Allelopathic effect of Cassia tora on seed germination and growth of mustard

Authors : Eva SARKAR, Samarendra Nath CHATTERJEE, Pampa CHAKRABORTY

Pages : 488-494

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Cassia tora L. insert ignore into journalissuearticles values(CT); is a widely growing weed in India with medicinal value and has been reported to show allelopathic potential causing biological suppression on crops. The present study was conducted to observe its suppression on Brassica campestris L. insert ignore into journalissuearticles values(mustard);. The rate of seed germination and the root length, shoot length, chlorophyll content, fresh weight insert ignore into journalissuearticles values(FW);, dry weight insert ignore into journalissuearticles values(DW);, and relative water content insert ignore into journalissuearticles values(RWC); of 10-day-old mustard seedlings were observed after treatment with aqueous extracts of the roots, leaves, and seeds of CT and compared with control sets treated with distilled water. A confirmatory chemical test was conducted to determine the presence of phenols, ketones, acids, and alcohols in the CT plant extracts. Different concentrations of the extracts showed inhibition insert ignore into journalissuearticles values(up to 100%); or deterioration in all of the parameters. Roots were more affected than shoots and the extract taken from leaves was more suppressive than that taken from other plant parts. The FW, DW, and RWC were considerably reduced upon treatment with the tested extracts. The extracts insert ignore into journalissuearticles values(>25%); also caused a reduction in the chlorophyll content. The overall results indicate the possible suppressive effect of allelochemicals insert ignore into journalissuearticles values(phenols, ketones, acids, and alcohols); present in CT on mustard. The overall results with regard to mustard plants followed the same trend of concentration-dependent inhibition in the order of leaf > seed > root.
Keywords : Key words Allelochemicals, allelopathy, Cassia tora, chlorophyll content