[Effect of growth regulators on proton transport through cytoplasmic membrane of potato tuber cells].
Effects of the growth regulators epibrassinolide-694 (EB), gibberellic acid (GA), and abscisic acid (ABA) on the ATP-dependent translocation of H+ through the membranes of plasma membrane vesicles of potato (Solanum tuberosum L.) tuber cells were studied. The ATP-dependent accumulation of H+ in the plasma membrane vesicles from dormant tubers was inhibited by EB and ABA and stimulated by GA. After the break of dormancy, the stimulatory effect of GA increased, the inhibitory effect of ABA decreased, and EB stimulated the accumulation of H+ in the vesicles. The data suggest that the plasma membrane H+ ATPase is a target of phytohormones that regulate the dormancy of potato tubers.
Ladyzhenskaia
E P
EP
Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 117071 Russia.
Korableva
N P
NP
D000040:Abscisic Acid / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D003593:Cytoplasm / Q000187:drug effects*; D005875:Gibberellins / Q000494:pharmacology; D017136:Ion Transport; D010937:Plant Growth Regulators / Q000494:pharmacology*; D011522:Protons; D011198:Solanum tuberosum / Q000166:cytology / Q000378:metabolism*
D005875:Gibberellins; D010937:Plant Growth Regulators; D011522:Protons; D000040:Abscisic Acid; D000255:Adenosine Triphosphate; C007842:gibberellic acid
Vliianie reguliatorov rosta na transport proton cherez tsitoplazmaticheskuiu membranu kletok klubneĭ kartofelia.