Allelopathic Potential of Aqueous Extracts of Various Parts of Plumbago zeylanica L. on Germination and Seedling Growth of Andrographis paniculata Nees.

Abstract

A b s t r a c t A r t i c l e I n f oThe present study was conducted to investigate the allelopathic potential of Plumbago zyelanica L. which showed inhibitory effects on seed germination, root length and shoot length of medicinal plant Andrographis paniculata Nees. Leaf, stem and root aqueous extracts of P. zeylanica at 5%, 10%, 15%, 20% and 25% concentration were applied to determine their effect on seed germination and seedling growth of A. paniculata under laboratory conditions. Results notable that seed germination, root length, shoot length, fresh weight and dry weight of A. paniculata were significantly decreased by leaf, stem and root extracts compared with control treatments. Roots were large affected than shoots. Root extracts was more reduced than leaf and stem extract. These outcomes revealed that the inhibitory and stimulatory effect potentialities may be due to the presence of these allelochemicals like alkaloids, tannins, phenols, terpenoids and steroids etc. in the aqueous leaf, stem and root extracts of P. zeylanica from the present investigation.

Allelopathic Potential of Etlingera coccinea (B.) Sakai & Nagam on Seed Germination and Growth of Mung Bean and Siam Weed

“…Pot experiment was conducted as described by Alagesaboopathi [3]. The seeds of C. odorata were grown in 4 pots filled with soil to allow it for germination and growth.…”

“…These chemical compounds may inhibit or promote the growth of adjacent plants, weeds and animals, when released to the environment. Many studies on the screening and evaluation of allelopathic potential of plants have been conducted [3,4].…”