J Integr Plant Biol. ›› 1998, Vol. 40 ›› Issue (5): -.

• Research Articles •    

Studies of Signal Transduction of Salicylic Acid in Cucumber Cells

LI Zhao-Liang, YUAN Yong-Bing, LIU Cheng-Lian and CAO Zong-Xun (Tsao T H)   

Abstract: For the first time, the signal transduction pathway of salicylic acid (SA) was investigated by using 3H-labelling, thin-layer chromatography and anion exchange column chromatography. It was found that SA stimulated the activity of membrane bound phospholipase C (PLC), accelerated the bm&down of phosphatidylinositol-4-monophosphate (PIP) and phosphatidylinositol-4,5-bisphos- phate (PIP2) and increased the levels of inositol-1,4-bisphosphate (IP2), inositol-1, 4,5-trisphos- phate (IP3) and diacylglycerol (DAG). These indicated that signal transduction of SA was probably accomplished through the mediation of phosphatidylinositide signal transduction system in cucumber ( Cucumis sativa L. ).

Key words: Salicylic acid, Signal transduction, Phosphoinositide metabolism, Cucumber

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