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Isolation and characterization of phenolics and other constituents from Albizia-lebbek and their allelopathic activity

KrishiKosh

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Title Isolation and characterization of phenolics and other constituents from Albizia-lebbek and their allelopathic activity
 
Creator Loura, Pardeep
 
Contributor Rajbir Singh
 
Subject Aromatic compounds, Extraction, Alcohols, organic acid salts, Organic compounds, Sowing, Fractionation, Acidity, Vegetative propagation, Concentrates
 
Description Plant material viz. leaves, bark, stem, seeds and root were collected from CCS HAU, Hisar. These were extracted with methanol. Extractives were divided into two parts. One part was subjected to column chromatography over silica gel (60-120 mesh) to afford twenty nine compounds. Six compounds namely, 20-methoxylupan-3-one, untriacontanol, β-sitosterol, friedel-3-ene, lupa-5,20 (29)-dien-3-one and 2α, 19α-dihydroxy-3-oxo-12-ursen-28- oic ursen-28-oic acid were isolated and characterized from stem. Five compounds namely, 20- hydroxylupan-3-one, dihydrolanosterol, β-sitosterol, n-undecano-4 -propoxy-phenone and stigmasterol were isolatedfrom bark of Albizia-lebbek. Similarly six compounds were isolated from seeds, seven compounds from leaves and five compounds from root of Albizia lebbek. Methanolic extract and four fractions (hexane, ethyl acetate, chloroform and acetone) of leaves, bark, seeds, stem and root of Albizia-lebbek were tested for allelopathic activity against the germination of seeds of radish 100, 500, 1000, 1500 and 2000 ppm concentrations. In all the extract/fractions of Albizia-lebbek were tested, the chloroform fraction of stem showed maximum allelopathic effect (40%) at 2000 ppm concentration followed by chloroform fraction of leaves which showed 37.5% inhibition. Methanolic extract was found least allelopathic against radish seed germination.
 
Date 2016-02-29T10:18:57Z
2016-02-29T10:18:57Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64488
 
Language en
 
Format application/pdf
 
Publisher CCSHAU