Department of Microbiology, The University of Texas at Austin, Austin, Texas 78712, and Department of Forest and Wood Sciences, Colorado State University, Fort Collins, Colorado 80523.
Appl Environ Microbiol. 1983 Nov;46(5):1080-3. doi: 10.1128/aem.46.5.1080-1083.1983.
The occurrence of ferrichrome-type hydroxamate siderophores in soil was confirmed. In the presence of the iron-scavenging chelator ethylenediamine[di(o-hydroxyphenylacetic)acid], soil extract stimulated the growth of an Escherichia coli strain possessing the ferrichrome transport protein (TonA) but did not stimulate growth of a strain lacking this protein (TonA). The siderophore concentration in a 1:1 (soil-water) extract was estimated to be approximately 78 nM. Specificity of the assay was supported by the absence of significant differential strain responses to ferric citrate, ferric 2,3-dihydroxybenzoate, enterochelin, ferrioxamine B, coprogen, and triacetylfusigen.
土壤中 ferrichrome 型羟肟酸类铁载体的存在得到了证实。在铁螯合剂乙二胺[二(邻羟基苯乙酸)]存在的情况下,土壤提取物刺激了具有 ferrichrome 转运蛋白(TonA)的大肠杆菌菌株的生长,但没有刺激缺乏这种蛋白的菌株(TonA)的生长。在 1:1(土壤-水)提取物中的铁载体浓度估计约为 78 nM。该测定的特异性得到了支持,即没有明显的差异菌株对柠檬酸铁、2,3-二羟基苯甲酸铁、肠菌素、ferrioxamine B、coprogen 和三乙酰fusigen 的反应。