Abstract
The timber value of Tectona grandishas been established from decades. Teak is an exotic species cultivated along most parts of tropical regions. Anthocyanins are natural colourants which have raised a growing demand due to their extensive range of colours, innocuous and beneficial health effects. Anthocyanins belong to large group of polyphenolics - flavonoids, which are secondary metabolites synthesized by higher plants. Despite the remarkable application of anthocyaninsin food, pharmaceutical and cosmetic industries, still it is not properly exploited. In the present study, the bioactive components of Tectonagrandisyoung leaves have been evaluated using Perkin-Elmer Gas chromatography-Mass spectrometry. GC-MS analysis revealed the existence of eleven compounds. 5,9-Methanobenzocycloocten1(2H)-one,3,4,5,6,7,8,9,10-octahydro-5,10-dihydroxy-3,3,7,7,9-pentamethyl(76.02%) and 1-naphthalene carboxylic acid, 5-[2-(3-furanyl)ethyl]decahydro-1,4a-dimethyl-6-methylene-[1R-(1.alpha.,4a.)] (13.95%). Other compounds present in minor quantities were ledol(0.92%), 3-Buten-2-one,4-(2,6,6-trimethyl-1- cyclohexen-1-yl)orionone(0.49%),9,12,15 Octadecatrienoic acid, methyl ester, (Z,Z,Z)- or Linolenic acid methyl ester (0.82%), Phytol(0.69%), Cedran-diol, 8S,14- (0.60%), Lupeol (0.71%), 3-Methoxymethyl2,5,5,8a-tetramethyl-6,7,8a-tetrahydro-5H-chromene (3.45%) and Retinol(1.27%). This is the first report of identification of active constituents from the young leaves of Tectonagrandis
Highlights
Teak belongs to Verbenaceaeis known for the valuable timber and cultivated around the world
Teak is an exotic species dominated along the tropical regions like India and other South-East Asian countries.Tectona grandis is found adapted to variety of habitats and climatic conditions from arid areas with only 500 mm of rain per year to moist forests with up to 5,000 mm
The anthocyanin was quantified according to the method of Sutharut and Sudarat, (2012). 35.2 mg/g anthocyanin was present in the fresh tender leaf tissue
Summary
Teak belongs to Verbenaceaeis known for the valuable timber and cultivated around the world. Leaves of the teak are used for making Pellakaigatti, where batter is poured into the teak leaf and is steamed.This type of usage is found in the coastal district of Udupi in the Tulunadu region in South India. Apart from the antioxidant property they possess anti-inflammatory, cardioprotective, hepatoprotective and anticancerous role. They are found to be a perfect alternative of the synthetic food colourant and dye(Sujata and Bhaskar 2013). Anthocyanins are water-soluble vacuolar pigments that may appear as red, purple, or blue depending on pH.
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