Trichoderma asperellum as a preventive and curative agent to control Fusarium wilt in Stevia rebaudiana
Type de document
journalArticle
Langue source
Anglais
Titre français
Titre anglais
Trichoderma asperellum as a preventive and curative agent to control Fusarium wilt in Stevia rebaudiana
Auteur(s)
- DÍAZ-GUTIÉRREZ Carol
- ARROYAVE Catalina
- LLUGANY Mercè
- POSCHENRIEDER Charlotte
- MARTOS Soledad
- PELÁEZ Carlos
Editeur(s)
Autre(s)
Id
WMJH396R
Version
2388
Date ajout
28 janvier 2021 16:53
Date modification
28 janvier 2021 16:53
Résumé anglais
Stevia has been introduced in many countries for the production of sugar-free sweeteners. Concurrently, several emerging pathogens have been described in this plant host. One of the latest has been Fusarium oxysporum, a well-known soil-borne pathogen causing vascular wilt in many plants. Classical methods to control Fusarium wilt are being questioned, and biocontrol agents are gaining importance as part of integrated approaches to manage the disease. Different species of Trichoderma have been described as optimal candidates to control F. oxysporum. However, their effectiveness is generally reported in annual plants and efficacy depends on the application protocol. We conducted an experiment to assess the preventive or curative potential of the rhizospheric T. asperellum UDEAGIEM-H01 strain against F. oxysporum on rooted cuttings of S. rebaudiana. After 33 days, F. oxysporum-infected stevia seedlings were severely affected (90% of disease incidence). Contrastingly, only 10% of the T. asperellum pre-treated plants and 70% of the post-treated showed Fusarium wilt symptoms. Dual confrontation assays proved the potential antagonistic effect of T. asperellum against F. oxysporum and five additional soil-borne pathogens affecting S. rebaudiana. Further in vitro tests revealed that this new strain of T. asperellum produces phytohormones (salicylic and jasmonic acid), and the secretion of cell-wall degrading enzymes (chitinases and cellulases); this ability could be related to its antagonistic and mycoparasitic activity. The present work concluded that T. asperellum UDEAGIEM-H01 has a high ability, mainly as a preventive agent, to control F. oxysporum in stevia plants showing further antagonistic effects and mycoparasitism on other fungal pathogens.
Note
None
CRAW tags
- fusarium oxysporum
- trichoderma
- AB - Utile à l'AB
- FREDO lutte
- FREDO santé végétale
- GEO Colombie
- GEO Espagne
- stévia
WEB tags
- antagonism
- biological control
- mycoparasitism
Titre de la publication
Biological Control
Pages
104537
Date caractères
January 12, 2021
Date publication
12 janvier 2021
Doi
10.1016/j.biocontrol.2021.104537
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Issn
1049-9644
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