Topic
Phytoalexin
About: Phytoalexin is a research topic. Over the lifetime, 1161 publications have been published within this topic receiving 63405 citations. The topic is also known as: phytoalexins.
Papers published on a yearly basis
Papers
More filters
•
28 May 1993
TL;DR: An agent for inducing a phytoalexin comprising a xyloglucan-oligosaccharide as an active ingredient thereof and a method for inducing the phytto-alaxin in a plant body comprising an application of a Xyloglucaan-OLIGOSACcharide to the plant is described in this article.
Abstract: An agent for inducing a phytoalexin comprising a xyloglucan-oligosaccharide as an active ingredient thereof and a method for inducing a phytoalexin in a plant body comprising an application of a xyloglucan-oligosaccharide to the plant. The present invention is useful for promoting growth of a plant and maintaining freshness of a plant while a crop has been grown, or a vegetable or a fruit has been transported and/or stored.
14 citations
••
TL;DR: It is suggested that Ca2+ acts as a second messenger in the regulation of phytoalexin synthesis in cultured onion cells.
Abstract: Treatment of Allium cepa L. cellsuspension cultures with a biotic elicitor derived from the fungus Botrytis cinerea, resulted in phytoalexin synthesis. Two phytoalexins, 5-octylcyclopenta-1,3-dione and 5-hexyl-cyclopenta-1,3-dione, were accumulated in cultured onion cells. Removal of extracellular Ca(2+) by the calcium chelator ethylene glycol bis(b-aminoethyl ether) N,N'-tetraacetic acid abolished the elicitor-mediated phytoalexin synthesis. The calcium channel blockers, verapamil and 8-N,N-(dimethylamino)octyl-3,4,5-trimethoxybenzoate caused similar effects, whereas the addition of the Ca(2+) ionophore A23187 enhanced the accumulation of phytoalexins in the absence of the elicitor. Increase in the cytoplasmic Ca(2+) concentration in elicitor-treated onion cells was observed as monitored by the fluorescent calcium indicator indo-1. These observations suggest that Ca(2+) acts as a second messenger in the regulation of phytoalexin synthesis in cultured onion cells.
14 citations
••
TL;DR: It was found that arachidonic acid could elicit a response in protoplasts that was visually identical to the response caused by hyphal wall components, but other unsaturated fatty acids not able to elicit phytoalexins in tubers were also effective on protoplast.
14 citations
••
TL;DR: Interestingly, an accumulation of galacturonate and gentiobiose was observed in the oligogalacturonide- and laminarin-treated cells, respectively, suggesting that both elicitors are rapidly hydrolyzed in grapevine cell suspension cultures.
14 citations
••
TL;DR: While HMGR levels are extremely low in untreated tissues, the activities of the two kinases are ralatively high, suggesting that they do not serve as control points for the synthesis of terpenoids.
14 citations