Enhanced extracellular laccase activity as a part of the response system of white rot fungi: Trametes versicolor and Abortiporus biennis to paraquat-caused oxidative stress conditions

Jaszek, Magdalena; Grzywnowicz, Krzysztof; Malarczyk, Elżbieta; Leonowicz, Andrzej

doi:10.1016/j.pestbp.2006.01.002

Cited by 70 publications

(57 citation statements)

References 42 publications

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“…These findings demonstrated that the microbial growth stage had an enormous influence on the laccase yield in filamentous fungi and the application of an inducer at an appropriate growth stage enhances higher yield [18,37]. Results obtained in this experiment are similar to those obtained by De Souza et al [19].…”

Section: Effect Of Chitosan Induction Time On Laccase Production Fromsupporting

confidence: 89%

“…4 Effect of chitosan multiple addition on a intracellular and extracellular laccase activity b extracellular protein concentration and biomass growth rate in the media culture of T. versicolor using the optimized conditions bacteria and fungi [2,4,38]. Increase in the extracellular concentration of ROS and corresponding increase in laccase production in T. versicolor culture have been reported [17,37]. Higher physiological concentration of ROS in the chitosan-treated cultures is an implication of excessive oxidative stress [36].…”

Section: Effect Of Chitosan Induction Time On Laccase Production Frommentioning

confidence: 99%

“…Either way, chitosan addition increased the level of the laccase gene transcript and subsequently enhanced the higher titer value of laccase produced by T. versicolor. There is evidence of increased laccase production and a parallel increase in the level of lcc mRNA in Trametes spp and Pleurotus pulmonarius as a result of exposure to inducers and conditions [17][18][19][20]37]. Several studies have shown that fungal laccases have several isoforms which are encoded by several genes and these genes are subject to different patterns of regulations under different conditions [19,45,46].…”

Section: Effect Of Chitosan Induction Time On Laccase Production Frommentioning

confidence: 99%

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Chitosan multiple addition enhances laccase production from Trametes versicolor

Adekunle

Wang

et al. 2015

Bioprocess Biosyst Eng

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Chitosan multiple addition strategy was developed to improve laccase production from Trametes versicolor cultures. The optimized multiple addition strategy was carried out by two-time addition of 0.1 g L -1 chitosan to a 2-day-old culture media, with 24-h interval between the treatments. Under these conditions, laccase activity of 644.9 U l -1 was achieved on the seventh day and laccase production was improved by 93.5 % higher than the control. Chitosan treatment increased reactive oxygen species generation and extracellular protein concentration in the treated mycelia. In contrast, the inducer inhibited the mycelia growth. The result of the quantitative reverse transcription polymerase chain reaction showed that the copy number of the laccase gene transcript increased by 16.7-fold in the treated mycelia relative to the control. This study provides insight into some of the intrinsic metabolic processes involved in the upregulation of laccase production in the presence of chitosan inducer in fungal culture.

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Section: Effect Of Chitosan Induction Time On Laccase Production Fromsupporting

confidence: 89%

Section: Effect Of Chitosan Induction Time On Laccase Production Frommentioning

confidence: 99%

Section: Effect Of Chitosan Induction Time On Laccase Production Frommentioning

confidence: 99%

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Chitosan multiple addition enhances laccase production from Trametes versicolor

Adekunle

Wang

et al. 2015

Bioprocess Biosyst Eng

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“…It has been suggested that laccases may be important aromatic compound detoxification enzymes for many fungal species by catalyzing nonspecific oxidation and polymerization reactions. For example, laccase production was stimulated by the addition of 0.5 mM PCP to liquid cultures of Trametes versicolor (Mougin et al, 2002) and by the addition of 25 µM paraquat to T. versicolor and 20 µM paraquat to A. biennis cultures (Jaszek et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Pentachlorophenol removal by Pleurotus pulmonarius in submerged cultures

Souza

Costa

Madrona

et al. 2011

Braz. arch. biol. technol.

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Pentachlorophenol (PCP) removal by Pleurotus pulmonarius grown in submerged cultures in the presence and absence of laccase inducers was studied in this work. When PCP was added to a final concentration of 25 mg·L -1 in submerged cultures actively producing laccase, 70% of the PCP was removed after 96 h. The removal of PCP was less than 20% in the cultures with low laccase activity. The results suggested that laccase played an important role in the biodegradation of PCP by P. pulmonarius and that for bioremediation purposes the fungus must be cultured under the conditions of active laccase production.

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“…Conversely, oxidative stress may contribute to increased enzyme production under certain circumstances, for example, enhanced extracellular laccase activity is found as a part of the response system of white rot fungi, Trametes versicolor and Abortiporus biennis, to paraquatcaused oxidative stress conditions (Jaszek et al 2006).…”

Section: The Effects Of Oxidative Stress On Enzyme Production In Fungimentioning

confidence: 99%

Oxidative stress in fungal fermentation processes: the roles of alternative respiration

Bai

O’Donnell³

et al. 2010

Biotechnol Lett

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Filamentous fungi are arguably the most industrially important group of microorganisms.Production processes involving these simple eukaryotes are often highly aerobic in nature, which implies these cultures are routinely subject to oxidative stress. Despite this, little is known about how filamentous fungi cope with high levels of oxidative stress as experienced in fermenter systems. More surprisingly, much of our knowledge of oxidative stress responses in fungi comes from environmental or medical studies. Here, the current understanding of oxidative stress effects and cellular responses in filamentous fungi is critically discussed. In particular the role of alternative respiration is evaluated, and the contributions of the alternative oxidase and alternative dehydrogenases in defence against oxidative stress, and their profound influence on fungal metabolism is critically examined. Finally, the importance of further research which would underpin a less empirical approach to optimising fungal strains for the fermenter environment is emphasised.

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Enhanced extracellular laccase activity as a part of the response system of white rot fungi: Trametes versicolor and Abortiporus biennis to paraquat-caused oxidative stress conditions

Cited by 70 publications

References 42 publications

Chitosan multiple addition enhances laccase production from Trametes versicolor

Chitosan multiple addition enhances laccase production from Trametes versicolor

Pentachlorophenol removal by Pleurotus pulmonarius in submerged cultures

Oxidative stress in fungal fermentation processes: the roles of alternative respiration

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