重金属对溶磷黑曲霉生长的影响  

Effect of heavy metals on the phosphate-solubilizing Aspergillus niger

作　　者：冯宏[1] 王艳霞[2] 李永涛[1] 张志红[1] 郭彦彪[1] 

机构地区：[1]华南农业大学资源环境学院,广东广州510642 [2]西南林学院环境科学与工程系,云南昆明650224

出　　处：《广东农业科学》2010年第6期200-202,共3页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(40801099;40901129)

摘　　要：采用PDA培养基添加不同浓度的单一重金属离子,研究10种重金属对溶磷黑曲霉(Aspergillusniger)生长的影响。结果表明:较低浓度Cu2+(低于100mg/L)对黑曲霉的整个生长早期有促进作用;Pb2+抑制黑曲霉孢子在培养基中的萌发;Co2+浓度在100mg/L以下对黑曲霉生长的抑制较为轻微;Ag+胁迫对黑曲霉菌落直径的影响变化规律与Zn2+基本一致;Se4+、Ni2+、Cd2+、Hg+和Cr6+浓度分别在200、200、100、25、25mg/L浓度时,黑曲霉生长受到完全抑制。10种重金属离子对黑曲霉抑制作用强弱顺序大致为:Hg2+、Cr6+>Cd2+>Se4+>Ni2+>Zn2+>Ag+>Co2+>Pb2+>Cu2+。Ten kinds of heavy metals were added in PDA medium to observe the growth of Aspergillus niger. The results showed that Cu2＋ in low concentration can promoted the growth of Aspergillus niger. Pb2＋ inhibited spore germination in culture medium. The inhibition of Co2＋ when its concentration was less than 100 mg/L was very slight. The change of colony diameter by Ag ＋ Stress was consistent with Zn2＋, the growth of Aspergillus niger completely inhibited when Se4＋and Ni2＋ concentration were 200 mg/L,Cd2＋ concentration was 100 mg/L,Hg＋ and Cr6＋ concentration were 25 mg/L. The order of inhibition was Hg2＋、Cr6＋Cd2＋Se4＋Ni2＋Zn2＋Ag＋Co2＋Pb2＋Cu2＋.

关 键 词：黑曲霉 重金属 菌落直径 

分 类 号：Q93[生物学—微生物学] X53[环境科学与工程—环境工程]