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Allelopathic
effects of Juglone and decomposed walnut leaf juice on
muskmelon and cucumber seed germination and seedling growth
I. Terzi
Department
of Biology, Faculty of Education, Dumlupınar University,
Kütahya, Turkey.
E-mail:
iterzi@dumlupinar.edu.tr.
Tel: + 90 0274 2652031. Fax: (Office): +90 0274 2672057.
Accepted 4 April, 2008 |
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In this study, effects of juglone and decomposed walnut leaf
juice on muskmelon (Cucumis melo cv. Galia) and
cucumber (Cucumis sativus cv. Beith Alpha) seed
germination percentage and post-germination seedling growth
were investigated. Decomposition was carried out by keeping
the leaves in distilled water. Muskmelon and cucumber seeds
were germinated in Petri dishes at 25°C. Seed germination,
seedling elongation and weights were determined at day 10.
No significant effect of juglone and decomposed walnut leaf
juice on muskmelon seed germination percentage was observed.
However, germination of cucumber seed was inhibited
significantly. It was found that while both the dry weight
root and stems elongation of muskmelon and cucumber
seedlings were affected negatively by juglone and undiluted
decomposed walnut leaf juices. The negative effect decreased
as dilution ratios of decomposed leaf juice increased.
Key words: Cucumber, germination, juglone, muskmelon,
walnut leaf. |
