Temperature-water and competitive interactions in vitro of two toxic black molds,Fusarium oxysporum and Rhizopus stolonifer isolated from a shower setting  

作　　者：Yoder JA Klever LA Dobrotka CJ 

机构地区：[1]Department of Biology,Wittenberg University,Springfield,OH,45504,USA

出　　处：《Studies in Fungi》2018年第1期248-255,共8页真菌研究（英文）

基　　金：Funded by a gift from Elizabeth E.Powelson to the Department of Biology for support of undergraduate research at Wittenberg University.

摘　　要：We report differences in secondary resource capture and upper lethal temperature as survival attributes for Fusarium oxysporum(FOSC)and Rhizopus stolonifer,two medically important fungi that were co-isolated from a table shower caddy.Isolates of these two shower-associated fungi have been deposited at the University of Alberta Microfungus Collection and Herbarium,Centre for Global Microfungal Biodiversity(UAMH,Toronto,CAN)as R.stolonifer UAMH 11965 and F.oxysporum(FOSC)UAMH 11966;this paper provides growth characteristics for these two strains that can be used for further studies on black molds in bathrooms given the relevance to public health.Both R.stolonifer UAMH 11965 and F.oxysporum(FOSC)UAMH 11966 require contact with a wet surface substrate with water activity≥0.95 aw for growth and sporulation.In contrast to F.oxysporum,R.stolonifer has a 4-6x,faster radial growth rate,superior colonizing ability,and capacity for overgrowth(exploitative competition).This F.oxysporum(FOSC)strain,however,is thermotolerant,as demonstrated by broader thermal growth range and higher optimum temperature,which puts fewer limitations on its growth compared to R.stolonifer.This is a point of public awareness for mold-sensitive and immunocompromised people that wet,wood substrates in a shower can permit colonization and competitive interactions that can concentrate R.stolonifer and F.oxysporum spores.

关 键 词：BATHROOM fungal ecology public health radial growth resource capture 

分 类 号：S43[农业科学—农业昆虫与害虫防治]