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Effect of temperature and pH on the toxicity of aluminium towards two new, soil born species of Arthrobacter sp.
Author(s) -
Illmer Paul,
Mutschlechner Wolfgang
Publication year - 2004
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200310293
Subject(s) - arthrobacter , bacteria , aluminium , toxicity , chemistry , microorganism , environmental chemistry , biology , nuclear chemistry , microbiology and biotechnology , food science , organic chemistry , genetics
Two coryneform bacteria Arthrobacter sp. PI/1–95 (Arth1) and Arthrobacter sp. PI/3‐95 (Arth3) were isolated from forest soil characterized and investigated with respect to their reaction towards aluminium (Al). Sigmoid functions were used to describe dose‐response relationships between Al concentration and microbial growth and to calculate EC‐values. EC 100 – indicating a complete inhibition of microbial growth – varied between 185 μ M Al for Arth1 and 11 m M Al for Arth3 . A pure pH effect seems probable in connection with the sensitive Arth1 but not with the tolerant species Arth3 . Temperature was shown to distinctly increase the toxic effects of Al towards Arth3 whereas only a moderate modification in Al‐toxicity was observed with Arth1 . (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)