A calmodulin‐like protein regulates plasmodesmal closure during bacterial immune responses
| Autor: | Christine Faulkner, Matthew Gilliham, Cécilia Cheval, Anuphon Laohavisit, David Chiasson, Bradleigh Hocking, Bo Xu, Ken Shirasu, Tjelvar S. G. Olsson |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology electrophoresis mobility shift pathogen‐associated molecular pattern (PAMP) Arabidopsis Plant Science Plasmodesma Biology 01 natural sciences maltose‐binding protein Microbiology 03 medical and health sciences chemistry.chemical_compound biotic stress Bacterial Proteins Calmodulin Downregulation and upregulation Pseudomonas syringae Calcium Signaling At3g50770 Cloning Molecular cell‐to‐cell communication Rapid Report Arabidopsis Proteins Research Binding protein Calcium-Binding Proteins Callose Plasmodesmata Pattern recognition receptor Biotic stress Cell biology 030104 developmental biology chemistry Receptors Pattern Recognition Rapid Reports Flux (metabolism) Flagellin 010606 plant biology & botany |
| Zdroj: | The New Phytologist |
| ISSN: | 1469-8137 0028-646X |
| Popis: | Summary Plants sense microbial signatures via activation of pattern recognition receptors (PPRs), which trigger a range of cellular defences. One response is the closure of plasmodesmata, which reduces symplastic connectivity and the capacity for direct molecular exchange between host cells.Plasmodesmal flux is regulated by a variety of environmental cues but the downstream signalling pathways are poorly defined, especially the way in which calcium regulates plasmodesmal closure.Here, we identify that closure of plasmodesmata in response to bacterial flagellin, but not fungal chitin, is mediated by a plasmodesmal‐localized Ca2+‐binding protein Calmodulin‐like 41 (CML41). CML41 is transcriptionally upregulated by flg22 and facilitates rapid callose deposition at plasmodesmata following flg22 treatment. CML41 acts independently of other defence responses triggered by flg22 perception and reduces bacterial infection.We propose that CML41 enables Ca2+‐signalling specificity during bacterial pathogen attack and is required for a complete defence response against Pseudomonas syringae. |
| Databáze: | OpenAIRE |
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