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United States Department of Agriculture

Agricultural Research Service

Research Project: MOLECULAR AND GENETIC APPROACHES TO SUPPRESSING FUNGAL PATHOGENS AND MYCOTOXIN CONTAMINATION

Location: Foodborne Toxin Detection and Prevention

Title: Chemodiversity Studies on Exudate Flavonoids of Cleomaceae species (Brasicales)

Authors
item Wollenweber, Eckhard - TECH UNIV DARMSTADT GER
item Valent-Vetschera, Karin - UNIV VIENNA, AUSTRIA
item Roitman, James - RETIRED ARS, WRRC

Submitted to: Natural Product Communications
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 28, 2008
Publication Date: October 30, 2007
Citation: Wollenweber, E., Valent-Vetschera, K.M., Roitman, J.N. 2007. Chemodiversity Studies on Exudate Flavonoids of Cleomaceae species (Brasicales). Natural Product Communications.2:997-1002.

Interpretive Summary: Seven species of the genus Cleome were examined to determine the makeup of the fatty waxy deposit that appears on the outer surfaces of the leaves. Rinsing the leaves with an organic solvent allowed this external, fatty material to be removed and subsequently separated into individual substances that were then identified by magnetic resonance and ultraviolet spectroscopy. A number of yellow flavone pigments were isolated including two new ones, one from Cleome felina and another from Cleome viscosa. Neither of these materials had been described previously. Flavone pigments provide protection to the plant from ultraviolet rays and also protect from attacks by insects and microbes.

Technical Abstract: Seven species of the genus Cleome were examined to determine the makeup of the fatty waxy deposit that appears on the outer surfaces of the leaves. Rinsing the leaves with an organic solvent allowed this external, fatty material to be removed and subsequently separated into individual substances that were then identified by magnetic resonance and ultraviolet spectroscopy. A number of yellow flavone pigments were isolated including two new ones, one from Cleome felina and another from Cleome viscosa. Neither of these materials had been described previously. Flavone pigments provide protection to the plant from ultraviolet rays and also protect from attacks by insects and microbes.

Last Modified: 7/24/2014
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