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| Author(s): |
Nídia Cristiane Yoshida
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) |
| Defense date: | 2013-09-20 |
| Examining board members: |
Massuo Jorge Kato;
Ian Castro Gamboa;
Walmir Silva Garcez;
Sayuri Miyamoto;
Luciana Gonzaga de Oliveira
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| Advisor: | Massuo Jorge Kato |
| Abstract | |
The phylogenetic analysis and reconstruction of chemical characters in Piper species distinguished clades specialized in the production of benzoic acids/chromenes, amides and lignoids. The chemical profiles of these species were determined by analysis of crude extracts by 1H NMR combined with principal component analysis (PCA). It is remarkable that lignans of dibenzylbutyrolactone and furofurans type occur in Macrostachys while Schilleria contains dimers of propenylphenols such as tetrahydrofurans lignans and benzofuran neolignans. Piper solmsianum specimens collected from distinct sites showed differences in their morphology and chemical profiles. The assessment of chemical and genetic variability by PCA and microsatellites, respectively, indicated the segregation of populations according to the sampling site and pointed out to the potential use for the combined approaches to distinguish P. solmsianum specimens. The sequences of the genes acetyltransferase, propenylphenol synthase and dirigent protein provided the first information about the genes involved in the biosynthesis of lignans/phenylpropanoids in P. solmsianum. (AU) | |
| FAPESP's process: | 08/58877-7 - Phylogenetic analyses and study of phenylpropanoid metabolism in Piper species |
| Grantee: | Nidia Cristiane Yoshida |
| Support Opportunities: | Scholarships in Brazil - Doctorate |