真菌对氧化铁的酶促还原作用。
Enzymatic reduction of iron oxide by fungi.
作者信息
Ottow J C, Von Klopotek A
机构信息
Institut für Landwirtschafiliche Mikrobiologie der Justus Liebig-Universität, Giessen, Germany.
出版信息
Appl Microbiol. 1969 Jul;18(1):41-3. doi: 10.1128/am.18.1.41-43.1969.
The occurrence of the iron-reducing phenomenon among some common fungi was studied. Results indicated that (i) the reduction of ferric iron to the ferrous state by fungi seems to be restricted to nitrate reductase-inducible strains such as Actinomucor repens, Alternaria tenuis, Fusarium oxysporum, and F. solani and (ii) the amount of dissolved ferrous iron may be reduced progressively by increasing the amount of nitrate added to the medium. Compared with a complex medium (Sabouraud medium), less iron became reduced if NO(3) was the only nitrogen source (Czapek Dox medium). These data strongly support the view that ferric iron is acting as an hydrogen acceptor in respiration, competing with nitrate for electrons that are mediated by the enzyme nitrate reductase. The significance of this property from an ecological viewpoint is discussed.
对一些常见真菌中铁还原现象的发生情况进行了研究。结果表明：（i）真菌将三价铁还原为二价铁的现象似乎仅限于硝酸盐还原酶可诱导的菌株，如展青霉、细交链孢霉、尖孢镰刀菌和茄病镰刀菌；（ii）通过增加培养基中硝酸盐的添加量，溶解的二价铁量可能会逐渐减少。与复合培养基（沙氏培养基）相比，如果以硝酸盐作为唯一氮源（察氏培养基），则铁的还原量较少。这些数据有力地支持了这样一种观点，即三价铁在呼吸作用中作为氢受体，与硝酸盐竞争由硝酸还原酶介导的电子。从生态学角度讨论了这一特性的意义。
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