| Autor: |
Rromir Koçi, Fabrice Dupuy, Salim Lebbar, Vincent Gloaguen, Céline Faugeron Girard |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Horticulturae, Vol 8, Iss 10, p 958 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2311-7524 |
| DOI: |
10.3390/horticulturae8100958 |
| Popis: |
Stimulation of plant defenses by elicitors is an alternative strategy to reduce pesticide use. In this study, we examined the elicitor properties of a by-product of the industrial extraction of agar from the red alga Gelidium sesquipedale. Agar extraction process leads to the formation of an alkaline residue which is poorly valorized. This by-product has been analyzed for its chemical composition. It contains 44% minerals and, among the organic compounds, sugars are the most represented and encompass 12.5% of the dry matter. When sprayed on tomato plants, this by-product enhanced the levels of defense markers such as peroxidase or phenylalanine ammonia lyase activities. Furthermore, this treatment increased the expression levels of the pathogenesis-related gene, PR9 encoding peroxidase. A field trial conducted on grapevine revealed that spraying treatment with this by-product resulted in a reduction of the macroscopic disease symptoms induced by Plasmospora viticola, with 40 to 60% efficacy. These results indicate that this agar extraction by-product could be used as a plant defense stimulator. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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