Charudattan R, Rao K V
Appl Environ Microbiol. 1982 Apr;43(4):846-9. doi: 10.1128/aem.43.4.846-849.1982.
Two crystalline red pigments with phytotoxic activity were isolated from culture filtrates of Alternaria eichhorniae, a pathogen of the water hyacinth Eichhornia crassipes. The pigments were present in the ratio of 4:1 and were identified as bostrycin and 4-deoxybostrycin, respectively. This is the first isolation of 4-deoxybostrycin from a natural source. Bostrycin, 4-deoxybostrycin, and their isopropylidene derivatives induced necrosis on tested plant leaves comparable to the A. eichhorniae-induced necrosis on water hyacinth. The lowest phytotoxic concentrations of crystalline bostrycin and 4-deoxybostrycin on water hyacinth leaves were about 7 and 30 microgram/ml, respectively. Both substances were inhibitory to Bacillus subtilis but were inactive against the fungus Geotrichum candidum.
从凤眼蓝病原菌——互隔交链孢菌（Alternaria eichhorniae）的培养滤液中分离出两种具有植物毒性活性的结晶红色色素。这两种色素的比例为4:1，分别被鉴定为波斯特菌素（bostrycin）和4-脱氧波斯特菌素（4-deoxybostrycin）。这是首次从天然来源分离出4-脱氧波斯特菌素。波斯特菌素、4-脱氧波斯特菌素及其亚异丙基衍生物在受试植物叶片上诱导的坏死与互隔交链孢菌在凤眼蓝上诱导的坏死相当。结晶波斯特菌素和4-脱氧波斯特菌素对凤眼蓝叶片的最低植物毒性浓度分别约为7微克/毫升和30微克/毫升。这两种物质对枯草芽孢杆菌有抑制作用，但对白色地霉（Geotrichum candidum）真菌无活性。
