Dephosphorylation of the MAP kinases MPK6 and MPK3 fine-tunes responses to wounding and herbivory in Arabidopsis
Copyright © 2023 Elsevier B.V. All rights reserved.
| Publié dans: | Plant science : an international journal of experimental plant biology. - 1985. - 339(2024) vom: 15. Feb., Seite 111962 |
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| Auteur principal: | |
| Autres auteurs: | , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2024
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| Accès à la collection: | Plant science : an international journal of experimental plant biology |
| Sujets: | Journal Article Abscisic acid Herbivory Jasmonic acid MAP kinase MAPK phosphatase Salicylic acid AP2C1 protein, Arabidopsis EC 3.1.3.16 Arabidopsis Proteins plus... |
| Résumé: | Copyright © 2023 Elsevier B.V. All rights reserved. The Arabidopsis MAP Kinases (MAPKs) MPK6 and MPK3 and orthologs in other plants function as major stress signaling hubs. MAPKs are activated by phosphorylation and are negatively regulated by MAPK-inactivating phosphatases (MIPPs), which alter the intensity and duration of MAPK signaling via dephosphorylation. Unlike in other plant species, jasmonic acid (JA) accumulation in Arabidopsis is apparently not MPK6- and MPK3-dependent, so their role in JA-mediated defenses against herbivorous insects is unclear. Here we explore whether changes in MPK6/3 phosphorylation kinetics in Arabidopsis MIPP mutants lead to changes in hormone synthesis and resistance against herbivores. The MIPPs MKP1, DsPTP1, PP2C5, and AP2C1 have been implicated in responses to infection, drought, and osmotic stress, which all impinge on JA-mediated defenses. In loss-of-function mutants, we found that the four MIPPs alter wound-induced MPK6/3 phosphorylation kinetics and affect the accumulation of the defense hormones JA, abscisic acid, and salicylic acid, as compared to wild type plants (Col-0). Moreover, MPK6/3 misregulation in MIPP or MAPK mutant plants resulted in slight changes in the resistance to Trichoplusia ni and Spodoptera exigua larvae as compared to Col-0. Our data indicate that MPK6/3 and the four MIPPs moderately contribute to wound signaling and defense against herbivorous insects in Arabidopsis |
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| Description: | Date Completed 17.01.2024 Date Revised 17.01.2024 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2023.111962 |