Resistance to fusarium basal rot of onion in greenhouse and field and associated expression of antifungal compounds |
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Authors: | Email author" target="_blank">N??zerEmail author N?D?K?ycü G?Chilosi P?Magro |
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Institution: | (1) Dept. of Plant Protection, Faculty of Agriculture, University of Trakya, 59030 Tekirdağ, Turkey;(2) Dept. of Plant Protection, Faculty of Agriculture, University of Tuscia, 01100 Viterbo, Italy |
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Abstract: | Greenhouse and field evaluations of onion for resistance to Fusarium basal rot caused byFusarium oxysporum f.sp.cepae were conducted on cultivars ‘Akgün 12’ and ‘Rossa Savonese’ previously described as resistant at the seedling stage. In the
greenhouse experiments inoculations were carried out on seeds or soil; in the field experiments evaluation was performed on
onion sets from plants grown in naturally infested soils. Akgün 12 and to a lesser extent Rossa Savonese were resistant to
the disease at the bulb stage in all experiments. Results were also consistent with those obtained from a previous screening
at the seedling stage. Onion sets were also extracted and fractionated by thin layer chromatography to determine their content
of antifungal compounds. Extracts were characterized by the expression of distinct antifungal components, which may be involved
in resistance to the pathogen.
http://www.phytoparasitica.org posting July 14, 2004. |
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Keywords: | Allium cepa L antifungal compounds Fusarium oxysporum f sp cepae greenhouse tests field experiments resistance |
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