ArticleProceedings of the National Academy of Sciences of the United States of America2000
ABA activates multiple Ca(2+) fluxes in stomatal guard cells, triggering vacuolar K(+)(Rb(+)) release.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
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Who cites it
57 citing papers in PubMed, 160 citations in OpenAlex.
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- A charged existence: A century of transmembrane ion transport in plants.Plant physiology · 2024Review
- Abscisic acid-mediated cytosolic CaJournal of Zhejiang University. Science. B · 2023Article
- Spatial regulation of plant hormone action.Journal of experimental botany · 2023Review
- Rice DST transcription factor negatively regulates heat tolerance through ROS-mediated stomatal movement and heat-responsive gene expression.Frontiers in plant science · 2023Article
- Green Tea Catechins, (-)-Catechin Gallate, and (-)-Gallocatechin Gallate are Potent Inhibitors of ABA-Induced Stomatal Closure.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
- Knockdown ofFrontiers in plant science · 2022Article
- Distinct Roles for KASH Proteins SINE1 and SINE2 in Guard Cell Actin Reorganization, Calcium Oscillations, and Vacuolar Remodeling.Frontiers in plant science · 2022Article
- Physio-anatomical modifications and elemental allocation pattern in Acanthus ilicifolius L. subjected to zinc stress.PloS one · 2022Article
- ZEITLUPE Promotes ABA-Induced Stomatal Closure in Arabidopsis andFrontiers in plant science · 2022Article
- Structural and Functional Insights into the Role of Guard Cell Ion Channels in Abiotic Stress-Induced Stomatal Closure.Plants (Basel, Switzerland) · 2021Review
- A role for calcium-dependent protein kinases in differential COThe New phytologist · 2021Article
- Predicting the unexpected in stomatal gas exchange: not just an open-and-shut case.Biochemical Society transactions · 2020Review
- MgInternational journal of molecular sciences · 2020Article
- Expression, Subcellular Localization, and Interactions of CPK Family Genes in Maize.International journal of molecular sciences · 2019Article
- Guard Cell Membrane Anion Transport Systems and Their Regulatory Components: An Elaborate Mechanism Controlling Stress-Induced Stomatal Closure.Plants (Basel, Switzerland) · 2019Review
- Reproductive Physiology of Halophytes: Current Standing.Frontiers in plant science · 2018Review
- ABA-Induced Stomatal Closure Involves ALMT4, a Phosphorylation-Dependent Vacuolar Anion Channel of Arabidopsis.The Plant cell · 2017Article
- Integrated mRNA and miRNA transcriptome reveal a cross-talk between developing response and hormone signaling for the seed kernels of Siberian apricot.Scientific reports · 2016Article
- An Optimal Frequency in Ca2+ Oscillations for Stomatal Closure Is an Emergent Property of Ion Transport in Guard Cells.Plant physiology · 2016Article
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Authors and funding
1 author at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mechanisms by which abscisic acid (ABA) activates the release of K(+)(Rb(+)) from the vacuole of stomatal guard cells, a process essential for ABA-induced stomatal closure, have been investigated by tracer flux measurements. The form and timing of the ABA-induced efflux transient could be manipulated by treatments that alter three potential Ca(2+) fluxes into the cytoplasm, the influx from the outside and two pathways of internal release, those dependent on phospholipase C (inhibited by ) and cyclic ADP-ribose (inhibited by nicotinamide). Ba(2+), acting as a competitive inhibitor of Ca(2+) influx but also as an inhibitor of internal release, was an effective inhibitor of the transient. The results suggest that a threshold level of cytoplasmic Ca(2+) is required for the initiation of the minimal efflux transient after a lag period and with a low rate of rise. As conditions improve for the generation of an efflux transient (higher ABA or reduced Ba(2+)), a second threshold is crossed, generating a transient with zero lag and rapid rate of rise. This may reflect different Ca(2+) levels required for activation of different tonoplast K(+) channels. In this state, at high ABA, the transient is inhibited by removal of external Ca(2+), suggesting Ca(2+) influx makes a major contribution to increase in cytoplasmic Ca(2+). By contrast, at low ABA, the transient is not inhibited by removal of external Ca(2+) but is sensitive to either or nicotinamide, suggesting internal release makes the major contribution, involving both pathways. ABA appears to activate all three processes, and their relative importance depends on conditions.
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