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The allelopathic effect of the common walnut Juglans regia L. was examined by bioanalysis of the extract on seed germination and growth of lettuce (Lactuca sativa L.) and tomato (Solanum lycopersicum L.). Aqueous extracts of leaves of different concentrations (concentrated extract, 1:2, 1:4 and 1:8) were made to determine the allelopathic potential, and distilled water was used as a control. The obtained results showed that the lettuce is more sensitive, and the tomato is more tolerant to the applied concentrations of the aqueous extract of juglone. All applied concentrations inhibited lettuce germination, while lower concentrations had stimulating effect on growth. In tomatoes, the inhibitory effect was fond in concentrated solution and 1:2, while lower concentrations had a stimulating effect. Allelopathy is a unique phenomenon in nature that is relatively new in science, and the results of this experiment are not only important in botanical research, but also have application in practice.
Ercisli, S., Esitken, A., Turkkal, C., & Orhan, E. 2005. The allelopathic effects of juglone and walnut leaf extract on yield, growth, chemical and PNE compositions of strawberry CV. Fern. Plant, Soil and Environment, 51 (6), 283 - 287.
Funk, D.T, Case, P.J, Rietveld, &W.J, Phares, R.E. 1979. Notes: effects of juglone on the growth of coniferous seedlings. Forest Science, 25, 452–454.
Inderjit, Wardle, D. A., Karban, R., &Callaway R. M. 2011. The ecosystem and evolutionary contexts of allelopathy. Trends in Ecology Evolution, 26, 655–662.
Islam, Irum-Us., Ahmed, M., Asrar, M., & Siddiqui, M. F. 2014. Allelopathic effects of Chenopodium murale L. on four test species. Fuuast Journal of Biology, 4 (1), 39-42.
Jose, S., & Gillespie, A.R. 1998. Allelopathy in black walnut (Juglans nigra L.) alley cropping. II. Effects of juglone on hydroponically grown corn (Zea mays L.) and soybean (Glycine max L.Merr.) growth and physiology. Plant and Soil, 203, 199-205.
Khandakar, A. L. Bradbeer, J. W. 1983. Jute seed quality. Bangladesh Agricultural Research Council, Dhaka. Bangladesh.
Kocacaliskan, B. Terzi, I. 2001. Alleopathic effects of walnut leaf extracts and juglone on seed germination and seddling growth. Journal of Horticultura Science & Biotechnology. 76 (4), 436-440.
Kocacaliskan, I., Akgul, T., & Erisen, S. 2019. Effect of Juglone on Seed Germination and Seedling Growth of Four Common Vegetables. International Journal of Life Sciences and Biotechnology, 2 (1), 43-49.
Kocaçalışkan, T., Turan, E., & Terzi, I. 2008. Juglone effects on seedling growth in intact and coatless seeds of muskmelon. African Journal of Biotechnology, 7 (24), 4446-4449.
Lambers, H., Chapin III F.S., & Pons, T.L. 1998. Plant Physiological Ecology. Springer-Verlang, New York.
Milewska-Hendel, A., Małgorzata, Polak., Sala, K., Zieleźnik-Rusinowska, P., Robert Gawecki, R., & Ewa Kurczyńska, E. 2017. Morpho-histological analysis of tomato (Solanum lycopersicum L.) plants after treatment with juglone. Acta Agrobotanika, 1-10.
Norsworthy, J. K. 2003. Allelopathic potential of wild radish (Raphanus raphanistrum). Weed Technology, 17, 307-313.
Qin, C., Nagai, M., Hagins, W., & Hobbs, R. 2011. The Allelopathic Effects of Juglone Containing Nuts. The Journal of Experimental Secondary Science, 1-5.
Rice, E. L. 1984. Allelopathy. 2nd Edition, Academic Press, New York, p. 422.
Rietveld, W. J. 1983. Allelopathic effects of juglone on germination and growth of several herbaceous and woody species. Journal of Chemical Ecology, 9 (2), 295-308.
Rodino, S., Butu, M., & Butu, A. 2016. Comparative study on allelopathic potential of Petroselinum crispum (Mill.) Fuss. National Institute of Research and Development for Biological Siences, 296, 17-16.
Scott, R., & Sullivan, W. C. 2007. A review of suitable companion crops for black walnut. Agroforesty Systems, 71. 185–193.
Tekintas, E., Tanrisever, A., & Mendilcioglu, K. 1988a. Cevizlerde (Juglans regia L.) juglon izolasyonu ve juglon iceriğinin yillrk değismi. Ege Ünversitesi Ziraat Dergisi, 25, 214-25.
Terzi, I. Kocaçalışkan, I. 2009. Alleviation of juglone stress by plant growth regulators in germination of cress seeds. Scientific Research and Essays, 4, 436–439.
Terzi, I. 2008. Allelopathic effects of juglon and decomposed walnut leaf juice on muskmelon and cucumber seed germination and seedling growth. African Journal of Biotehnology, 7 (12), 1870-1874.
Terzi, I., Kocaçalişkan, I., Benlioğlu, O., & Solak, K. 2003. Effects of juglone on growth of cucumber seedlings with respect to physiological and anatomical parameters. Acta Physiologiae Plantarum, 25, 353–356.