Involvement of calcium in the in vitro sensitivity change of the plasma membrane Hplus ATPase to indole-3-acetic acid

• Autorzy: Bellamine J , Greppin H.
• Języki publikacji: EN

Abstrakty

EN

The proton pumping activity of phase-partitioning purified plasma membrane fraction from spinach leaves was tested in vitro in the presence of exogenous indole-3-acetic acid. The sensitivity of the H+ pumping activity to the auxin was changed after flowering induction. We investigated the effect of whole spinach leaf treatments with substances affecting the phosphatidylinositol diphosphate transduction pathway on the in vitro sensitivity modification by photoperiodic induction. A role of calcium ions was supported by studies on leaves treated with a specific Ca²⁺ chelator (EGTA), a synthetic Ca²⁺ ionophore (A23187) or with calcium channel blokers (verapamil, lanthan chloride). An experiment using the transduction pathway inhibitor, lithium chloride, indicated that the intracellular concentration of Ca²⁺ was increased by inositol triphosphate.

Słowa kluczowe

EN

plasma membrane; indole-3-acetic acid; calcium; auxin; Spinacia oleracea; ATPase; spinach; plasmalemma; in vitro

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 1997
• Tom: 19
• Numer: 1
• Opis fizyczny: p.17-22,fig.

Twórcy

autor

Bellamine J

• Laboratory of Plant Physiology and Biochemistry, 3 place de l'Universite, CH-1211 Geneve 4, Switzerland

autor

Greppin H.

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