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Hydroxamate siderophores secreted by plant endophytic Pseudomonas putida elicit defense against blast disease in rice incited by Magnaporthe oryzae.
- Source :
-
Letters in Applied Microbiology . Dec2023, Vol. 76 Issue 12, p1-10. 10p. - Publication Year :
- 2023
-
Abstract
- Our study focuses on hydroxamate-type siderophores from Pseudomonas putida BP25, known for chelating ferric iron and aiding microbial growth in iron-deficient environments. Confirmed through CAS-agar and tetrazolium tests, a purified siderophore extract was obtained via ion-exchange chromatography. Applying varying concentrations of this siderophore to rice seedlings demonstrated concentration-dependent effects on shoot and root phenotypes. Prophylactic application on rice leaves significantly reduced blast severity (68.7%–97.0%), surpassing curative application (47.5%–86.87%). Additionally, the siderophore treatment elevated peroxidase, polyphenol oxidase, and total phenols in rice plants. Defense-related genes linked to salicylic acid (OsPR1.1, OsNPR1 , and OsPDF2.2), and other pathways (Oshox24, OsCLE , and OsGLP3-3, OsEIN2.4 , and OsCSE) promoting blast suppression showed upregulation. However, the OsACS6 gene associated with ethylene-induced internodal elongation was significantly downregulated. Overall, our findings propose that the siderophore from P. putida BP25 induces defense gene transcription, offering potential for sustainable rice production via bio-formulation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02668254
- Volume :
- 76
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Letters in Applied Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 174978916
- Full Text :
- https://doi.org/10.1093/lambio/ovad139