外瓶霉属真菌耐药性和降解能力的研究

外瓶霉属(Exophiala)真菌对五氯酚和杂酚油都有很强的耐药性,其中以菌株P-3182对五氯酚和菌株P-2830、P-3182对杂酚油的耐药性最强。外瓶霉属真菌不但能在五氯酚和杂酚油溶液中生长,而且具有降解这两种防腐剂的能力。而在砷铬酸铜溶液中不能生长,对环烷酸铜和砷铬酸铜的耐药性与对照菌种相似或稍高。

TOLERANCE AND DEGRADATION OF THE EXOPHIALA ISOLATES TO CREOSOTE,PCP,COPPER NAPHTHENATE AND CCA-c

Exophiala isolates demonstrated high resistance to creosote and pentachlorophenol (PCP). Difference in the resistance of Exophiala isolates to creosote and PCP was evident. Exophiala isolates exhibited a wide range of tolerance to PCP. It is significant that Exophiala isolates were more tolerant than Poria placenta (Basidiomycete dacayer). Except P-3182, all other Exophiala isolates were similar to or a little more tolerant than Phialophora hetermorpha, but less tolerant than Rhinocladiella atrovirens, P-3182 was the most tolerant compared with the Exophiala isolates and reference fungi, its inhibition threshold was 49. 5ppm. The Exophiala isolates displayed a wide range of tolerance to creosote, too. These isolates were more resistant than P. placenta and Ph. hetermorpha, but less tolerant than Rh. atrovirens. Among the isolates, P -2830 (1.15%) was the most tolerant and P-3182 (0.88%) was the next. For the test of fungal growth in liquid culture with creosote and PCP, changes were obvious between 0 and 3 weeks. This result indicates that Exophiala isolates can degrade creosote, PCP and propagate within the tested concentration. Exophiala isolates exhibited high resistence to and can degrade creosote and PCP. There was good agreement among isolation frequency and the invasion of the poles by some microfungi appeared to precede the appearance of Basidiomycete decayer. To copper naphthenate and CCA - c, the Exophiala isolates were similar to or a littie more tolerant than reference fungi. The Exophiala isolates can not grow in liquid medium with CCA-c.