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

Alejandra Lazzaro; Montserrat Corominas; Cristina Martí; Cristina Flors; Laura R. Izquierdo; Teresa A. Grillo; Javier G. Luis; Santi Nonell

doi:10.1039/b401294a

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

Alejandra Lazzaro, Montserrat Corominas, Cristina Martí, Cristina Flors, Laura R. Izquierdo, Teresa A. Grillo, Javier G. Luis, Santi Nonell

Producció científica: Article en revista indexada › Article › Avaluat per experts

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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.

Idioma original	Anglès
Pàgines (de-a)	706-710
Nombre de pàgines	5
Revista	Photochemical and Photobiological Sciences
Volum	3
Número	7
DOIs	https://doi.org/10.1039/b401294a
Estat de la publicació	Publicada - 6 de jul. 2004

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title = "Light- and singlet oxygen-mediated antifungal activity of phenylphenalenone phytoalexins",

abstract = "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.",

keywords = "Phenalenone-type phytoalexins, Musa-acuminata, Natural-products, Resistance, Deactivation, Accumulation, Generation, Defense, Plants, Yields",

author = "Alejandra Lazzaro and Montserrat Corominas and Cristina Mart{\'i} and Cristina Flors and Izquierdo, {Laura R.} and Grillo, {Teresa A.} and Luis, {Javier G.} and Santi Nonell",

year = "2004",

month = jul,

day = "6",

doi = "10.1039/b401294a",

language = "English",

volume = "3",

pages = "706--710",

journal = "Photochemical and Photobiological Sciences",

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TY - JOUR

T1 - Light- and singlet oxygen-mediated antifungal activity of phenylphenalenone phytoalexins

AU - Lazzaro, Alejandra

AU - Corominas, Montserrat

AU - Martí, Cristina

AU - Flors, Cristina

AU - Izquierdo, Laura R.

AU - Grillo, Teresa A.

AU - Luis, Javier G.

AU - Nonell, Santi

PY - 2004/7/6

Y1 - 2004/7/6

N2 - 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.

AB - 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.

KW - Phenalenone-type phytoalexins

KW - Musa-acuminata

KW - Natural-products

KW - Resistance

KW - Deactivation

KW - Accumulation

KW - Generation

KW - Defense

KW - Plants

KW - Yields

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U2 - 10.1039/b401294a

DO - 10.1039/b401294a

M3 - Article

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AN - SCOPUS:4344596904

SN - 1474-905X

VL - 3

SP - 706

EP - 710

JO - Photochemical and Photobiological Sciences

JF - Photochemical and Photobiological Sciences

IS - 7

ER -

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

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