Effect of Scoparone (6,7-Dimethoxycoumarin) Biosynthesis on the Resistance of Tangelo Nova, Citrus paradisi, and Citrus aurantium Fruits against Phytophthora parasitica

The biosynthesis of scoparone (6,7-dimethoxycoumarin) was associated with resistance of mature fruits of tangelo Nova, Citrus aurantium, and Citrus paradisi to infection by Phytophthora parasitica. Levels of scoparone increased by treating fruit with Brotomax, which also enhanced the resistance of f...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 1997-07, Vol.45 (7), p.2740-2743
Main Authors: Ortuño, A, Botía, J. M, Fuster, M. D, Porras, I, García-Lidón, A, Del Río, J. A
Format: Article
Language:English
Subjects:
AGENT PATHOGENE
Biological and medical sciences
CHEMICAL COMPOSITION
CITRUS
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
DISEASE RESISTANCE
ENFERMEDADES FUNGOSAS
FITOALEXINA
Fundamental and applied biological sciences. Psychology
FUNGAL DISEASES
Fungal plant pathogens
MALADIE FONGIQUE
ORGANISMOS PATOGENOS
PATHOGENS
Pathology, epidemiology, host-fungus relationships. Damages, economic importance
PHYTOALEXINE
PHYTOALEXINS
Phytopathology. Animal pests. Plant and forest protection
PHYTOPHTHORA NICOTIANAE PARASITICA
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
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Summary:The biosynthesis of scoparone (6,7-dimethoxycoumarin) was associated with resistance of mature fruits of tangelo Nova, Citrus aurantium, and Citrus paradisi to infection by Phytophthora parasitica. Levels of scoparone increased by treating fruit with Brotomax, which also enhanced the resistance of fruit to the fungus. Lesion development was reduced by as much as 40%. Scoparone is therefore proposed as a possible phytoalexin in fruits of these cultivars. Keywords: Citrus; coumarin; phytoalexin; scoparone
ISSN:0021-8561
1520-5118
DOI:10.1021/jf9609542