Allelopathic Effect of Conyza albida on Avena sativa and Spirodela polyrhiza |
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| Authors: | G Economou O Tzakou A Gani A Yannitsaros D Bilalis |
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| Institution: | Authors' addresses: Prof. Dr G. Economou and Prof. Dr D. Bilalis, Agriculture University of Athens, Department of CropScience, Laboratory of Crop Production, 75 Iera Odos, Athens, 18855, Greece (corresponding author;e-mail: );Prof. Dr O. Tzakou, and A. Gani, MSc., University of Athens, Department of Pharmacognosy, School of Pharmacy, Zografou15771, Greece;Prof. Dr Yannitsaros, University of Athens, Department of Biology, Zografou 15771, Greece |
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| Abstract: | The allelopathic influence of four plant tissues of Conyza albida (stems, leaves and inflorescences) on oat growth were investigated using in vivo tests. Oat growth (fresh and dry weights of above and underground parts) was inhibited from phytotoxic activity of upper leaves and inflorescence tissues of C. albida in pot studies. The inhibition was significantly higher than in the other tissues studied. The inhibiting action of crude extracts and volatile compounds from young plants (rosette) and mature plants were examined using two bioassay methods: (a) seed germination and radicle growth of oat and (b) fresh weight of duckweed plants. Both bioassayed species exhibited greater phytotoxic response from the young plants, collected in winter, than from the mature ones. |
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| Keywords: | Avena sativa bioassay Conyza albida duckweed horseweed interference oat Spirodela polyrhiza volatile compounds |
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