Ion channels in plant cell vacuoles

• Autorzy: Trebacz K.
• Języki publikacji: EN

Abstrakty

EN

Plant vacuoles occupy up to 90% of mature plant cells. They participate in turgor regulation, cell signaling, storage of ions and other compounds. Ion channels in the tonoplast play an important role in these processes. A number of ion channels have been characterized both at the electrophysiological and molecular level. The most abundant channels are cation-permeable: slow vacuolar channels, SV/TPC, vacuolar potassium channels, VK/TPK, and anion-selective channels belonging to ALMT and CLC groups. SV channels are permeable to both mono- and divalent cations and activate at high cytoplasmic Ca2+ concentrations [Ca2+]cyt (10–100 µM). They rectify from the cytoplasm to the vacuole. SV channels are regulated by phosphorylation, 14-3-3 proteins, redox potential, and heavy metals. VK channels are K+ -selective, operate at physiological [Ca2+]cyt, and are outwardly rectifying. VMAL channels transport mainly malate from the cytosol to the vacuole. CLC-type proteins exist as channels or NO3 -/H+ transporters.

• Wydawca: -
• Czasopismo: Acta Neurobiologiae Experimentalis
• Rocznik: 2014
• Tom: 74
• Numer: 3
• Opis fizyczny: p.335

Twórcy

autor

Trebacz K.

• Department of Biophysics, Maria Curie-Skłodowska University, Lublin, Poland