Assessment of allelopathic potential of Cassia sophera L. on seedling growth and physiological basis of weed plants

  • Aasifa Gulzar
  • MB Siddiqui
  • Shazia Bi


Allelopathy is described as both beneficial and deleterious biochemical interaction between plant and weeds, and/or plant and microorganisms through the production of chemical compounds that escape into the environment and subsequently influence the growth and development of neighbouring plants. The present laboratory experimental study was conducted to evaluate the allelopathic effect of Cassia sophera (L.) on three weed plants (Chenopodium album L., Melilotus alba Medik and Nicotiana plumbaginifolia Viv.). Aqueous extracts of Cassia at 0.5, 1.0, 2.0 and 4.0% concentrations were applied to determine their effect on seed germination, seedling growth, dry biomass, leaf area, relative water content, chlorophyll and protein content of test plants under laboratory conditions. The aqueous extracts had a significant retardatory effect on seed germination of test plants which varied among species and also with the different concentrations used. Root length and shoot length of weed species decreased significantly when plants were exposed to increasing aqueous concentration (0.5, 1, 2 and 4%). The noticed reduction in dry biomass, leaf area and relative water content were also significant. Physiological parameters (total chlorophyll content and protein content) in relation to three test species (M. alba, C. album and N. plumbaginifolia) were significantly reduced with the different concentrations of aqueous extract used. From this we can predict that cassia might possess allelochemicals that causes the suppressive ability.

Keywords: Allelopathy, aqueous extract, Melilotus alba, Chenopodium alba and Nicotiana plumbaginifolia

African Journal of Biotechnology, Vol. 13(9), pp. 1037-1046, 26 February, 2014

Author Biographies

Aasifa Gulzar
Department of Botany, A.M.U, Aligarh, U.P, 202002, India
MB Siddiqui
Department of Botany, A.M.U, Aligarh, U.P, 202002, India
Shazia Bi
Department of Botany, A.M.U, Aligarh, U.P, 202002, India

Journal Identifiers

eISSN: 1684-5315