Investigating germination parameters of Malva ‎sylvestris after treatment with extract of Eucalyptus ‎camaldolensis ‎

Banafsheh Heidari Koholi¹ Mohammad Hassan Assareh² Shoukufeh Enteshari³ Anahita Shariat⁴

1) Master of Science, Payame Noor University, Najafabad, Iran
2) Scientific board, Seed and Plant Certification and Registration Institute, Karaj, Iran
3) Scientific board, Payame Noor University, Najafabad, Iran ‎
4) Scientific board, Research Institute of Forests and Rangelands, Tehran, Iran

Publication : 7th International Conference on Applied Researches in Science & Engineering (7carse.com)
Abstract :
The use of allelochemicals as natural herbicides is a new approach to reduce the adverse ‎effects of chemical herbicides on the environment and prevent weed resistance to herbicides. ‎In this study, the allelopathic effect of Eucalyptus camaldolensis leaves and roots on Malva ‎sylvestris species was tested in greenhouse conditions in 2008 at the Forestry and Pasture ‎Research Institute of the country. This study was conducted as a completely random design ‎with three repetitions and comparison of averages with Duncan s test at the level of 0.05. The ‎treatments used in the greenhouse stage were: control, dried leaf powder (5, 10, 15 grams), ‎fresh leaf powder (5, 10, 20 grams), ethanol extract of leaves (3, 6, 12 grams per liter), ‎aqueous extract of dry leaves (5, 10, 15%), aqueous extract of fresh leaves (10 and 20%) ‎and root secretions. In some of the pots, ethanol extract of dry leaves (3, 6, 12 g/l) was ‎sprayed on the leaves. The parameters measured in this study included plant length, ‎germination percentage, germination speed, germination index, Vigour Index. The results ‎obtained from the greenhouse phase showed that in all the measured traits, the most ‎inhibitory effect was related to the ethanolic extract, fresh leaf and dry leaf aqueous extracts ‎also had an inhibitory effect and the measured parameters also showed a decrease. The ‎fresh and dry leaf powders used acted as a covering layer and prevented moisture from ‎escaping. The effect of root secretions was also investigated in pots containing one-year-old ‎eucalyptus seedlings, which completely prevented the seeds from germinating.‎
Keywords : allelopathy Eucalyptus camaldolensis germination parameters Malva sylvestris root ‎secretions