title: [PLASMALEMMAL ION TRANSPORT IN POLLEN TUBES IS REGULATED BY HYDROGEN PEROXIDE].
abstract: Pollen tube growth is a key step in the life cycle of seed plants, which defines the success of sexual reproduction. One of the most important contributions to this process is made by ion transport through plasmalemma, which is tightly coordinated in time and space. Different classes of signaling molecules are involved in the regulation of transmembrane ion transport including reactive oxygen species as it has been recently demonstrated. Here, using subprotoplasts isolated from pollen tubes, we have demonstrated a connection between hydrogen peroxide, on one side, and two groups of targets on the plasma membrane, on the other side: nifedipine-sensitive Ca(2+)-permeable channels and transport systems controlling membrane potential. H2O2 interaction with these targets causes the increase in cytoplasmic Ca2+ concentration and plasmalemma hyperpolarization. One of the consequences of target modification was acceleration of cell wall regeneration.
authors: N M
authors: NM
authors: Maksimov
authors: M A
authors: MA
authors: Breygina
authors: I P
authors: IP
authors: Yermakov
mesh_terms: D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D002473:Cell Wall / Q000187:drug effects / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism* / Q000494:pharmacology; D017136:Ion Transport / Q000235:genetics*; D053205:Pollen Tube / Q000254:growth & development* / Q000378:metabolism; D011523:Protoplasts / Q000187:drug effects / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism*; D014026:Nicotiana / Q000235:genetics / Q000254:growth & development / Q000378:metabolism
chemical_list: D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide