Biological activity of phyllosinol, a phytotoxic compound isolated from a culture filtrate of Phyllosticta sp. |
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| Authors: | SAKAI RYUTARO; SATO RINZO; NIKI HIROSHI; SAKAMURA SADAO |
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| Institution: | 1Department of Plant Pathology and Entomology, National Institute of Agricultural Sciences Nishigahara, Tokyo
2Hokkaido National Agricultural Experiment Station Sapporo, Japan
3Department of Agricultural Chemistry, Hokkaido University Sapporo, Japan |
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| Abstract: | - Phyllosinol is a phytotoxic metabolite of Phyllosticta sp. Thissubstance at 100 µg/ml produced dark grey necrotic lesionson the leaf of red clover. Sensitivities of various plant speciesto phyllosinol differed both quantitatively and qualitatively.
- Phyllosinol reduced root growth in rice seedlings by 60% at10–4 M, whereas stimulation of root elongation occurredat a concentration range from 10–9 to 10–5 M.
- Phyllosinolat 2.5x10–4M promoted adventitious root formationin epicotylsof Azukia cuttings by about 100%. Promotion waspartly reducedby simultaneous application of cysteine.
- IAA-induced elongationof isolated Avena coleoptile sectionswas inhibited by phyllosinolat a concentration range from 10–5to 10–3M.
- Sulfhydrylcompounds, i.e. cysteine and glutathione relievedinhibitioncaused by phyllosinol in IAA-induced elongation ofAvena coleoptilesections.
- GA3-induced elongation of wheat leaf sections wasslightly inhibitedby phyllosinol at 10–4M.
- Phyllosinolalso has antibiotic activity. Among the organismstested, Phycomycetesand Gram-negative bacteria appeared mostsusceptible to phyllosinol.
(Received April 21, 1970; ) |
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