Mortirella sp. is common flora in polluted industrial zones.
The
Mortirella strain An-865 was resistant to lead but sensible to zinc concentrations
of 500 ppm which inhibited the growing, remarkable was that from all the
fungus tested, only Mortirella sp. grew in presence of mercury.
Mortirella
sp. behavior in presence of copper was similar to Mucor
sp (An-105). For this strains seems benefic the presence of copper
concentrations of 100 ppm, a two fold concentration inhibited notably the
growing pattern. Lead, in spite of being a very toxic metal, stimulated
the growing at 100 ppm and shows no inhibition even at the highest doses
tested which was 500 ppm.
| Petri
dish labeled (a)
is control strain with no metal applied. Petri dishes labeled (d)
and (e)
contain lead concentrations of at 100 ppm and 500 ppm concentrations, Mortirella
sp. showed resistance to both concentrations. The pattern changed with
zinc (Zn++) application, now
showing resistance only to 100 ppm (f)
but is not the case for 500 ppm (g).
With copper (Cu++) application
in 100 ppm (b),
colonies growing pattern was similar to control, in 500 ppm was totally
inhibited. Mortirella sp. was the only fungus studied which developed
colonies in a media containing 500 ppm of mercury (c)
.
|
|