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United States Department of Agriculture

Agricultural Research Service

Title: CHARACTERIZATION OF VOLATILE CONSTITUENTS OF HAPLOPAPPUS GREENEI AND STUDIES ON THE ANTIFUNGAL ACTIVITY AGAINST PHYTOPATHOGENS)

Author
item Demirci, Betul
item Can Baser, K. Husnu
item Tabanca, Nurhayat
item Wedge, David

Submitted to: Journal of Agricultural and Food Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/5/2006
Publication Date: 3/23/2006
Citation: Demirci, B., Can Baser, K., Tabanca, N., Wedge, D.E. 2006. Characterization of volatile constituents of haplopappus greenei and studies on the antifungal activity against phytopathogens. Journal of Agricultural and Food Chemistry. 54:3146-3150.

Interpretive Summary: Essential oil of Haplopappus greenei was obtained from above ground parts and evaluated for antimalarial, antimicrobial, and antifungal activities. One hundred and four compounds were identified and carvacrol, B-pinene, trans-pinocarveol, and caryophyllene oxide were found to be the most abundant compounds. Antifungal activity was observed against the strawberry anthracnose-causing fungal plant pathogens Colletotrichum acutatum, C. fragariae and C. gloesporioides using direct bioautography assays. Carvacrol, a major component of the essential oil, demonstrated strong antifungal activity.

Technical Abstract: Essential oil of Haplopappus greenei A. Gray was obtained by hydrodistillation of aerial parts, which were subsequently analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Major components were identified as carvacrol (8.7%), B-pinene (7.6%), trans-pinocarveol (6.2%), and caryophyllene oxide (5.8%), respectively. In total, 104 components representing 84.9% of the investigated essential oil were characterized and further evaluated for antimalarial, antimicrobial, and antifungal activities. However, antifungal activity was observed against the strawberry anthracnose-causing fungal plant pathogens Colletotrichum acutatum, C. fragariae and C. gloesporioides using the direct overlay bioautography.

Last Modified: 8/24/2016
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