[The high diversity and regulation of plant water channels].
Membrane intrinsic proteins (MIPs) are a diverse class of integral membrane proteins that mediate the bi-directional flux of water (aquaporins), uncharged small solutes such as glycerol and/or gases across cellular membranes. The past year has brought significant advances in the characterization in plants of a large class this of water channel. MIPs have been identified in many single- and multi- cellular organisms. Aquaporins play important role in plant development and their adaptation to even changing environment. At the transcriptional level aquaporins have been up- or down-regulated in response to hormones, drought, salnity and light. Recent data indicate that plant aquaporin activity might be regulated by phosphorylation and intracellular protons. Novel mechanisms of regulation by hetero-tetramer formation or through control by reactive oxygen species and osmotic or hydrostatic pressure gradients is also discussed.
Mordaka
Paweł Mateusz
PM
Zakład Genetyki, Instytut Biologii Ogólnej i Molekularnej, Wydział Biologii i Nauk o Ziemi, Uniwersytet Mikołaja Kopernika w Toruniu, Toruń.
Dabrowska
Grazyna
G
D020346:Aquaporins / Q000378:metabolism*; D001692:Biological Transport / Q000502:physiology; D002118:Calcium / Q000378:metabolism; D002451:Cell Compartmentation / Q000502:physiology; D002462:Cell Membrane / Q000378:metabolism; D002463:Cell Membrane Permeability / Q000502:physiology; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D006863:Hydrogen-Ion Concentration; D007425:Intracellular Membranes / Q000378:metabolism; D053858:Metabolic Networks and Pathways; D010766:Phosphorylation; D018521:Plant Physiological Phenomena; D014882:Water-Electrolyte Balance / Q000502:physiology*
D020346:Aquaporins; D002118:Calcium