Allelopathic effect of medicinal plant Cannabis sativa L. on Lactuca sativa L. seed germination


  • Homa MAHMOODZADEH Department of Biology, Faculty of Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran
  • Mohsen GHASEMI Department of Agriculture, Mashhad Branch, Islamic Azad University, Mashhad, Iran
  • Hasan ZANGANEH Department of Biology, Faculty of Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran



allelopathy, biological competition, lettuce, Lactuca sativa, cannabis, Cannabis sativa, germination, extracts


In order to examine allelopathic effect of Cannabis sativa L. on germination capability and seedling growth of Lactuca sativa L., a study was performed in laboratory conditions. Treatments were set up in randomised block design in four replications for each of four concentration ranges of 25, 50, 75 and 100 % of aqueous extract made of shoot parts and 4 identical extract concentrations made of root of cannabis. Control variant was lettuce seed treated by distilled water. During the studies shoot and seminal root length of lettuce seedlings were measured after treatments with different concentrations of extracts made of root and shoot parts of cannabis, and the obtained values were compared with the control. The obtained results suggest that the extract from the shoot parts of cannabis in high concentrations of 75 and 100 % had inhibiting effect to the germination indices while the extract from the root had no statistically significant effect on germination of lettuce seeds. Extract made of root part of cannabis showed also stimulatory effect to shoot and seminal root length of lettuce seedlings in extract concentrations of 50, 75 and 100 %.


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26. 11. 2015



Agronomy section

How to Cite

MAHMOODZADEH, H., GHASEMI, M., & ZANGANEH, H. (2015). Allelopathic effect of medicinal plant Cannabis sativa L. on Lactuca sativa L. seed germination. Acta Agriculturae Slovenica, 105(2), 233–239.

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