12 トリプトファン部分を有するジケトピペラジンの構造と植物成長活性

概要

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Brevicompanines, which are new plant growth regulatory compounds, were isolated from a fungus P. brevicompactum Direrckx. We studied further to find new related compounds from the same fungus. As the result, three substances showing the elongation activity to the lettuce rootlet were isolated from EtOAc extracts of culture filtrate Spectroscopic analyses revealed that the compounds were cyclo(L-Trp-D-Leu), cyclo(L-Trp-D-Ile), and cyclo(L-Trp-D-Val). The structure-activity relationship was not observed between the stereochemistry of three compounds and the lettuce-root growth. The length of side chain of amino acid moiety did not affect the activity. Only diketopiperazines containing a tryptophan moiety showed the growth activity. Therefore, tryptophan moiety of a diketopiperazine compound may take part in the growth activity.
植物化学調節学会の論文
2000-11-02