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Chemotaxonomical identification of spores of macrofungi: possibilities of Raman spectroscopy

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Abstract

Confocal Raman spectroscopy is a non-destructive analytical method which is useful to obtain detailed information about the molecular composition of biological samples. Its high spatial resolution was used to collect spectra of single basidiospores of macrofungi of the genera Collybia, Gymnopus, Laccaria, Lactarius, Mycena and Russula. These spectra can be divided into three major taxon-related groups, with general compositional differences, such as the relative amount of lipids compared to proteins. In this study, collapsing of thin-walled spores during storage was often observed, a phenomenon which has been given little attention in the literature. The Raman spectra are treated with different chemometric preprocessing techniques, including Savitsky–Golay, standard normal variate (SNV) preprocessing and extended multiplicative scatter correction (EMSC). By using linear discriminant analysis, approximately 90% of the spectra can be assigned to the correct genus, but identification on the species level was not possible.

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Acknowledgements

The authors greatly acknowledge the financial support of the Research Foundation Flanders (FWO-Vlaanderen). Kris De Gussem, PhD fellow of the Research Foundation - Flanders, and Peter Vandenabeele, Postdoctoral fellow of the Research Foundation - Flanders, thank this organisation for their PhD and postdoctoral grants respectively.

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Correspondence to Peter Vandenabeele.

Appendix: studied material

Appendix: studied material

Collybia dryophylla: Belgium, Wachtebeke, Heidebos, IFBL: C3.35.41, 1 Oct 2005, KDG 200537

Collybia dryophylla: ibid., KDG 200533

Collybia erythropus: ibid., KDG 200536

Collybia maculata: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200522

Collybia peronata: Belgium, Wachtebeke, Heidebos, IFBL: C3.35.41, 1 Oct 2005, KDG 200530

Collybia peronata: ibid., KDG 200531

Collybia peronata: ibid., KDG 200532

Collybia peronata: Belgium, Merelbeke, Prov. domein Gentbos, IFBL: D3.43.13, 8 Oct 2005, KDG 200551

Gymnopus brassicolens: Belgium, Wachtebeke, Heidebos, IFBL: C3.35.41, 1 Oct 2005, KDG 200538

Laccaria amethystea: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200519

Laccaria amethystea: ibid., KDG 200520

Laccaria laccata: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 22 Oct 2005, KDG 200578

Laccaria proxima: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200518

Lactarius blennius: Belgium, Wingene, D2.13.22, 11 Oct 2005, KDG 200558

Lactarius camphoratus: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200521

Lactarius controversus: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 9 Aug 2005, KDG 200507

Lactarius controversus: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 24 Aug 2005, KDG 200517

Lactarius controversus: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 6 Oct 2005, KDG 200540

Lactarius deterrimus: Belgium, Hautes Fagnes, Rés. for. Ruhrbush (Bütgenbach/Elsenborn), IFBL: H6.28.44, 16 Oct 2005, KDG 200569

Lactarius lacunarum: Belgium, Wingene, D2.13.22, 11 Oct 2005, KDG 200560

Lactarius lacunarum: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 24 Aug 2005, KDG 200576

Lactarius plumbeus: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200527

Lactarius pubescens: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 6 Oct 2005, KDG 200543

Lactarius pubescens: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 24 Oct 2005, KDG 200583

Lactarius quietus: Belgium, Wingene, D2.13.22, 11 Oct 2005, KDG 200557

Lactarius quietus: Belgium, Heure, Vallée Ruisseau du Trou du Loup, H6.36.23, 14 Oct 2005, KDG 200561

Lactarius quietus: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 22 Oct 2005, KDG 200581

Lactarius rufus: Belgium, Temse, Fort van Steendorp, C4.54.11, 9 Oct 2005, KDG 200554

Lactarius tabidus: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200526

Lactarius tabidus: Belgium, Merelbeke, Prov. domein Gentbos, IFBL: D3.43.13, 8 Oct 2005, KDG 200548

Lactarius vellereus: Belgium, Hautes Fagnes, Rés. for. Ruhrbush (Bütgenbach/Elsenborn), IFBL: H6.28.44, 16 Oct 2005, KDG 200574

Mycena galopus: Belgium, Wachtebeke, Heidebos, IFBL: C3.35.41, 1 Oct 2005, KDG 200534

Mycena pura: Belgium, Merelbeke, Prov. domein Gentbos, IFBL: D3.43.13, 8 Oct 2005, KDG 200547

Mycena pura: Belgium, Hautes Fagnes, Rés. for. Ruhrbush (Bütgenbach/Elsenborn), IFBL: H6.28.44, 16 Oct 2005, KDG 2005–68

Russula aeruginea: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 6 Oct 2005, KDG 200545

Russula cfr. aeruginea: Belgium, Temse, Fort van Steendorp, C4.54.11, 16 Aug 2005, KDG 200510

Russula delica: Belgium, Tervuren, E4.38.42, 7 Aug 2005, KDG 200501

Russula exalbicans: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 22 Aug 2005, KDG 200512

Russula exalbicans: ibid., KDG 200513

Russula exalbicans: ibid., KDG 200514

Russula exalbicans: ibid., KDG 200515

Russula faginea: Belgium, Tervuren, E4.38.42, 7 Aug 2005, KDG 200503

Russula foetens: ibid., KDG 200504

Russula heterophylla: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 24 Oct 2005, KDG 200579

Russula ochroleuca: Belgium, Wingene, Vagevuurbossen, IFBL: C2.53.44, 20 Sep 2005, KDG 200523

Russula parazurea: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 22 Aug 2005, KDG 200516

Russula versicolor: Belgium, Temse, Fort van Steendorp, C4.54.11, 4 Oct 2005, KDG 200539

Russula versicolor: Belgium, Gent, Univ. Campus De Sterre, IFBL: D3.22.43, 6 Oct 2005, KDG 200541

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De Gussem, K., Vandenabeele, P., Verbeken, A. et al. Chemotaxonomical identification of spores of macrofungi: possibilities of Raman spectroscopy. Anal Bioanal Chem 387, 2823–2832 (2007). https://doi.org/10.1007/s00216-007-1150-1

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