Title: XIX. THE ENDOGENOUS ELICITOR, A FRAGMENT OF A PLANT CELL WALL POLYSACCHARIDE THAT ELICITS PHYTOALEXIN ACCUMULATION IN SOYBEANS
Abstract:An elicitor of phytoalexin accumulation (endogenous elicitor) is solubilized from purified cell wails of soybean (Glycine max IL.I Merr., cv. Wayne) by extracting the wails with hot water or by subjec...An elicitor of phytoalexin accumulation (endogenous elicitor) is solubilized from purified cell wails of soybean (Glycine max IL.I Merr., cv. Wayne) by extracting the wails with hot water or by subjecting the walls to partial acid hydrolysis. The endogenous elicitor obtained from soybean cell walls binds to an anion exchange resin. The elicitor-active material released from the resin contains oligosaccharides rich in galacturonic acid; small amounts of rhamnose and xylose are also present. The preponderance of galacturonic acid in the elicitor-active fragments suggests that the elicitor is, in fact, a fragment of a pectic polysaccharide. This possibility is supported by the observation that treatment of the wall fragments with a highly purified endopolygalacturonase destroys their ability to elicit phytoalexin accumulation. This observation, together with other evidence presented in this paper, suggests that galacturonic acid is an essential constituent of the elicitor-active wall fragments. Endogenous elicitors were also solubilized by partial hydrolysis from cell walls of suspension-cultured tobacco, sycamore, and wheat cells.Read More
Publication Year: 1981
Publication Date: 1981-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 47
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