Light- and singlet oxygen-mediated antifungal activity of phenylphenalenone phytoalexins

被引：0
|
作者：
Alejandra Lazzaro
Montserrat Corominas
Cristina Martí
Cristina Flors
Laura R. Izquierdo
Teresa A. Grillo
Javier G. Luis
Santi Nonell
机构：
[1] Universitat Ramon Llull,Grup d’Enginyeria Molecular, Institut Químic de Sarrià
[2] Universidad de La Laguna,Instituto Universitario de Bio
来源：
Photochemical & Photobiological Sciences | 2004年 / 3卷
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摘要：
The light-induced singlet oxygen production and antifungal activity of phenylphenalenone phytoalexins isolated from infected banana plants (Musa acuminata) are reported. Upon absorption of light energy all studied phenylphenalenones sensitise the production of singlet oxygen in polar and non-polar media. Antifungal activity of these compounds towards Fusarium oxysporum is enhanced in the presence of light. These results, together with the correlation of IC50 values under illumination with the quantum yield of singlet oxygen production and the enhancing effect of D2O on the antifungal activity, suggest the intermediacy of singlet oxygen produced by electronic excitation of the phenylphenalenone phytoalexins.
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页码：706 / 710
页数：4
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