Journal
JOURNAL OF CHEMICAL ECOLOGY
Volume 27, Issue 11, Pages 2263-2273Publisher
SPRINGER
DOI: 10.1023/A:1012283005014
Keywords
Flourensia cernua; fractionation; activity; fungi; cyanobacteria; algae; termite; Colletotrichum; Oscillatoria; Selenastrum; Reticulitermes
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The chemical components of tarbush (Flourensia cernua) leaves were fractionated by extracting successively with hexanes, diethyl ether, and ethanol. Volatile profiles of each fraction were identified by using GC-MS. The hexanes fraction contained mostly monoterpenoids, while the ethanol fraction volatiles were primarily sesquiterpenoids. Crude fractions were tested for activity against fungi, algae, and termites. Application of as little as I jug of the essential oil from the hexanes fraction was sufficient to provide visible antifungal activity in bioautography assays. The diethyl ether fraction showed selective activity against the cyanobacterium responsible for the 2-methylisoborneol-induced off-flavor sometimes associated with catfish farming operations. All three fractions exhibited a high degree of antitermite activity.
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