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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Accumulation of Isohemigossypolone and Its Related Compounds in the Inner Bark and Heartwood of Diseased Pachira aquatica
| Title: | Accumulation of Isohemigossypolone and Its Related Compounds in the Inner Bark and Heartwood of Diseased Pachira aquatica |
| Authors: | SHIBATANI, Mariko Browse this author | | HASHIDOKO, Yasuyuki Browse this author | | TAHARA, Satoshi Browse this author |
| Keywords: | Pachira aquatica | | isohemigossypolone | | cadinane sesquiterpenes | | norcadinane | | phytoalexin |
| Issue Date: | 23-Oct-1999 |
| Publisher: | 社団法人日本農芸化学会 |
| Journal Title: | Bioscience, biotechnology, and biochemistry |
| Volume: | 63 |
| Issue: | 10 |
| Start Page: | 1777 |
| End Page: | 1780 |
| Abstract: | Isohemigossypolone (1) and 2-O-methylisohemigossypolone (2), major fungitoxins of Pachira aquatica, were found to accumulate locally in the outer bark of the swollen trunk, whereas the inner bark and heartwood contained only a trace amount of them. From P. aquatica that was infected with a phytopathogenic bacterium, we detected significant amounts of 1 and 2 from browned inner tissues of the swollen trunk. According to a quantitative analysis by a gas-chromatograph, the concentration of 1 in the diseased inner tissues was calculated to be approximately 780μg/g f.w., which was the same level as that in the outer bark of healthy individuals. These findings suggest that the inner tissues inducibly produced and accumulated antifungals 1 and 2 during infection events, as do many plants with phytoalexins. 11-Nor-2-O-methylisohemigossypolone (3), showing approximately equivalent fungitoxic activity to that of 1 and 2,was also isolated from the infected inner tissues. We screened pathogenic bacteria from the infected tissue, and isolated a rod-shaped bacterium that was tentatively identified as Pseudomonas sp. which promoted tissuebrowning on sectioned disks of P. aquatica trunks. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/45494 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 橋床 泰之
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