14. 熱ショック処理がトマトに誘導する病害抵抗性機構の解析

概要

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For the purpose of estimating heat shock as a protection activator, the aerial portion of the seedlings at the three-leaf stage of tomato cv. 'Natsunokoma' were dipped in water at various temperatures. Challenge inoculation test with Botrytis cinerea were performed onto the cut of the first and second true leaves 24h after the heat shock treatment. Although the infiltrated area spread beyond the region of inoculation part in the leaves of non-treated control plants, the less disease symptoms were observed in the leaves dipped into hotter water. To clarify the resistance mechanisms, salicylic acid accumulation and the expression of PR genes after the heat shock treatment were examined. The results indicated that treatment at 45℃ was most effective, accompanying the salicylic acid accumulation and PR-1 gene mRNA. These results suggested that the heat shock treatment induced systemic acquired resistance in tomato plants.
植物化学調節学会の論文
2005-10-13