Publications des scientifiques de l'IRD

Chen J., Fernandez Diana, Wang D. D., Chen Y. J., Dai G. H. (2014). Biological control mechanisms of D-pinitol against powdery mildew in cucumber. Physiological and Molecular Plant Pathology, 88, p. 52-60. ISSN 0885-5765.

Titre du document
Biological control mechanisms of D-pinitol against powdery mildew in cucumber
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000345697900008
Auteurs
Chen J., Fernandez Diana, Wang D. D., Chen Y. J., Dai G. H.
Source
Physiological and Molecular Plant Pathology, 2014, 88, p. 52-60 ISSN 0885-5765
D-pinitol is an effective agent for controlling powdery mildew (Podosphaera xanthii) in cucumber. In this study, we determined the mechanisms of D-pinitol in controlling powdery mildew in cucumber plants. We compared P. xanthii development on cucumber leaf surface treated with D-pinitol or water (2 mg ml(-1)) at different time points after inoculation. The germinating conidia, hyphae, and conidiophores of the pathogen were severely damaged by D-pinitol at any time of application tested. The highest level of suppression of fungal development was obtained at 3 days after inoculation. The contents of chlorophyll, total phenolics, flavonoid, and gallic acid and its derivatives (GAD); the activities of phenylalanine ammonialyase (PAL), polyphenoloxidase (PPO), peroxidase (POX), and superoxide dismutase (SOD); and the expression of the genes encoding for PR-1, peroxidase (POX), lipoxygenase (LOX1), chitinase (Chit1) were higher in the cucumber leaves treated with D-pinitol and inoculated than in the leaves either treated with D-pinitol or inoculated with the pathogen. These results suggest that D-pinitol triggers several plant defense responses in cucumber leading to pathogen suppression and resistance to powdery mildew.
Plan de classement
Sciences du monde végétal [076]
Localisation
Fonds IRD [F B010063125]
Identifiant IRD
fdi:010063125
Contact