A New Promising Plant Defense Stimulator Derived from a By-Product of Agar Extraction from Gelidium sesquipedale - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue (Data Paper) Horticulturae Année : 2022

A New Promising Plant Defense Stimulator Derived from a By-Product of Agar Extraction from Gelidium sesquipedale

Résumé

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.
Fichier principal
Vignette du fichier
horticulturae-08-00958-v2.pdf (2.02 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04148828 , version 1 (03-07-2023)

Identifiants

Citer

Rromir Koçi, Fabrice Dupuy, Vincent Gloaguen, Céline Faugeron Girard. A New Promising Plant Defense Stimulator Derived from a By-Product of Agar Extraction from Gelidium sesquipedale. Horticulturae, 2022, 8 (10), pp.958. ⟨10.3390/horticulturae8100958⟩. ⟨hal-04148828⟩

Collections

UNILIM E2LIM IMPEO
21 Consultations
35 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More