Agaricus Albertii as a source of bioactive compounds: comparison between Portuguese and Serbian species
Conference Paper
Overview
Overview
abstract
FCT (Portugal) and COMPETE/QREN/EU for financial support through research project
PTDC/AGR-ALI/11 0062/2009, PEst-OE/AGR/UI0690/2011 CIMO strategic project and L. Barros
grant (SFRH/BPD/4609/2008), and to Serbian Ministry of Education and Science for financial
support (grant number 173032).
Mushrooms are widely appreciated all over the world for their nutritional [1] and bioactive
properties, being a source of antioxidant compounds [2]. Its consumption has increased over the
last years and, due to the increased information available related to edible mushrooms, even rare
species started to be an option as food. In this work, the chemical characterization and the
antioxidant properties of Agaricus albertii Bon., collected in Portugal and Serbia, were evaluated
and compared. The individual profiles of organic acids and phenolic compounds were obtained by
UFLC-PDA; tocopherols and free sugars were characterized by HPLC-fluorescence and HPLCRI
, respectively, and the fatty acids profile was obtained by GC-FID. The antioxidant properties
were assessed through the evaluation of the reducing power, radical scavenging activity and lipid
peroxidation inhibition of the samples. The Serbian sample revealed the highest levels of total
organic acids {5.14 g/1 00 g dry weight) while the Portuguese one gave the highest content in
phenolic acids (11.76 mg/1 00 g). In this sample, it was not possible to identify tocopherols.
Rhamnose was only found in A. albertii from Serbia (2.65 g/1 00 g), while fructose was only found
in the Portuguese sample (0.48 g/1 00 g). Mannitol and trehalose were quantified in both samples.
Polyunsaturated fatty acids predominated over mono- and saturated fatty acids. Generally, the
sample from Serbia revealed the highest antioxidant potential, with the highest reducing power,
radical scavenging activity and lipid peroxidation inhibition evaluated through the β~carotene/
linoleate assay. This work is the result of a cooperation between Portugal and Serbia,
allowing a comparative study within the same species from different origins.
