The influence of pH on pigment formation by lignicolous fungi

Tudor, Daniela; Robinson, Seri C.; Cooper, Paul A.

doi:10.1016/j.ibiod.2012.09.013

Cited by 58 publications

(36 citation statements)

References 35 publications

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“…Resource modification may explain differences in community development following different pre-colonizers (Woodward and Boddy, 2008;Allison, 2012): T. versicolor decays beech wood faster than V. comedens (Hiscox et al, 2015a), but V. comedens decreases the pH of colonized wood more than T. versicolor (Hiscox et al, 2015). Fungi alter their resource pH, with different species (and hence assemblages) generating different pH (Tudor et al, 2013). The initial pH of wood disks was suspected partly to explain differences in successor communities in beech disks in a previous experiment (Hiscox et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Location, location, location: priority effects in wood decay communities may vary between sites

Hiscox

Savoury

Johnston

et al. 2016

Environmental Microbiology

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SummaryPriority effects are known to have a major influence on fungal community development in decomposing wood, but it has not yet been established whether these effects are consistent between different geographical locations. Here, beech (Fagus sylvatica) wood disks that had been pre-colonized with three wood decay basidiomycetes were placed in seven woodland sites with similar characteristics for 12-24 months, and the successor communities profiled using culture-based techniques coupled with amplicon sequencing. On the majority of sites, assembly history differed as a result of primary versus secondary resource capture only (i.e. different communities developed in uncolonized control disks compared with those that had been pre-colonized), but on certain sites distinct successor communities followed each pre-colonizer species. This study provides preliminary evidence that differences in abiotic factors and species pools between sites can cause spatial variation in how priority effects influence wood decay communities.

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Section: Discussionmentioning

confidence: 99%

Location, location, location: priority effects in wood decay communities may vary between sites

Hiscox

Savoury

Johnston

et al. 2016

Environmental Microbiology

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“…Studies on wood-inhabiting fungi indicate that pH of the substrate potentially plays an important role in fungal melanin formation. Fungi Trametes versicolor and Xylaria polymorpha tested on wood substrates produced maximum pigmentation at the pH range 4.5-5.0, except for Scytalidium cuboideum, which produce maximum intensity of red pigment at pH 6 and blue pigment at pH 8 [53]. In our study with the hypermelanized mutant (MEL1) from A. nidulans, we observed an increase in the production of pigment when the initial pH of the culture was at 6.8 compared to pH 8.0 [50].…”

Section: Factors Influencing the Melanin Productionmentioning

confidence: 96%

Production of Melanin Pigment by Fungi and Its Biotechnological Applications

Sponchiado¹,

Sousa²,

Andrade³

et al. 2017

Melanin

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Production of the microbial pigments is one of the emerging fields of research due to a growing interest of the industry for safer products, easily degradable and eco-friendly. Fungi constitute a valuable source of pigments because they are capable of producing high yields of the substance in the cheap culture medium, making the bioprocess economically viable on the industrial scale. Some fungal species produce a dark-brown pigment, known as melanin, by oxidative polymerization of phenolic compounds, such as glutaminyl-3,4-dihydroxybenzene (GDHB) or catechol or 1,8-dihydroxynaphthalene (DHN) or 3,4-dihydroxyphenylalanine (DOPA). This pigment has been reported to act as "fungal armor" due to its ability to protect fungi from adverse conditions, neutralizing oxidants generated in response to stress. Apart from the scavenging activity, melanin exhibits other biological activities, including thermoregulatory, radio-and photoprotective, antimicrobial, antiviral, cytotoxic, anti-inflammatory, and immunomodulatory. Studies have shown that the media composition and cultivation conditions affect the pigment production in fungi and the manipulation of these parameters can result in an increase in pigment yield for large-scale pigment production. This chapter presents a comprehensive discussion of the research on fungal melanin, including the recently discovered biological activities and the potential use of this pigment for various biotechnological applications in the fields of biomedicine, dermocosmetics, materials science, and nanotechnology.

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“…Acid Black with a surface active agent (3 g/L), acetic acid (3 g/L), and sodium acetate (1 g/L). The pH value was controlled at 5 to 6 (Tudor et al 2013).…”

Section: Treatment and Composite Preparationmentioning

confidence: 99%

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

Hu¹,

Yu²

2014

BioResources

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The objective of this study was to investigate the influence of acid dye on color change, modulus of rupture, modulus of elasticity, shear strength (parallel loading), thickness swelling rate, and water absorption rate of bamboo-based fiber composites from Phyllostachys pubescens. Bamboo fiber veneers were treated with acid black via three procedures: dyed in water at 20 °C, dyed in water at 90 °C, and dyed in ethanol at 75 °C. The samples dyed in ethanol at 75 °C and those dyed in water at 90 °C had a higher exhaustion rate than those dyed in water at 20 °C. The color change of bamboo fiber veneers exhibited similar variation trends by the three methods. The dyeing procedure slightly reduced the modulus of rupture and modulus of elasticity of bamboo-based fiber composites. Compared with the samples dyed in water, the samples dyed in ethanol had reduced shear strength (parallel loading) and modulus of elasticity. The thickness swelling rate and water absorption rate of bamboo-based fiber composite samples were reduced by the dye treatment.

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The influence of pH on pigment formation by lignicolous fungi

Cited by 58 publications

References 35 publications

Location, location, location: priority effects in wood decay communities may vary between sites

Location, location, location: priority effects in wood decay communities may vary between sites

Production of Melanin Pigment by Fungi and Its Biotechnological Applications

Effects of Acid Dye on the Performance of Bamboo-based Fiber Composites

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