Tissue-specific synergistic bio-priming of pepper by two Streptomyces species against Phytophthora capsici.
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2020
2020
Historique:
received:
01
11
2019
accepted:
02
03
2020
entrez:
20
3
2020
pubmed:
20
3
2020
medline:
24
6
2020
Statut:
epublish
Résumé
Among several studied strains, Streptomyces rochei IT20 and S. vinaceusdrappus SS14 showed a high level of inhibitory effect against Phytophthora capsici, the causal agent of pepper blight. The effect of two mentioned superior antagonists, as single or combination treatments, on suppression of stem and fruit blight diseases and reproductive growth promotion was investigated in pepper. To explore the induced plant defense reactions, ROS generation and transcriptional changes of selected genes in leaf and fruit tissues of the plant were evaluated. The plants exposed to the combination of two species responded differently in terms of H2O2 accumulation and expression ratio of GST gene compared to single treatments upon pathogen inoculation. Besides, the increment of shoot length, flowering, and fruit weight were observed in healthy plants compared to control. Likely, these changes depended on the coordinated relationships between PR1, ACCO genes and transcription factors WRKY40 enhanced after pathogen challenge. Our findings indicate that appropriate tissue of the host plant is required for inducing Streptomyces-based priming and relied on the up-regulation of SUS and differential regulation of ethylene-dependent genes.
Identifiants
pubmed: 32191748
doi: 10.1371/journal.pone.0230531
pii: PONE-D-19-30373
pmc: PMC7082030
doi:
Substances chimiques
Aminobutyrates
0
3-aminobutyric acid
4282SA5CTS
Hydrogen Peroxide
BBX060AN9V
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0230531Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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