Arsenate resistance in the ericoid mycorrhizal fungus Hymenoscyphus ericae
Data(s) |
2001
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Resumo |
<p>• Differential resistance to arsenate (AsO<sub>4</sub> <sup>3-</sup>) is demonstrated here among populations of the ericoid mycorrhizal fungus Hymenoscyphus ericae isolated from Calluna vulgaris in natural heathland soils and soils contaminated with AsO<sub>4</sub> <sup>3-</sup>. • Isolates (c. 25) of the fungus from each of two As and Cu mine sites, and a natural heathland site, were screened for AsO<sub>4</sub> <sup>3-</sup> and Cu<sup>2+</sup> resistance by growing isolates in media containing a range of AsO<sub>4</sub> <sup>3-</sup> and Cu<sup>2+</sup> concentrations. • H. ericae populations from the mine sites demonstrated resistance to AsO<sub>4</sub> <sup>3-</sup> compared with the heathland population; the mine-site populations producing significant growth at the highest AsO<sub>4</sub> <sup>3-</sup> concentration (4.67 mol m<sup>-3</sup>), whereas growth of the heathland population was almost completely inhibited. EC<sub>50</sub> values for mine-site isolates were estimated to be 5-41-times higher than the heathland population. All isolates produced identical responses to increasing Cu<sup>2+</sup> concentrations, with no differences observed between mine-site and heathland isolates. • Populations of H. ericae on the contaminated mine sites have developed adaptive resistance to AsO<sub>4</sub> <sup>3-</sup>. By contrast, Cu<sup>2+</sup> resistance appears to be constitutive.</p> |
Identificador |
http://dx.doi.org/10.1046/j.1469-8137.2001.00146.x http://www.scopus.com/inward/record.url?scp=0034936953&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Sharples , J M , Meharg , A A , Chambers , S M & Cairney , J W G 2001 , ' Arsenate resistance in the ericoid mycorrhizal fungus Hymenoscyphus ericae ' New Phytologist , vol 151 , no. 1 , pp. 265-270 . DOI: 10.1046/j.1469-8137.2001.00146.x |
Palavras-Chave | #Arsenate #Calluna vulgaris #Copper #Ericoid mycorrhiza #Hymenoscyphus ericae #Metal tolerance #/dk/atira/pure/subjectarea/asjc/1100/1110 #Plant Science #/dk/atira/pure/subjectarea/asjc/1300 #Biochemistry, Genetics and Molecular Biology(all) #/dk/atira/pure/subjectarea/asjc/1300/1303 #Biochemistry |
Tipo |
article |