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Hydrophobic metabolites from Rhododendron formosanum and their allelopathic activities.
Nat Prod Commun. 2009 Sep; 4(9):1189-92.NP

Abstract

Eighteen components were isolated from the methanolic extract of leaves of Rhododendron formosanum Hemsl. (Ericaceae), an endemic species in Taiwan, and evaluated for their allelopathic properties. Of the isolated compounds, 3beta-friedelinol, 5,6beta-epoxy-5beta-stigmastan-3beta-ol, 5,6alpha-epoxy-5alpha-stigmastan-3beta-ol, lupeol and ursolic acid revealed inhibitory effects at 10(-4) M or above, whereas alpha-tocopherol, friedelin and beta-amyrin acetate exhibited stimulatory effects on the radicle growth of the test plants at the same concentration or above. However, squalene and alpha-amyrin showed either a stimulatory or inhibitory effect. The remaining four components, coumarin, beta-sitosterol, adian-5-en-3beta-ol and 3beta-acetoxyurs-12-en-28-al, were not significantly effective in the present bioassay, but have been reported as allelopathic agents elsewhere.

Authors+Show Affiliations

Chou SC
Research Center for Biodiversity and Graduate Institute of Ecology and Evolutionary Biology, China Medical University, Taichung 40402, Taiwan. choumasa@mail.cmu.edu.tw
Krishna V
No affiliation info available
Chou CH
No affiliation info available

MeSH

BrassicaChromatography, GelNuclear Magnetic Resonance, BiomolecularPlant ExtractsPlant Growth RegulatorsPlant LeavesRhododendronTriterpenes

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19831026

Citation

Chou, Shen-Chieh, et al. "Hydrophobic Metabolites From Rhododendron Formosanum and Their Allelopathic Activities." Natural Product Communications, vol. 4, no. 9, 2009, pp. 1189-92.
Chou SC, Krishna V, Chou CH. Hydrophobic metabolites from Rhododendron formosanum and their allelopathic activities. Nat Prod Commun. 2009;4(9):1189-92.
Chou, S. C., Krishna, V., & Chou, C. H. (2009). Hydrophobic metabolites from Rhododendron formosanum and their allelopathic activities. Natural Product Communications, 4(9), 1189-92.
Chou SC, Krishna V, Chou CH. Hydrophobic Metabolites From Rhododendron Formosanum and Their Allelopathic Activities. Nat Prod Commun. 2009;4(9):1189-92. PubMed PMID: 19831026.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hydrophobic metabolites from Rhododendron formosanum and their allelopathic activities. AU - Chou,Shen-Chieh, AU - Krishna,Vivek, AU - Chou,Chang-Hung, PY - 2009/10/17/entrez PY - 2009/10/17/pubmed PY - 2009/12/16/medline SP - 1189 EP - 92 JF - Natural product communications JO - Nat Prod Commun VL - 4 IS - 9 N2 - Eighteen components were isolated from the methanolic extract of leaves of Rhododendron formosanum Hemsl. (Ericaceae), an endemic species in Taiwan, and evaluated for their allelopathic properties. Of the isolated compounds, 3beta-friedelinol, 5,6beta-epoxy-5beta-stigmastan-3beta-ol, 5,6alpha-epoxy-5alpha-stigmastan-3beta-ol, lupeol and ursolic acid revealed inhibitory effects at 10(-4) M or above, whereas alpha-tocopherol, friedelin and beta-amyrin acetate exhibited stimulatory effects on the radicle growth of the test plants at the same concentration or above. However, squalene and alpha-amyrin showed either a stimulatory or inhibitory effect. The remaining four components, coumarin, beta-sitosterol, adian-5-en-3beta-ol and 3beta-acetoxyurs-12-en-28-al, were not significantly effective in the present bioassay, but have been reported as allelopathic agents elsewhere. SN - 1934-578X UR - https://www.unboundmedicine.com/medline/citation/19831026/Hydrophobic_metabolites_from_Rhododendron_formosanum_and_their_allelopathic_activities_ DB - PRIME DP - Unbound Medicine ER -