INVESTIGADORES
FONSECA Maria Isabel
artículos
Título:
Influence of culture conditions on laccase production, growth, and isoenzymes patterns in native white rot fungi from the Misiones rainforest (Argentina)
Autor/es:
FONSECA, M. I.; FARIÑA, J. I..; SANABRIA, N. I., VILLALBA, L. L., ZAPATA, P. D
Revista:
BIORESOURCES
Editorial:
NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI
Referencias:
Lugar: Raleigh; Año: 2013 vol. 8 p. 2855 - 2866
ISSN:
1930-2126
Resumen:
Many biotechnological processes pursuing sustainability
aim
for
effective, inexpensive
,
and environmentally friendly alternatives to
replace conventional practices.
Laccase
-
containing
l
ignocellulolytic
systems from
white rot fungi
have been
show
n
to be
an
effici
ent
enzymatic tool for ecofriendly biological treatments
.
One
objective
of
t
he
biotechnological enzymes production proce
ss
is to
find
optimum
growing
and secreti
on conditions for
a
selected
fungus. In this work, different
fungi isolated from the Misiones
rainforest (
Coriolus versicolor
f.
antarcticus
BAFC
-
266,
Ganoderma applanatum
strain F,
Phlebia
brevispora
BAFC
-
633
,
and
Pycnoporus sanguineus
BAFC
-
2126) were
incubated at different temperatures (25, 29, 33
°C) and
pH
values
(3.5,
4.5, 5.5) under static co
nditions for 7, 10
,
and 14 days to evaluate their
growing
ability and
laccase
(Lac)
production. Results revealed specific
favorable conditions for growth and protein secretion depending on the
fungus under consideration, making
it
necessary to adjust these
parameters for each particular case. The combined effect of these
cultivation parameters showed a marked influence on the secreted Lac
activity by
P. brevispora
BAFC 633, with the highest activity (~ 240 U/l) at
29
ºC and pH 4.5 at the 10
th
day of cultiva
tion. The presence of Lac
isoenzymes also depended on the pH, temperature
,
and time of
cultivation for the different tested fungi.