ArticleProceedings of the National Academy of Sciences of the United States of America2015
Calcium sensor kinase activates potassium uptake systems in gland cells of Venus flytraps.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.
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44 citing papers in PubMed, 121 citations in OpenAlex.
- Glutathione induces trap closure for carnivory in Cape sundew.Science advances · 2026Article
- Transcriptomic prey-capture responses in convergently evolved carnivorous pitcher plants.The New phytologist · 2026Article
- Arabidopsis HAK5 under low KNature communications · 2024Article
- Genome-wide identification and expression analysis of the HAK/KUP/KT gene family in Moso bamboo.Frontiers in plant science · 2024Article
- Resveratrol enhances the tolerance ofFrontiers in plant science · 2024Article
- Potassium nutrient status drives posttranslational regulation of a low-K response network in Arabidopsis.Nature communications · 2023Article
- Identification and characteristics of SnRK genes and cold stress-induced expression profiles in Liriodendron chinense.BMC genomics · 2022Article
- Structural basis for the activity regulation of a potassium channel AKT1 from Arabidopsis.Nature communications · 2022Article
- The digestive systems of carnivorous plants.Plant physiology · 2022Review
- Receptor-like protein kinase BAK1 promotes K+ uptake by regulating H+-ATPase AHA2 under low potassium stress.Plant physiology · 2022Article
- Ether anesthetics prevents touch-induced trigger hair calcium-electrical signals excite the Venus flytrap.Scientific reports · 2022Article
- STOP1 RegulatesInternational journal of molecular sciences · 2021Article
- An endoplasmic reticulum-localized cytochromeProceedings of the National Academy of Sciences of the United States of America · 2021Article
- Signaling and transport processes related to the carnivorous lifestyle of plants living on nutrient-poor soil.Plant physiology · 2021Review
- Regulation of Cytosolic pH: The Contributions of Plant Plasma Membrane HInternational journal of molecular sciences · 2021Review
- Illuminating the hidden world of calcium ions in plants with a universe of indicators.Plant physiology · 2021Review
- Insights into the mechanisms of transport and regulation of the arabidopsis high-affinity K+ transporter HAK51.Plant physiology · 2021Article
- Crop Quality Improvement Through Genome Editing Strategy.Frontiers in genome editing · 2021Review
- The Potassium Transporter OsHAK5 Alters Rice Architecture via ATP-Dependent Transmembrane Auxin Fluxes.Plant communications · 2020Article
- KUP9 maintains root meristem activity by regulating KEMBO reports · 2020Article
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Authors and funding
12 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Darwin plant Dionaea muscipula is able to grow on mineral-poor soil, because it gains essential nutrients from captured animal prey. Given that no nutrients remain in the trap when it opens after the consumption of an animal meal, we here asked the question of how Dionaea sequesters prey-derived potassium. We show that prey capture triggers expression of a K(+) uptake system in the Venus flytrap. In search of K(+) transporters endowed with adequate properties for this role, we screened a Dionaea expressed sequence tag (EST) database and identified DmKT1 and DmHAK5 as candidates. On insect and touch hormone stimulation, the number of transcripts of these transporters increased in flytraps. After cRNA injection of K(+)-transporter genes into Xenopus oocytes, however, both putative K(+) transporters remained silent. Assuming that calcium sensor kinases are regulating Arabidopsis K(+) transporter 1 (AKT1), we coexpressed the putative K(+) transporters with a large set of kinases and identified the CBL9-CIPK23 pair as the major activating complex for both transporters in Dionaea K(+) uptake. DmKT1 was found to be a K(+)-selective channel of voltage-dependent high capacity and low affinity, whereas DmHAK5 was identified as the first, to our knowledge, proton-driven, high-affinity potassium transporter with weak selectivity. When the Venus flytrap is processing its prey, the gland cell membrane potential is maintained around -120 mV, and the apoplast is acidified to pH 3. These conditions in the green stomach formed by the closed flytrap allow DmKT1 and DmHAK5 to acquire prey-derived K(+), reducing its concentration from millimolar levels down to trace levels.
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