Tao, C.-N. and Ton, J. orcid.org/0000-0002-8512-2802 (2024) Role of PMR4 and PDLP1 in priming of early acting penetration defence by resistance-inducing β-amino acids. iScience, 27 (3). 109299. ISSN 2589-0042
Abstract
R-β-homoserine (RBH) and β-aminobutyric acid (BABA) induce resistance against the oomycete Hyaloperonospora arabidopsidis (Hpa) in Arabidopsis, which is based on priming of multiple defence layers, including early-acting penetration resistance at the cell wall. Here, we have examined the molecular basis of RBH- and BABA-primed defence by cell wall papillae against Hpa. Three-dimensional reconstruction of Hpa-induced papillae by confocal microscopy revealed no structural differences between control-, RBH- and BABA-treated plants after Hpa challenge. However, mutation of POWDERY MILDEW RESISTANT4 and PLASMODESMATA LOCATED PROTEINS (PDLPs) only impaired BABA-induced penetration resistance and not RBH-induced penetration resistance. Furthermore, PDLP1 over-expression mimicked primed penetration resistance, while the intensity of GFP-tagged PDLP1 at germinating Hpa conidiospores was increased in BABA-primed plants but not RBH-primed plants. Our study reveals new regulatory layers of immune priming by β-amino acids and supports the notion that penetration resistance is a multifaceted defence layer that can be achieved through distinct pathways.
Metadata
Item Type: | Article | ||||||||
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | ||||||||
Keywords: | callose; β-amino acids; induced resistance; Hyaloperonospora arabidopsidis; defence priming; PLASMODESMATA LOCATED PROTEINS; penetration resistance | ||||||||
Dates: |
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Institution: | The University of Sheffield | ||||||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Biosciences (Sheffield) | ||||||||
Funding Information: |
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Depositing User: | Symplectic Sheffield | ||||||||
Date Deposited: | 29 Feb 2024 15:03 | ||||||||
Last Modified: | 15 Mar 2024 12:21 | ||||||||
Status: | Published | ||||||||
Publisher: | Elsevier BV | ||||||||
Refereed: | Yes | ||||||||
Identification Number: | https://doi.org/10.1016/j.isci.2024.109299 |