Allelopathic impact of different parts of Nicotiana plumbaginifolia Viv. and Amaranthus viridis L.on seed germination of a weed and crops.
Uzma Parveen*, MO Shadab and M. Badruzzaman Siddiqui
*Department of Botany, Aligarh Muslim University, Aligarh-20 2002 (India) Tel/Fax No - (+91)75127 02016 Corresponding author: uzma.amu79@gmail.com zaman.amu@gmail.com
ABSTRACT
Following study was managed to carefully examine the phytotoxic outcome of various segments of Nicotiana plumbaginifolia Viv. and Amaranthus viridis L. be that leaf, stem and root on seed germination and seedling growth of crops like Solanum melongena L., Daucus carota subsps. sativus and weed, Eclipta alba L. Both Nicotiana plumbaginifolia Viv. and Amaranthus viridis L. suppressed the seedling growth in weed and crops so, aqueous extracts were prepared. Sapling germination (shoot length, root length and dry biomass) of both weeds, crops reduced at different concentrations (4%, 2%, 1%, and 0.5%) of aqueous extracts of root, stem and leaf in contrary to compared to control and the concentration dependent reduction was seen. The leaf aqueous extract (LAE) proved to be more harmful in case of Amaranthus as compared to extracts of stem/root while stem aqueous extract SAE) in Nicotiana. The results of this study suggest that Nicotiana plumbaginifolia Viv. and Amaranthus viridis L. might possess phytochemicals which are capable to restrain the growth of weed (Eclipta alba L.) and crop (Daucus carota subsps. sativus and Solanum melongena L.). Since, contribution of leaf in Amaranthus and stem in Nicotiana accounts heavy biomass for plant proportionately more towards phytotoxicity and has potential to be applied as natural herbicide in agro-ecosystems thus, creating green biosphere.