Malate transport by the vacuolar AtALMT6 channel in guard cells is subject to multiple regulation

• Published in: The Plant journal : for cell and molecular biology Vol. 67; no. 2; pp. 247 - 257
• Main Authors: Meyer, Stefan, Scholz‐Starke, Joachim, De Angeli, Alexis, Kovermann, Peter, Burla, Bo, Gambale, Franco, Martinoia, Enrico
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.07.2011; Blackwell
• Subjects: Aluminum; anion exchange; Anions; Arabidopsis; Arabidopsis - cytology; Arabidopsis - genetics; Arabidopsis - metabolism; Arabidopsis Proteins; Arabidopsis Proteins - genetics; Arabidopsis Proteins - metabolism; Arabidopsis thaliana; AtALMT6; Biochemistry; Biological and medical sciences; Biological Transport; calcium; Calcium - metabolism; calcium‐activation; Cellular biology; cytology; flowers; Flowers & plants; Fundamental and applied biological sciences. Psychology; Gas exchange; Gene expression; Gene Knockout Techniques; genetics; guard cells; Hydrogen-Ion Concentration; ion transport; knockout mutants; malate transport; malates; Malates - metabolism; membrane potential; Membrane Potentials; metabolism; Mutagenesis, Insertional; nutrient transport; Organic Anion Transporters; Organic Anion Transporters - genetics; Organic Anion Transporters - metabolism; Patch-Clamp Techniques; Plant biology; Plant physiology and development; Plant Stomata; Plant Stomata - metabolism; potassium; Respiration; stem cells; stomatal movement; tonoplast; transporters; turgor; vacuoles; Vacuoles - metabolism; Tonoplast; Multiple; guard cells; Calcium; Activation; Guard cell; AtALMT6; Arabidopsis thaliana; calcium-activation; Regulation(control); Cruciferae; Dicotyledones; Angiospermae; Spermatophyta; malate transport

Summary Gas exchange in plants is controlled by guard cells, specialized cells acting as turgor pressure‐driven valves. Malate is one of the major anions accumulated inside the vacuole during stomatal opening counteracting the positive charge of potassium. AtALMT6, a member of the aluminum‐activated...