36 Infuluence of theoroXide,a natural Product, on the accumulation of endogegenous jasmonoids in in vitro cultures of potato single-node segment and morning glory leaves
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概要
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Theobroxide is an epoxy cyclohexene compound isolated from the fungus Lasiodiplodia theobromae and induces potato microtuber formation in vitro as low as 5x10^<-6>M (Nakamori et al., 1994). When sprayed on potato (Solanum tuberosum L.) and morning glory (Pharbitis nil) plants, which require short days to induce tubers and flower buds, respectively, these plants kept in non-inducing conditions (long days) produced corresponded tubers and flower buds (Yoshihara et al., 2000). However, the action mechanism of theobroxide is still not clear. The examination of the hypothesis that theobroxide may play an important role in the accumulation of endogenous jasmonoids was carried out in this study. In vitro bioassay using cultures of single-node segment of potato stems was performed with the supplement of theobroxide in the medium at different concentrations, the endogenous jasmonic acid (JA), tuberonic acid (TA, 12-hydroxy jasmonic acid) and its glucoside (TAG) in segments, stolons and microtubers were respectively quantitative analyzed. As concern as morning glory, plant seedlings were sprayed with theobroxide solution at a two-day interval, the endogenous JA and IA in the leaves were analyzed. An increase in the content of endogenous JA correlated with the concentration of theobroxide was observed in both segments and microtubers. Endogenous TA was only detected in segments, and the content increased with the concentration of theobroxide. The increase in the content of endogenous TAG caused by the treatment of theobroxide was also observed in microtubers. However, this trend was not found in stolons and segments. It was also found that spraying theobroxide on morning glory plants for 2-3 weeks under short and long days respectively increased 1.6 times and 2.3 times of JA in leaves. The theobroxide spray under short days caused 1.5 times increase in TA level in all treatments.
- 植物化学調節学会の論文
- 2001-10-09
著者
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YOSHIHARA Teruhiko
Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University
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FUJINO Yumiko
Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University
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Fujino Yumiko
Division Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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Yoshihara Teruhiko
Division Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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Matsuura Hideyuki
Division Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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Qing Yang
Division Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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- 36 Infuluence of theoroXide,a natural Product, on the accumulation of endogegenous jasmonoids in in vitro cultures of potato single-node segment and morning glory leaves
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