Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira

F T Gananca, J P Charpentier, M A A P de Carvalho, D Thangadurai, C Joseph, E Franco, N Sousa, C C Wilcock, C Jay-Allemand, T M M dos Santos

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thirty-five randomly-collected Semele androgyna Kunth samples were screened by RP-HPLC for their phenolic composition. Fraction analysis allowed the detection of 17 different compounds. According to their retention times and UV spectra obtained by diode array analysis, these phenolics represent three classes: phenolic acids, flavones and flavonols. Co-chromatography with specific standards enabled identification of quercetin, rutin and quercitrin in Semele tissues for the first time. Polymorphism based on phenolic composition was evaluated using multivariate analysis and showed four distinct S. androgyna clusters. This polymorphism was not associated with morphological diversity or different in ambient light intensities. Biochemical differentiation is thus present in this species. The application of multivariate analysis techniques to RP-HPLC data has allowed the classification of samples into two groups, previously proposed on the basis of morphological and cytotaxonomical information. Therefore, the use of phenolics as chemotaxonomic markers in Semele is highly recommended because of its diagnostic value, even at a subspecies level. Discriminant canonical analysis and Mahalanobis distances confirmed these clusters as recognisable chemosystematic units. However, these units do not support the separation of S. pterygophora.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalSouth African Journal of Botany
Volume71
Publication statusPublished - 2005

Keywords

  • GLYCOSIDES
  • CULTIVARS
  • TAXA

Cite this

Gananca, F. T., Charpentier, J. P., de Carvalho, M. A. A. P., Thangadurai, D., Joseph, C., Franco, E., ... dos Santos, T. M. M. (2005). Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira. South African Journal of Botany, 71, 160-166.

Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira. / Gananca, F T ; Charpentier, J P ; de Carvalho, M A A P ; Thangadurai, D ; Joseph, C ; Franco, E ; Sousa, N ; Wilcock, C C ; Jay-Allemand, C ; dos Santos, T M M .

In: South African Journal of Botany, Vol. 71, 2005, p. 160-166.

Research output: Contribution to journalArticle

Gananca, FT, Charpentier, JP, de Carvalho, MAAP, Thangadurai, D, Joseph, C, Franco, E, Sousa, N, Wilcock, CC, Jay-Allemand, C & dos Santos, TMM 2005, 'Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira', South African Journal of Botany, vol. 71, pp. 160-166.
Gananca FT, Charpentier JP, de Carvalho MAAP, Thangadurai D, Joseph C, Franco E et al. Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira. South African Journal of Botany. 2005;71:160-166.
Gananca, F T ; Charpentier, J P ; de Carvalho, M A A P ; Thangadurai, D ; Joseph, C ; Franco, E ; Sousa, N ; Wilcock, C C ; Jay-Allemand, C ; dos Santos, T M M . / Flavonoids in phylloclades discriminate endemic Semele androgyna chemotypes from Madeira. In: South African Journal of Botany. 2005 ; Vol. 71. pp. 160-166.
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AU - Gananca, F T

AU - Charpentier, J P

AU - de Carvalho, M A A P

AU - Thangadurai, D

AU - Joseph, C

AU - Franco, E

AU - Sousa, N

AU - Wilcock, C C

AU - Jay-Allemand, C

AU - dos Santos, T M M

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N2 - Thirty-five randomly-collected Semele androgyna Kunth samples were screened by RP-HPLC for their phenolic composition. Fraction analysis allowed the detection of 17 different compounds. According to their retention times and UV spectra obtained by diode array analysis, these phenolics represent three classes: phenolic acids, flavones and flavonols. Co-chromatography with specific standards enabled identification of quercetin, rutin and quercitrin in Semele tissues for the first time. Polymorphism based on phenolic composition was evaluated using multivariate analysis and showed four distinct S. androgyna clusters. This polymorphism was not associated with morphological diversity or different in ambient light intensities. Biochemical differentiation is thus present in this species. The application of multivariate analysis techniques to RP-HPLC data has allowed the classification of samples into two groups, previously proposed on the basis of morphological and cytotaxonomical information. Therefore, the use of phenolics as chemotaxonomic markers in Semele is highly recommended because of its diagnostic value, even at a subspecies level. Discriminant canonical analysis and Mahalanobis distances confirmed these clusters as recognisable chemosystematic units. However, these units do not support the separation of S. pterygophora.

AB - Thirty-five randomly-collected Semele androgyna Kunth samples were screened by RP-HPLC for their phenolic composition. Fraction analysis allowed the detection of 17 different compounds. According to their retention times and UV spectra obtained by diode array analysis, these phenolics represent three classes: phenolic acids, flavones and flavonols. Co-chromatography with specific standards enabled identification of quercetin, rutin and quercitrin in Semele tissues for the first time. Polymorphism based on phenolic composition was evaluated using multivariate analysis and showed four distinct S. androgyna clusters. This polymorphism was not associated with morphological diversity or different in ambient light intensities. Biochemical differentiation is thus present in this species. The application of multivariate analysis techniques to RP-HPLC data has allowed the classification of samples into two groups, previously proposed on the basis of morphological and cytotaxonomical information. Therefore, the use of phenolics as chemotaxonomic markers in Semele is highly recommended because of its diagnostic value, even at a subspecies level. Discriminant canonical analysis and Mahalanobis distances confirmed these clusters as recognisable chemosystematic units. However, these units do not support the separation of S. pterygophora.

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