ALLELOPATHIC INFLUENCE OF TRIANTHIMA PORTULACASTRUM L. ON GROWTH AND DEVELOPMENTAL RESPONSES OF SESAME (SESAMUM INDICUM L.)

Prabhakaran J,Kavitha D

doi:10.26524/krj222

Abstract

An experiment was conducted in order to determine the allelopathic effects of the aqueous extract of Trianthima portulacastrum L.on the seed germination, seedling growth and chlorophyll content ofsesame (Sesamum indicum L.). Greenhouse experiment was carried out as RCBD (Randomized complete block design)with four replications. Treatments included 0, 1, 2, 3 and 4% (W/W) residues of whole plant of T.portulacastrum with normal field soil. Results showed that the low concentrations of T.portulacastrum had no significant effect on the germination percentage, seedling length, dry weight, total chlorophyll contents at lower concentration(1%) of weed residues. However, treatments with higher concentrations had negative effects on germination, growth and seedling dry weight of sesame.

Highlights

Allelopathy is a phenomenon of direct or indirect, beneficial or adverse effects of a plant on its own or another plant through the release of chemicals into the environment
The aim of this research was to evaluate the possible effects of the weed species, Trianthima portulacastrum L. on the seed germination characteristics, seedling growth and chlorophyll content of sesame (Sesamum indicum L.)
The green house studies showed that the weed residues of T. portulacastrum significantly reduced germination of sesameover the control and the magnitude of reduction differed depending upon the concentration of the weed residues employed (Fig. 2-5)

Summary

Introduction

Allelopathy is a phenomenon of direct or indirect, beneficial or adverse effects of a plant on its own or another plant through the release of chemicals into the environment. It affects plant distribution, community formation, intercrop evolution and biodiversity conservation and is arousing further international interest (Zhang et al, 2004). It is native to areas of several continents, including Africa and North and South America, and present as an introduced species in many other areas. It grows in a wide variety of habitat types and it can take hold in disturbed areas and cultivated land as a weed

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