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Title 

Comparative Influence of Flavonoids on the Toxicity of Copper to Alternaria alternata

Authors 

S H ParkO S KwonC W ChoiChang Jin Kim

Publisher 

Wiley-Blackwell

Issue Date 

2000

Citation 

Journal of Phytopathology, vol. 148, no. 11, pp. 597-599

Keywords 

alternaria alternatacopper toxicityflavonoidsprotectionalternaria

Abstract 

Three flavonols, morin, rutin and quercetin, and a flavonone, naringenin, were in vitro tested for their influence on the toxicity of copper to Alternaria alternata. Copper sulphate (CuSO4) displayed dose-dependent inhibition of fungal growth, resulting in a reduction in growth by one-half at 0.07 mM. The addition of quercetin and morin conferred substantial protection against the inhibition of fungal growth by copper, whereas naringenin and rutin offered protection less effectively. Higher concentrations of copper could overcome the flavonoid effect, but the reduction of copper toxicity was more apparent in the presence of quercetin than morin. The metal chelating ability of quercetin was highly specific for copper among toxic metals such as Co, Ni, Zn, and Cd. The results show that the protection effect of the flavonoids against copper toxicity is highly dependent on the keto function and hydroxyl group substitution of the flavonoid skeleton.

ISSN 

0931-1785

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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