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Allelopathic Effect of Ailanthus altissima Extracts on Tomato Seeds



Ailanthus altissima, plant extracts, allelopathic effect, tomato seed, germination


The tree-of-heaven plant, due to the content of secondary metabolites with a variety of unique properties, is widely studied as 
a potential raw material for obtaining remedies for organic farming. Our work aimed to study the allelopathic effect of Ailanthus 
altissima extracts on tomato (Lycopersicon esculentum) seeds. Dry plant materials of ailanthus (leaves and seeds) were extracted 
with distilled water and applied to tomato seeds at a concentration of 15, 10, and 5 of dry residue to investigate their 
impact on the energy of germination, total germination, length of radicles and hypocotyls. The result revealed that the ailanthus 
extracts from leaves, collected in June, and from seeds, collected from July, had a significant inhibitory effect on all studied 
parameters. The  total germination rate of seeds was suppressed on average by 56.2–69.0% compared to the control, and by 
44.2–57.0% compared to the chemical standard. The length of the tomato radicles decreased by 1.4–18.6 times compared to 
the control. The most significant decrease was observed in germination energy and hypocotyl length. All three ailanthus extracts 
tested in the concentration of 15 significantly inhibited germination energy and hypocotyl growth of tomato seeds. It 
was concluded that the leaves and immature seeds of Ailanthus altissima contain potential allelopathic substances that affect 
the  energy of  germination, and total germination rate, and inhibit the hypocotyl and radicle length of tomatoes. Therefore, 
aqueous extracts of ailanthus should be used to protect tomato fields from weeds only in the post-emergence period.

Author Biographies

  • Dina Elisovetcaia, Moldova State University, Institute of Genetics, Physiology and Plant Protection, Chisinau, Republic of Moldova

    Department of Plant Physiology; Rank: Associate professor

  • Vladimira Horčinova Sedlačkova, Slovak University of Agriculture in Nitra, Faculty of Agrobiology and Food Resources, Nitra, Slovak Republic

    Institute of Plant and Environmental Sciences; Rank: scientific researcher

  • Raisa Ivanova, Moldova State University, Institute of Genetics, Physiology and Plant Protection, Chisinau, Republic of Moldova

    Department of Plant physiology; Rank: Associate professor

  • Jan Brindza, Slovak University of Agriculture in Nitra, Faculty of Agrobiology and Food Resources, Nitra, Slovak Republic

    Institute of Plant and Environmental Sciences; Rank: Associate professor


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