XXIII Encontro Nacional da SPQ

Aveiro 12 a 14 de Junho de 2013

Titulo Livro de Resumos do XXIII Encontro Nacional cla SPQ Desafios em Qufmica

Coordenadores Diana C. G. A. Pinto e Artur M. S. Silva

Fotograjias Jose M. G. Pereira

Fotografia da Capa Departamento de Quimica e Laborat6rios Tecnologicos cla Universidacle de

Aveiro

Edifiio

Data

Sociedade Portuguesa de Quimica Av. da Republica, 45- 3° Esq. 1050-187 Lisboa- Portugal

Junho de 2013

Tiragem 350 Exemplar·es

Deposito Legal 360265/13

Impressiio e acabamentos Sersilito-Emp1·esa Grafica, Lda.

Catalogm;iio J•ecomendada Livro de resumos do XXIII Encontro Nacional da SPQ - Desafios em Quimica Universidade de Aveiro, 2013 - 387 p.

Quimica - Congressos

Reservados todos os direitos. Esta publicac;ao nao pode ser reproduzida ou transmitida, no todo ou em parte, par qualquer processo, eletr6nico, mecanico, fotoc6pia, gravac;ao ou outros, sem previa autorizac;ao do Editor.

lnlt•r(.n:c' tit t}utmu·.t• ~tudt st-~ur uu; 1, .llinu 111 1\:••u .tmhi,·nlt• c· C"IH"r~i~l ( umtunc: u.m.., urdi'

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Triacylglycerols profile and principal component analysis as a chemometric tool to identify wild edible mushroom genera

Joiio C. M. Barreira,"·b M. Beatriz P. P. Oliveirab, Isabel C. F. R. Ferreira•

'Mmmrain Researclr Cemer (CIMO). ESA. Polyreclmic lllsrirme of Bragam;a. Apartado 117 2. 5301-855 Bmga,,a, /'orwgal: ' llt:QUIMTE. Deparmrenr of Chemical Sciences. Faculry ofPiwrmacy. Uni••ersi(l' of

Pnrro, RuaJorge Virerbo Ferreira. 2211. 4050-313 Porro. Por·wgal

The Northeast of Portugal is among the European regions with high divers ity of wild mushrooms, some with recognized gastronomic value. Due to the high resemblance among mushroom species belonging to the same genus, finding a distinctive chemometric marker to identify mushroom species is a mandatory task. The lipidic fraction of a natural produc t has a characteristic pattern of triaeylglyccrol (TAG), comprising specific information due to the genetic control of the stereospecific distribution of fatty acids (FA) on the glycerol molecule, which is typical for each speciesfiJ princ ipal component analysis (PCA) was previously applied to classify mushroom samples according to their fatty acids profile .121

However, despite TAG profi le was used before to assess the authentic ity of oils,l31 it was not used as taxonomical marker.Accordingly, TAG profile was evaluated in 30 wild mushroom species and the results were classified by PCA to identify their discriminant ability. TAG profiles obtained by high performance liquid chromatography coupled to an evaporative light scattering detector showed significant differences among species. The PCA biplot (1) showed that TAG profiles recorded for different mushroom genera may be used as an effective differentiating tool, especially when lowering the taxonomical rank, indicating that TAG profile is most related with the lowest ranks. Ln conclusion, this chcmometrie approach might be used as a practiealloolto identify mushroom species.

' rn-u1o} 1 d•.••• l

Acknowletlgmews: Awhors are grateful to Frmda(·iio para a Ciencia e a Tecrrologia (FC1: Portugal) and COMPETE!QRENIEU j(w financial support to this work (research project P7DCIAGR-ALI/11006212009), to C!MO (strategic project PE,t-0 1:.'/AGR/U/069012011) and to REQUIMTE (PE<r-CIEQBILA0006/2011). J.C.M. /Jarreira tlranks FC7: POPli-QRF:N and Fwrdu Social Europeufor Iris gram (SFRJJ/BPD/72802/2010).

References f t ] Buchgraber, M.: Utberth. F.; Emons. H.: Anklam, E. £ ur. J. Lipid Sci. Teclr. 2004, 106, 62 I. [2] Marekov, 1. ; Momchitova, S.; Grung, B.; Nikolova-Damyanova, U. J Clmnnarogr. (fJ) 20t 2, 910. 54.

[3] Rumbaut. R.: De Clercq, N.; f o ubcrt, 1.; Dcweu inck. K . ./.Am. Uil Clrem. Soc. 2009,86, 19.

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