Carotenoid Pigments of the Dematiaceous Fungus<i>Wangiella Dermatitidis</i>

Geis, Philip A.; Szaniszlo, Paul J.

doi:10.1080/00275514.1984.12023836

Cited by 32 publications

(19 citation statements)

References 16 publications

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“…Visible light during mycelial growth influences: (1) primary (Dunlap & Loros, 2006) and secondary metabolism (Bayram et al, 2008;Fischer, 2008); (2) induction of heatshock proteins HSP100 in Phycomyces (Rodriguez-Romero & Corrochano, 2004, which are important in protecting the cells against several stress conditions by repairing misfolded and aggregated proteins; (3) trehalose accumulation in Neurospora crassa spores (Shinohara et al, 2002), which stabilizes proteins in their native state and preserves the integrity of membranes; and (4) pigment formation in several fungal species (Leach, 1971;Geis & Szaniszlo, 1984). All these light-affected mechanisms may be important to protect conidia against UVB radiation or to neutralize free radicals and oxidants.…”

Section: Introductionmentioning

confidence: 99%

Visible light during mycelial growth and conidiation of Metarhizium robertsii produces conidia with increased stress tolerance

Rangel

Fernandes

Braga

et al. 2011

FEMS Microbiology Letters

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Light conditions during mycelial growth are known to influence fungi in many ways. The effect of visible-light exposure during mycelial growth was investigated on conidial tolerance to UVB irradiation and wet heat of Metarhizium robertsii, an insect-pathogenic fungus. Two nutrient media and two light regimens were compared. Conidia were produced on (A) potato dextrose agar plus yeast extract medium (PDAY) (A1) under dark conditions or (A2) under continuous visible light (provided by two fluorescent lamps with intensity 5.4 W m(-2)). For comparison, the fungus was also produced on (B) minimal medium (MM) under continuous-dark incubation, which is known to produce conidia with increased tolerance to heat and UVB radiation. The UVB tolerances of conidia produced on PDAY under continuous visible light were twofold higher than conidia produced on PDAY medium under dark conditions, and this elevated UVB tolerance was similar to that of conidia produced on MM in the dark. The heat tolerance of conidia produced under continuous light was, however, similar to that of conidia produced on MM or PDAY in the dark. Conidial yield on PDAY medium was equivalent when the fungus was grown either under continuous-dark or under continuous-light conditions.

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Section: Introductionmentioning

confidence: 99%

Visible light during mycelial growth and conidiation of Metarhizium robertsii produces conidia with increased stress tolerance

Rangel

Fernandes

Braga

et al. 2011

FEMS Microbiology Letters

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“…How might the impregnation of the cell wall with pigment affect fungal pathogenicity? Studies on animal pathogens have shown that melanin can protect cells against ultraviolet radiation or provide resistance to antimicrobial oxidants (Geis and Szaniszlo, 1984;Jacobson and Tinnell, 1993); melanin or intermediates in melanin synthesis may also 1 To whom correspondence should be addressed.…”

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confidence: 99%

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

Money

Howard

1996

Fungal Genetics and Biology

123

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“…The presence of melanin and carotene in the cell wall protects the organism against environmental stress, such as dehydration and UV irradiation (Geis & Szaniszlo, 1984), but also against the oxygenic burst of mammalian phagocytes. In addition, melanin plays a role in resistance against cell wall lytic enzymes, for example chitinase and 1,3-/3-and 1,6-/3-glucanase (Taylor et al, 1987;Polak, 1989;Dixon et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

β-Glucosylated proteins in the cell wall of the black yeast Exophiala (Wangiella) dermatitidis

et al. 1997

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Wild-type cells of the pathogenic black yeast Exophiala (Wangie//a) dermatitidis grown in a low-pH ascorbate medium became less melanized and less resistant to Zymolyase. This was accompanied by increased staining with fluorescently labelled concanavalin A. The sugar composition of wild-type and mutant cell walls was, except for the presence of galactose, similar to that of Saccharomyces cefevisiae. Digestion of mutant cell walls with laminarinase released galactomannoproteins. In addition, the released cell wall proteins contained glucose and reacted with affinity-purified 1,6-j?-glucan antiserum, indicating that they are linked to 1,6-&glucan. It is proposed that l,6-& glucosylated cell wall proteins generally occur among ascomycetes.

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Carotenoid Pigments of the Dematiaceous FungusWangiella Dermatitidis

Cited by 32 publications

References 16 publications

Visible light during mycelial growth and conidiation of Metarhizium robertsii produces conidia with increased stress tolerance

Visible light during mycelial growth and conidiation of Metarhizium robertsii produces conidia with increased stress tolerance

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

β-Glucosylated proteins in the cell wall of the black yeast Exophiala (Wangiella) dermatitidis

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