associated with the degradation of CHL, IMZ and TM implying the involvement of other enzymes. T. versicolor degraded spillage-level pesticide concentrations (50 mg l⁻¹) either fully (DPA, OPP) or partially (TBZ, IMZ). The fungus was also able to rapidly degrade a mixture of TM/DPA (50 mg l⁻¹), whereas it failed to degrade IMZ and TBZ when supplied in a mixture with OPP. Overall, T. versicolor and P. ostreatus showed great potential for the bioremediation of wastewaters from the fruit packaging industry. However, degradation of TBZ should be also achieved before further scaling up.

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“…Three other explanations may be possible for AUR accumulation in beech CWD at decay class 5. The first explanation is the reduction in AUR decomposition due to high N concentration (Kirk and Fenn 1982;Leatham and Kirk 1983;Eriksson et al 1990;Osono et al 2006aOsono et al , 2006b. A second explanation is the formation of acidinsoluble lignin-like substances such as protein-lignin complexes by immobilized N in decay class 5 (Berg 1988;Berg and McClaugherty 1989;Osono et al 2006a).…”

Section: Relationship Between Decomposition and Fungal Successionmentioning

confidence: 95%

Dynamics of physicochemical properties and occurrence of fungal fruit bodies during decomposition of coarse woody debris ofFagus crenata

Fukasawa

Osono

Takeda

2009

Journal of Forest Research

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The pattern of changes in the physicochemical properties of wood, and its relationship with fungal succession during decomposition of coarse woody debris (CWD) of beech (Fagus crenata Blume) were investigated. In total, 47 snags and 66 logs were assigned to a system of five decay classes, and were used for analysis of the decomposition process. The decomposition process consists of two phases characterized by their dominant organic chemical constituents. In the first phase (decay class 1-3), acid-unhydrolyzable residue (AUR) and holocellulose decreased simultaneously. In the second phase (decay class 3-5), holocellulose decayed selectively. Fruiting bodies of ten fungal taxa occurred frequently on decomposing logs and/or snags. These fungi were divided into early and late colonizers according to their occurrence during CWD decomposition. The relationship between fungal community composition and the physicochemical properties of CWD was analyzed by canonical correspondence analysis (CCA). According to the Monte Carlo permutation test, decay class, water content, and type of CWD (log or snag) significantly affected the fungal community structure. Our results suggested that white-rot basidiomycetes, especially Omphalotus guepiniformis, play a central role in the simultaneous decomposition of AUR and holocellulose in the first phase of decomposition. On the other hand, fungal taxa occurring in the second phase of decomposition may not be responsible for the decomposition of holocellulose. Three possible mechanisms of holocellulose decomposition and AUR accumulation in the second phase of decomposition are proposed and discussed.

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Regulation of ligninolytic activity by nutrient nitrogen in white-rot basidiomycetes

Cited by 41 publications

References 8 publications

Biomass, laccase and endoglucanase production by Lentinula edodes during solid state fermentation of reed grass, bean stalks and wheat straw residues

Biomass, laccase and endoglucanase production by Lentinula edodes during solid state fermentation of reed grass, bean stalks and wheat straw residues

Potential for bioremediation of agro-industrial effluents with high loads of pesticides by selected fungi

Dynamics of physicochemical properties and occurrence of fungal fruit bodies during decomposition of coarse woody debris ofFagus crenata

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