spirobrassinin/brassica

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Phytoalexins and polar metabolites from the oilseeds canola and rapeseed: differential metabolic responses to the biotroph Albugo candida and to abiotic stress.

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The metabolites produced in leaves of the oilseeds canola and rapeseed (Brassica rapa L.) inoculated with either different races of the biotroph Albugo candida or sprayed with CuCl(2) were determined. This investigation established consistent phytoalexin (spirobrassinin, cyclobrassinin, and

The phytoalexins from cauliflower, caulilexins A, B and C: isolation, structure determination, syntheses and antifungal activity.

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Our continuous search for phytoalexins from crucifers led us to examine phytoalexin production in florets of cauliflower (Brassica oleracea var. botrytis) under abiotic (UV light) elicitation. Four known (isalexin, S-(-)-spirobrassinin, 1-methoxybrassitin, brassicanal C) and three new (caulilexins

Structure-activity relationships of brassinin in preventing the development of carcinogen-induced mammary lesions in organ culture.

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Brassinin, a phytoalexin, is found in Chinese cabbage. Previously, we showed that brassinin significantly inhibited dimethylbenz(a)anthracene (DMBA)-induced mammary lesions in organ culture. Moreover, it was an effective inhibitor against two stage skin carcinogenesis. In the present study, we

Chemical defenses of crucifers: elicitation and metabolism of phytoalexins and indole-3-acetonitrile in brown mustard and turnip.

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The metabolism of the cruciferous phytoalexins brassinin and cyclobrassinin, and the related compounds indole-3-carboxaldehyde, glucobrassicin, and indole-3-acetaldoxime was investigated in various plant tissues of Brassica juncea and B. rapa. Metabolic studies with brassinin showed that stems of B.

Two cytochromes P450 catalyze S-heterocyclizations in cabbage phytoalexin biosynthesis.

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Phytoalexins are abundant in edible crucifers and have important biological activities, yet no dedicated gene for their biosynthesis is known. Here, we report two new cytochromes P450 from Brassica rapa (Chinese cabbage) that catalyze unprecedented S-heterocyclizations in cyclobrassinin and

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