Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 164, Issue -, Pages 4054-4064Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.09.026
Keywords
Oligogalacturonides; Arabidopsis thaliana; Pst DC3000; Disease resistance; Salicylic acid; Jasmonic acid
Funding
- National Key Research and Development Project of China [2017YFD0209000, 2017YFD0209002]
- Chinese National Nature Science Foundation, China [31971217, 31672077]
- Liaoning Revitalization Talents Program [XLYC1807041]
- CASTWAS President Fellowship PhD program
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Oligogalacturonides (OGAs) are a biologically active carbohydrate derived from homogalacturonan, a major element of cell wall pectin. OGAs induced resistance and mechanism were assessed in Arabidopsis thaliana-Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) interaction. The effective resistance was mainly observed at 25 mg/L OGAs with reduced disease index, bacterial multiplication, higher transcript level of salicylic acid (SA) pathway related genes (PR1, PR2, PR5) and jasmonic acid (JA) pathway related genes (PDF1.2, VSP2) as well as SA, JA content and production of reactive oxygen species (ROS), nitric oxide (NO). In SA (NahG, sid2) and JA (jar1) deficient mutants, disease severity indicated that both SA and JA pathways are necessary for Arabidopsis response to Pst DC3000. OGAs triggered less resistance to Pst DC3000 in JA-deficient mutant, and SA-deficient mutants signifying that SA and JA play redundant roles in OGAs induced resistance. Therefore, these evidences further reveal the signaling pathways of OGAs resistance, which is conducive to its application in agriculture to protect plants from diseases. (C) 2020 Elsevier B.V. All rights reserved.
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