Loss-of-function of NITROGEN LIMITATION ADAPTATION confers disease resistance in Arabidopsis by modulating hormone signaling and camalexin content
Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.
| Veröffentlicht in: | Plant science : an international journal of experimental plant biology. - 1985. - 323(2022) vom: 15. Okt., Seite 111374 |
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| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2022
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| Zugriff auf das übergeordnete Werk: | Plant science : an international journal of experimental plant biology |
| Schlagworte: | Journal Article Arabidopsis Camalexin Jasmonic acid Phosphate Plectosphaerella cucumerina Salicylic acid Arabidopsis Proteins Hormones Indoles mehr... |
| Zusammenfassung: | Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved. Phosphorus is an important macronutrient required for plant growth and development. It is absorbed by the roots in the form of inorganic phosphate (Pi). Under Pi limiting conditions, plants activate the Phosphate Starvation Response (PSR) system to enhance Pi acquisition. The NITROGEN LIMITATION ADAPTION (NLA) gene is a component of the Arabidopsis PSR, and its expression is post-transcriptionally regulated by miR827. We show that loss-of-function of NLA and MIR827 overexpression increases Pi level and enhances resistance to infection by the fungal pathogen Plectosphaerella cucumerina in Arabidopsis. Upon pathogen infection, high Pi plants (e.g. nla plants and wild type plants grown under high Pi supply) showed enhanced callose deposition. High Pi plants also exhibited superinduction of camalexin biosynthesis genes which is consistent with increased levels of camalexin during pathogen infection. Pathogen infection and treatment with fungal elicitors, triggered up-regulation of MIR827 and down-regulation of NLA expression. Under non-infection conditions, the nla plants showed increased levels of SA and JA compared with wild type plants, their levels further increasing upon pathogen infection. Overall, the outcomes of this study suggest that NLA plays a role in Arabidopsis immunity, while supporting convergence between Pi signaling and immune signaling in Arabidopsis |
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| Beschreibung: | Date Completed 01.09.2022 Date Revised 06.09.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2022.111374 |