ArticlePlant physiology1999
A steep dependence of inward-rectifying potassium channels on cytosolic free calcium concentration increase evoked by hyperpolarization in guard cells
Article in Plant physiology, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.
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Who cites it
58 citing papers in PubMed, 155 citations in OpenAlex.
- Dual function of overexpressing plasma membrane HScience advances · 2024Article
- The microRNA408-plantacyanin module balances plant growth and drought resistance by regulating reactive oxygen species homeostasis in guard cells.The Plant cell · 2024Article
- A charged existence: A century of transmembrane ion transport in plants.Plant physiology · 2024Review
- Local Action of Moderate Heating and Illumination Induces Electrical Signals, Suppresses Photosynthetic Light Reactions, and Increases Drought Tolerance in Wheat Plants.Plants (Basel, Switzerland) · 2024Article
- Local Action of Increased Pressure Induces Hyperpolarization Electrical Signals and Influences Photosynthetic Light Reactions in Wheat Plants.Plants (Basel, Switzerland) · 2023Article
- Stomatal Responses of Two Drought-Tolerant Barley Varieties with Different ROS Regulation Strategies under Drought Conditions.Antioxidants (Basel, Switzerland) · 2023Article
- Green Tea Catechins, (-)-Catechin Gallate, and (-)-Gallocatechin Gallate are Potent Inhibitors of ABA-Induced Stomatal Closure.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
- The signatures of organellar calcium.Plant physiology · 2021Review
- Guard cell endomembrane CaNature plants · 2021Article
- Membrane voltage as a dynamic platform for spatiotemporal signaling, physiological, and developmental regulation.Plant physiology · 2021Article
- A role for calcium-dependent protein kinases in differential COThe New phytologist · 2021Article
- SAUR proteins and PP2C.D phosphatases regulate H+-ATPases and K+ channels to control stomatal movements.Plant physiology · 2021Article
- CIPK23 regulates blue light-dependent stomatal opening in Arabidopsis thaliana.The Plant journal : for cell and molecular biology · 2020Article
- Effect of high light on canopy-level photosynthesis and leaf mesophyll ion flux in tomato.Planta · 2020Article
- Predicting the unexpected in stomatal gas exchange: not just an open-and-shut case.Biochemical Society transactions · 2020Review
- Inhibition of light-induced stomatal opening by allyl isothiocyanate does not require guard cell cytosolic Ca2+ signaling.Journal of experimental botany · 2020Article
- A Role for Plant KASH Proteins in Regulating Stomatal Dynamics.Plant physiology · 2020Article
- Guard Cell Salicylic Acid Signaling Is Integrated into Abscisic Acid Signaling via the CaPlant physiology · 2018Article
- Preparation and applications of guard cell protoplasts from the leaf epidermis ofPlant methods · 2018Article
- Unexpected Connections between Humidity and Ion Transport Discovered Using a Model to Bridge Guard Cell-to-Leaf Scales.The Plant cell · 2017Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Inactivation of inward-rectifying K+ channels (IK,in) by a rise in cytosolic free [Ca2+] ([Ca2+]i) is a key event leading to solute loss from guard cells and stomatal closure. However, [Ca2+]i action on IK,in has never been quantified, nor are its origins well understood. We used membrane voltage to manipulate [Ca2+]i (A. Grabov and M.R. Blatt [1998] Proc Natl Acad Sci USA 95: 4778-4783) while recording IK,in under a voltage clamp and [Ca2+]i by Fura-2 fluorescence ratiophotometry. IK,in inactivation correlated positively with [Ca2+]i and indicated a Ki of 329 +/- 31 nM with cooperative binding of four Ca2+ ions per channel. IK,in was promoted by the Ca2+ channel antagonists Gd3+ and calcicludine, both of which suppressed the [Ca2+]i rise, but the [Ca2+]i rise was unaffected by the K+ channel blocker Cs+. We also found that ryanodine, an antagonist of intracellular Ca2+ channels that mediate Ca2+-induced Ca2+ release, blocked the [Ca2+]i rise, and Mn2+ quenching of Fura-2 fluorescence showed that membrane hyperpolarization triggered divalent release from intracellular stores. These and additional results point to a high signal gain in [Ca2+]i control of IK,in and to roles for discrete Ca2+ flux pathways in feedback control of the K+ channels by membrane voltage.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.