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.
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TL;DR: Different patterns of germ-tube growth by Botrytis were recorded in the presence of wyerone acid or the methylated phytoalexins wyer one and wyerOne epoxide despite germ-tubes reaching the same lengths after 16 h incubation despite these differences being associated with the relationships between growth and metabolism of the acid and other phy toalexin.
Abstract: Different patterns of germ-tube growth by Botrytis were recorded in the presence of wyerone acid or the methylated phytoalexins wyerone and wyerone epoxide despite germ-tubes reaching the same lengths after 16 h incubation. These differences were associated with the relationships between growth and metabolism of the acid and other phytoalexins. Rapid detoxification of wyerone and wyerone epoxide preceded the onset of germ-tube growth whereas growth has previously been shown to occur without comparable metabolism of wyerone acid. The more rapid metabolism of wyerone and wyerone epoxide was also demonstrated when B. cinerea and B. fabae were exposed to mixtures of the phytoalexins, the acid remaining in cultures when the other phytoalexins had been completely metabolised. In time course experiments the onset of rapid growth by B. fabae occurred when wyerone and the epoxide were present in bathing solutions at levels respectively 1 · 6 and 4 · 3 times those allowing rapid growth of B. cinerea , suggesting that phytoalexin metabolism was not the sole determinant of the differential senstivity of the two species to fungistatic concentrations of the inhibitors.
8 citations
TL;DR: Investigation of time courses of multiplication of an incompatible strain of Xanthomonas campestris pv.
8 citations
TL;DR: Roots of intact soybean plants released 50–60% of stress metabolites synthesized into the medium after induction with an abiotic elicitor, or following infection with zoospores of Phytophthora megasperma f.
8 citations
TL;DR: In this paper, the first synthesis of 1-(β-D-glucopyranosyl)brassinin was achieved by linear approach, using the 1-(2,3,4,6,6-tetra- O -acetyl-β-d-glocopyranoyl)indole-3-carbaldehyde as a starting compound.
Abstract: The first synthesis of 1-(β-D-glucopyranosyl)brassinin, 1-(β-D-glucopyranosyl)brassenin A, 1-(β-D-glucopyranosyl)brassenin B and 9-(β-D-glucopyranosyl)cyclobrassinin, nucleoside analogs derived from indole phytoalexins, was achieved by linear approach, using the 1-(2,3,4,6-tetra- O -acetyl-β-D-glucopyranosyl)indole-3-carbaldehyde as a starting compound. Antiproliferative and antimicrobial activity of synthesized compounds against murine leukaemia tumor cell line L1210 and selected bacteria and fungi was examined and compared with the corresponding phytoalexin aglycons.
8 citations
TL;DR: A direct means of obtaining, in clinically beneficial doses, the tremendous health benefits that have been documented for phytoalexins in vitro and in animal studies, but that have so far remained elusive in clinical studies are proposed.
8 citations