Elicitor activity of curdlan and its potential application in protection of hass avocado plants against phytophthora cinnamomi rands

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2022Author
Guarnizo, Nathalie
Álvarez, Andree
Oliveros, Diego Fernándo
Barbosa, Oveimar
Eras Joli, Jordi
Bermúdez-Cardona, María Bianney
Murillo, Walter
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Guarnizo, Nathalie;
Álvarez, Andree;
Oliveros, Diego Fernándo;
Barbosa, Oveimar;
Eras Joli, Jordi;
Bermúdez-Cardona, María Bianney;
Murillo, Walter;
.
(2022)
.
Elicitor activity of curdlan and its potential application in protection of hass avocado plants against phytophthora cinnamomi rands.
Horticulturae, 2022, vol. 8, núm. 7, p. 1-13.
https://doi.org/10.3390/horticulturae8070646.
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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
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Horticulturae, 2022, vol. 8, núm. 7, p. 1-13European research projects
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