The Relationship between Systemic Resistance Induced by Pruning and Accumulation of Antifungal Substances in Barley Seedlings |
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Authors: | T. Hiramoto N. Abe R. Tobimatsu T. Shiraishi H. Oku T. Yamada Y. Ichinose |
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Affiliation: | Laboratory of Plant Pathology and Genetic Engineering, College of Agriculture, Okayama University, Tsushima, Okayama 700, Japan |
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Abstract: | Infection by a compatible race of Erysiphe graminis f. sp. hordei on barley secondary leaves was significantly suppressed upon pruning of the primary leaves when E. graminis hordei was inoculated 3–12 h after the pruning, but it, was rather enhanced during 15–21 h. The accumulation of antifungal substances was detected in hot ethanol extracts of barley seedlings from 15–27 h after pruning the primary leaves. Taking the time of the infection process of a challenger (E. graminis, hordei) into consideration, timing of systemic resistance induced upon pruning coincided with the accumulation of antifungal substances. |
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