Open AccessNegative fungal chemotropism to toxic metals
Author(s) -
Fomina Marina,
Ritz Karl,
Gadd Geoffrey M
Publication year - 2000
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2000.tb09425.x
Subject(s) - geotrichum , hypha , magnaporthe grisea , biology , agar , trichoderma viride , metal , sucrose , botany , chemistry , food science , bacteria , biochemistry , genetics , organic chemistry , oryza sativa , gene
Hyphal growth responses of Geotrichum candidum , Gliocladium roseum , Humicola grisea and Trichoderma viride to Cu and Cd were studied using a simple tessellated agar tile system. Negative chemotropic behaviour of hyphae, which included curling and growth away from metal‐containing domains, occurred in all species and with both metals. Both toxic metal and sucrose concentrations in the medium modulated the magnitude of the negative chemotropic effects observed. In general, greater concentrations of metals led to a higher level of negative chemotropism in response to Cu and Cd, which could be reduced with increasing concentrations of sucrose in the medium. This suggests that resource availability affects the ability of these fungi to grow into metal‐laden domains.