Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi

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Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi. / Griffith, Garth; Easton, Gary L.; Detheridge, Andrew; Roderick, Kevin; Edwards, Arwyn; Worgan, Hilary J.; Nicholson, Jean; Perkins, William T.

Yn: FEMS Microbiology Letters, Cyfrol 276, Rhif 2, 11.2007, t. 165-171.

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Griffith, Garth ; Easton, Gary L. ; Detheridge, Andrew ; Roderick, Kevin ; Edwards, Arwyn ; Worgan, Hilary J. ; Nicholson, Jean ; Perkins, William T. / Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi. Yn: FEMS Microbiology Letters. 2007 ; Cyfrol 276, Rhif 2. tt. 165-171.

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@article{1cf3a26b7387464bb99151d713505307,
title = "Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi",
abstract = "Potato dextrose agar (PDA) is one of the most commonly used media for the isolation and cultivation of fungi, with morphological features and pigmentation in culture often being important for identification of cultures. Cultivation of various fungi on different brands and batches of powdered (commercial) potato dextrose media revealed deficient pigmentation in five of 10 media tested. Reduced pigmentation on these media was correlated with low levels of copper and colony colour was restored by the addition of copper. Deficient pigmentation was most pronounced when copper levels in the medium were below 50 ng mL−1 (50 p.p.b.; 0.8 μM). Differences in pigmentation and laccase activity of spore and mycelial preparations were quantified for representative species belonging to the genera Aspergillus, Fusarium, Trichoderma, Cladosporium and Penicillium grown on PDA containing different amounts of copper. A strong positive correlation between laccase activity and copper levels was observed. Differences were also found between batches of raw potatoes, with organically cultivated tubers having higher copper levels than those grown by conventional methods, possibly because of the use of copper-based fungicides in the former case. Routine addition of 1000 ng mL−1 copper (or standard trace element solutions) to PDA and other undefined media is advised to avoid atypical culture pigmentation and possibly other consequences of reduced activity of copper-requiring enzymes.",
author = "Garth Griffith and Easton, {Gary L.} and Andrew Detheridge and Kevin Roderick and Arwyn Edwards and Worgan, {Hilary J.} and Jean Nicholson and Perkins, {William T.}",
note = "Griffith, G. W., Easton, G. L., Detheridge, A., Roderick, K., Edwards, A., Worgan, H. J., Nicholson, J., Perkins, W. T. (2007). Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi. FEMS Microbiology Letters, 276 (2), 165-171.",
year = "2007",
month = nov,
doi = "10.1111/j.1574-6968.2007.00923.x",
language = "English",
volume = "276",
pages = "165--171",
journal = "FEMS Microbiology Letters",
issn = "0378-1097",
publisher = "Wiley",
number = "2",

}

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TY - JOUR

T1 - Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi

AU - Griffith, Garth

AU - Easton, Gary L.

AU - Detheridge, Andrew

AU - Roderick, Kevin

AU - Edwards, Arwyn

AU - Worgan, Hilary J.

AU - Nicholson, Jean

AU - Perkins, William T.

N1 - Griffith, G. W., Easton, G. L., Detheridge, A., Roderick, K., Edwards, A., Worgan, H. J., Nicholson, J., Perkins, W. T. (2007). Copper deficiency in potato dextrose agar causes reduced pigmentation in cultures of various fungi. FEMS Microbiology Letters, 276 (2), 165-171.

PY - 2007/11

Y1 - 2007/11

N2 - Potato dextrose agar (PDA) is one of the most commonly used media for the isolation and cultivation of fungi, with morphological features and pigmentation in culture often being important for identification of cultures. Cultivation of various fungi on different brands and batches of powdered (commercial) potato dextrose media revealed deficient pigmentation in five of 10 media tested. Reduced pigmentation on these media was correlated with low levels of copper and colony colour was restored by the addition of copper. Deficient pigmentation was most pronounced when copper levels in the medium were below 50 ng mL−1 (50 p.p.b.; 0.8 μM). Differences in pigmentation and laccase activity of spore and mycelial preparations were quantified for representative species belonging to the genera Aspergillus, Fusarium, Trichoderma, Cladosporium and Penicillium grown on PDA containing different amounts of copper. A strong positive correlation between laccase activity and copper levels was observed. Differences were also found between batches of raw potatoes, with organically cultivated tubers having higher copper levels than those grown by conventional methods, possibly because of the use of copper-based fungicides in the former case. Routine addition of 1000 ng mL−1 copper (or standard trace element solutions) to PDA and other undefined media is advised to avoid atypical culture pigmentation and possibly other consequences of reduced activity of copper-requiring enzymes.

AB - Potato dextrose agar (PDA) is one of the most commonly used media for the isolation and cultivation of fungi, with morphological features and pigmentation in culture often being important for identification of cultures. Cultivation of various fungi on different brands and batches of powdered (commercial) potato dextrose media revealed deficient pigmentation in five of 10 media tested. Reduced pigmentation on these media was correlated with low levels of copper and colony colour was restored by the addition of copper. Deficient pigmentation was most pronounced when copper levels in the medium were below 50 ng mL−1 (50 p.p.b.; 0.8 μM). Differences in pigmentation and laccase activity of spore and mycelial preparations were quantified for representative species belonging to the genera Aspergillus, Fusarium, Trichoderma, Cladosporium and Penicillium grown on PDA containing different amounts of copper. A strong positive correlation between laccase activity and copper levels was observed. Differences were also found between batches of raw potatoes, with organically cultivated tubers having higher copper levels than those grown by conventional methods, possibly because of the use of copper-based fungicides in the former case. Routine addition of 1000 ng mL−1 copper (or standard trace element solutions) to PDA and other undefined media is advised to avoid atypical culture pigmentation and possibly other consequences of reduced activity of copper-requiring enzymes.

UR - http://hdl.handle.net/2160/8939

U2 - 10.1111/j.1574-6968.2007.00923.x

DO - 10.1111/j.1574-6968.2007.00923.x

M3 - Article

VL - 276

SP - 165

EP - 171

JO - FEMS Microbiology Letters

JF - FEMS Microbiology Letters

SN - 0378-1097

IS - 2

ER -

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