Penicillium oxalicum and application thereof

The invention relates to the technical field of microorganisms, and particularly relates to a fungus obtained from deep sea cold spring sediment, an obtained natural azo steroid derivative, a preparation method of the natural azo steroid derivative and application of the natural azo steroid derivative in the aspects of algae inhibition and bacterium inhibition. The specific structural formula is shown as (I). The preparation method of the natural azo steroid derivative comprises the steps that 13-37 of the fungus Penicillium oxalicum from the deep sea cold spring sediment is inoculated into afungus culture medium for fermentation culture, and a fermentation product is separated and purified to obtain the azo steroid derivative shown as the formula (I). The obtained azo steroid derivativehas the activity of resisting microalgae and bacteria. 本发明涉及微生物技术领域，具体地说是一种深海冷泉沉积物获得的真菌，及获得的天然偶氮甾体衍生物及其制备方法和在抑藻和抑菌方面的应用。具体结构式如（I）所示，其制备方法为将深海冷泉沉积物来源的真菌草酸青霉（Penicillium oxalicum）13-37接种于真菌培养基中发酵培养，发酵产物经分离纯化，即为式（I）所示的偶氮甾体衍生物。本发明