Improving the Biocontrol Potential of Bacterial Antagonists with Salicylic Acid against Brown Rot Disease and Impact on Nectarine Fruits Quality - Université de Reims Champagne-Ardenne Accéder directement au contenu
Article Dans Une Revue Agronomy Année : 2021

Improving the Biocontrol Potential of Bacterial Antagonists with Salicylic Acid against Brown Rot Disease and Impact on Nectarine Fruits Quality

Nadia Lyousfi
  • Fonction : Auteur
Rachid Lahlali
Chaimaa Letrib
  • Fonction : Auteur
Zineb Belabess
  • Fonction : Auteur
Rachida Ouaabou
  • Fonction : Auteur
Said Ennahli
  • Fonction : Auteur
Abdelali Blenzar
  • Fonction : Auteur

Résumé

The main objective of this study was to evaluate the ability of both antagonistic bacteria Bacillus amyloliquefaciens (SF14) and Alcaligenes faecalis (ACBC1) used in combination with salicylic acid (SA) to effectively control brown rot disease caused by Monilinia fructigena. Four concentrations of salicylic acid (0.5%, 2%, 3.5%, and 5%) were tested under in vitro and in vivo conditions. Furthermore, the impact of biological treatments on nectarine fruit parameters’ quality, in particular, weight loss, titratable acidity, and soluble solids content, was evaluated. Regardless of the bacterium, the results indicated that all combined treatments displayed a strong inhibitory effect on the mycelial growth of M. fructigena and disease severity. Interestingly, all SA concentrations significantly improved the biocontrol activity of each antagonist. The mycelial growth inhibition rate ranged from 9.79% to 88.02% with the highest reduction rate recorded for bacterial antagonists in combination with SA at both concentrations of 0.5% and 3.5%. The in vivo results confirmed the in vitro results with a disease severity varying from 0.00% to 51.91%. A significant biocontrol improvement was obtained with both antagonistic bacteria when used in combination with SA at concentrations of 0.5% and 2%. The lowest disease severity observed with ACBC1 compared with SF14 is likely due to a rapid adaptation and increase of antagonistic bacteria population in wounded sites. The impact of all biological treatments revealed moderate significant changes in the fruit quality parameters with weight loss for several treatments. These results suggest that the improved disease control of both antagonistic bacteria was more likely directly linked to both the inhibitory effects of SA on pathogen growth and induced fruit resistance.

Dates et versions

hal-03279364 , version 1 (06-07-2021)

Identifiants

Citer

Nadia Lyousfi, Rachid Lahlali, Chaimaa Letrib, Zineb Belabess, Rachida Ouaabou, et al.. Improving the Biocontrol Potential of Bacterial Antagonists with Salicylic Acid against Brown Rot Disease and Impact on Nectarine Fruits Quality. Agronomy, 2021, 11 (2), pp.209. ⟨10.3390/agronomy11020209⟩. ⟨hal-03279364⟩

Collections

URCA RIBP
14 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More