International Journal of
Plant Physiology and Biochemistry

  • Abbreviation: Int. J. Plant Physiol. Biochem.
  • Language: English
  • ISSN: 2141-2162
  • DOI: 10.5897/IJPPB
  • Start Year: 2009
  • Published Articles: 110

Full Length Research Paper

Phytotoxicity of Parthenium hysterophorus residues towards growth of three native plant species (Acacia catechu willd, Achyranthes aspera L. and Cassia tora L.) in Himachal Pradesh, India

Kuldip S. Dogra* and Sarvesh K. Sood
Ethnobotany Laboratory, Department of Biosciences, Himachal Pradesh University Summer Hill Shimla (HP), 171005, India.
Email: [email protected]

  •  Accepted: 20 March 2012
  •  Published: 30 April 2012


Parthenium hysterophorus is a strong allelopathic plant which belongs to the family Asteraceae of flowering plants. It is a rapidly spreading invasive plant species in the state of Himachal Pradesh up to 2000 m altitude. The allelochemicals produced by P. hysterophorus showed powerful toxic effects on the growth of other plant species. These allelochemicals are either phytotoxic phenolics or flavonoids. The study indicates that residues of P. hysterophorus species when mixed in soil adversely affect the germination and the subsequent seedling growth of native plants (Acacia catechu, Achyranthes aspera and Cassia tora). These allelochemicals in the soil are released by leaching or decomposition and they directly or indirectly affect plant growth by altering the physico-chemical properties of soil. A gradual decrease was observed in the germination, root and shoot length and in dry weight of seedlings of native plants with the increase in the concentration of amended soil residues (1, 2 and 4%). The maximum decrease in seedling dry weight was recorded in Aaspera (54.75%) followed by A. catechu (42.74%) and C. tora 40.25%) respectively at 4% concentration of plant residues.


Key words: Allelochemicals, Parthenium hyterophorus, phenolics.