TITLE:
Regulation of Respiratory and Ligninolytic Enzyme Activity of Lentinula edodes by Selenium
AUTHORS:
Regiane Gonçalves Feitosa Leal Nunes, Jose Maria Rodrigues da Luz, Elizabete Fantuzzi, Maria Catarina Megumi Kasuya, Maria Cristina Dantas Vanetti
KEYWORDS:
Shiitake; Laccase; Se-Enriched Mushrooms; Eucalypt Sawdust; Lignocellulosic Residues
JOURNAL NAME:
Advances in Microbiology,
Vol.3 No.8A,
December
26,
2013
ABSTRACT: The production of mushrooms
enriched with essential elements, e.g. selenium, for human health is an
interesting strategy to improve the functional foods supply. The selenium is an essential mineral and
makes part of structure of enzymes involved in the oxidative metabolism.
However, the selenium effect on the activity of respiratory and lignocellulolytic enzymes has not been considered. The understanding of this effect is important to determine the selenium concentration
that increases the mushroom productivity and the degradation rate of the
substrate. In this study, it was observed reduction of the respiratory activity
of Lentinula edodes (Berk.)
Pegler, the shiitake mushroom, in
function of the increasing of the sodium selenite concentration in the
substrate (p , but it increased the activity of the oxidative enzyme (laccase). Respiratory activity of L.
edodes has a negative correlation with sodium selenite concentration added
in substrate. Thus is important to define the ideal dose of
selenium to be added to the substrate for
increasing lignocellulosic residues degradation and, consequently, guarantee a higher production of
Se-enriched mushrooms.