The Venus flytrap trigger hair-specific potassium channel KDM1 can reestablish the K+ gradient required for hapto-electric signaling
| العنوان: | The Venus flytrap trigger hair-specific potassium channel KDM1 can reestablish the K+ gradient required for hapto-electric signaling |
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| المؤلفون: | Sönke Scherzer, Ingo Dreyer, Jennifer Böhm, Rainer Hedrich, Jörg Schultz, Dirk Becker, Khaled A. S. Al-Rasheid, Anda Iosip, Ines Kreuzer |
| المصدر: | PLoS Biology, Vol 18, Iss 12, p e3000964 (2020) PLoS Biology |
| بيانات النشر: | Public Library of Science (PLoS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Leaves, Potassium Channels, Physiology, Turgor pressure, Gene Expression, Action Potentials, Plant Science, Biochemistry, 01 natural sciences, Ion Channels, Animal Cells, Gene Expression Regulation, Plant, Guard cell, Medicine and Health Sciences, Biology (General), Membrane potential, biology, integumentary system, Physics, Gene Ontologies, Plant Anatomy, General Neuroscience, Eukaryota, Genomics, Plants, Hyperpolarization (biology), Potassium channel, Cell biology, Electrophysiology, Experimental Organism Systems, OVA, Physical Sciences, Cellular Types, Anatomy, Integumentary System, General Agricultural and Biological Sciences, Mechanoreceptors, Research Article, Guard Cells, Signal Transduction, QH301-705.5, Arabidopsis Thaliana, Plant Cell Biology, Biophysics, Neurophysiology, Brassica, Research and Analysis Methods, Membrane Potential, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Model Organisms, Plant and Algal Models, Plant Cells, Genetics, Venus flytrap, Ions, General Immunology and Microbiology, Mechanosensation, Organisms, Biology and Life Sciences, Proteins, Computational Biology, Biological Transport, Cell Biology, Genome Analysis, biology.organism_classification, Electrophysiological Phenomena, Plant Leaves, Germ Cells, 030104 developmental biology, Animal Studies, Oocytes, Potassium, Transcriptome, Homeostasis, Neuroscience, Hair, Droseraceae, 010606 plant biology & botany |
| الوصف: | The carnivorous plant Dionaea muscipula harbors multicellular trigger hairs designed to sense mechanical stimuli upon contact with animal prey. At the base of the trigger hair, mechanosensation is transduced into an all-or-nothing action potential (AP) that spreads all over the trap, ultimately leading to trap closure and prey capture. To reveal the molecular basis for the unique functional repertoire of this mechanoresponsive plant structure, we determined the transcriptome of D. muscipula’s trigger hair. Among the genes that were found to be highly specific to the trigger hair, the Shaker-type channel KDM1 was electrophysiologically characterized as a hyperpolarization- and acid-activated K+-selective channel, thus allowing the reuptake of K+ ions into the trigger hair’s sensory cells during the hyperpolarization phase of the AP. During trap development, the increased electrical excitability of the trigger hair is associated with the transcriptional induction of KDM1. Conversely, when KDM1 is blocked by Cs+ in adult traps, the initiation of APs in response to trigger hair deflection is reduced, and trap closure is suppressed. KDM1 thus plays a dominant role in K+ homeostasis in the context of AP and turgor formation underlying the mechanosensation of trigger hair cells and thus D. muscipula’s hapto-electric signaling. Transcriptomic and electrophysiological studies of the carnivorous Venus flytrap reveal that potassium uptake via a trigger hair-specific potassium channel builds the basis for mechanosensation of likely prey and generation of an action potential that triggers closure of the trap. |
| اللغة: | English |
| تدمد: | 1545-7885 1544-9173 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6536d2a69caee7c29677a5cb9c76f269 https://doaj.org/article/bd416369494b4ff6a6a93c242962dc12 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....6536d2a69caee7c29677a5cb9c76f269 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15457885 15449173 |
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