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Melanin is crucial for growth of the black yeast Hortaea werneckii in its natural hypersaline environmentKejžar, Anja ...Melanin has an important role in the ability of fungi to survive extreme conditions, like the high NaCl concentrations that are typical of hypersaline environments. The black fungus Hortaea werneckii ... that has been isolated from such environments has 1,8- dihydroxynaphthalene-melanin incorporated into the cell wall, which minimises the loss of glycerol at low NaCl concentrations. To further explore the role of melanin in the extremely halotolerant character of H. werneckii, we studied the effects of several melanin biosynthesis inhibitors on its growth, pigmentation and cell morphology. The most potent inhibitors were a 2,3-dihydrobenzofuran derivative and tricyclazole, which restricted the growth of H. werneckii on high-salinity media, as shown by growth curves and plate-drop assays. These inhibitors promoted release of the pigments from the H. werneckii cell surface and changed the medium colour. Inhibitor-treated H. werneckii cells exposed to high salinity showed both decreased and increased cell lengths. We speculate that this absence of melanin perturbs the integrity of the cell wall in H. werneckii, which affects its cell division and exposes it to the harmful effects of high NaCl concentrations. Surprisingly, melanin had no effect on H. werneckii survival under H2O2 oxidative stress.Source: Fungal biology. - ISSN 1878-6146 (Vol. 117, no. 5, May 2013, str. 368-379)Type of material - article, component partPublish date - 2013Language - englishCOBISS.SI-ID - 3441009
Author
Kejžar, Anja |
Gobec, Stanislav, 1970- |
Plemenitaš, Ana, 1952- |
Lenassi, Metka, 1978-
Topics
črne kvasovke |
melanin |
stres |
Hortaea werneckii |
triciklazol
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kejžar, Anja | 34355 |
Gobec, Stanislav, 1970- | 15284 |
Plemenitaš, Ana, 1952- | 06777 |
Lenassi, Metka, 1978- | 24288 |
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