Elicitor Activity of Curdlan and Its Potential Application in Protection of Hass Avocado Plants against Phytophthora cinnamomi Rands

Phytophthora cinnamomi causes one of the most important diseases in avocado crop and its chemical management represents 25% of the production cost per year. Induction of plant defense responses by elicitors is a promising strategy that is compatible with sustainable agriculture. This study aimed to...

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Bibliographic Details
Published in:Horticulturae 2022-07, Vol.8 (7), p.646
Main Authors: Guarnizo, Nathalie, Álvarez, Andree, Oliveros, Diego, Barbosa, Oveimar, Joli, Jordi Eras, Bermúdez-Cardona, María Bianney, Murillo-Arango, Walter
Format: Article
Language:English
Subjects:
Ammonium
Antioxidants
avocado
Carotenoids
Chlorophyll
Crop diseases
curdlan
Defense mechanisms
defense-related enzymes
Enzymes
Fungicides
induced resistance
Inoculation
Pathogens
Peroxidase
Pesticides
Phenylalanine
Phytophthora cinnamomi
Polyphenol oxidase
Production costs
Proteins
Spraying
Superoxide dismutase
Sustainable agriculture
Wilting
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Summary:Phytophthora cinnamomi causes one of the most important diseases in avocado crop and its chemical management represents 25% of the production cost per year. Induction of plant defense responses by elicitors is a promising strategy that is compatible with sustainable agriculture. This study aimed to evaluate the effect of curdlan application on the induction of defense responses in avocado plants against P. cinnamomi. The trials were conducted under greenhouse conditions, and curdlan leaf spraying was performed one day before the inoculation of the pathogen. The results showed that the application of elicitor significantly increased the protection of avocado plants against P. cinnamomi, decreasing the injury and wilting. The Curd + Phy treatment improved the defenses of plants by increasing the enzymes peroxidase (POD) and polyphenol oxidase (PPO) in the first 3 h after inoculation and increasing the enzymes superoxide dismutase (SOD) and phenylalanine ammonium lyase (PAL) 144 h after inoculation (p < 0.05). Also, chlorophyll and carotenoid content increased or remained stable in Curd + Phy treatment. Therefore, these results suggest that curdlan increases the protection against P. cinnamomi and its protection could be due to an increase in the activity of the enzymes related to the phenylpropanoid pathway as well as the effect on chlorophyll and carotenoids.
ISSN:2311-7524
2311-7524
DOI:10.3390/horticulturae8070646