This paper describes a chemotaxonomic analysis of a database of triterpenoid compounds from the Celastraceae family using principal component analysis (PCA). The numbers of occurrences of thirty types of triterpene skeleton in different tribes of the family were used as variables. The study shows that PCA applied to chemical data can contribute to an intrafamilial classification of Celastraceae, once some questionable taxa affinity was observed, from chemotaxonomic inferences about genera and they are in agreement with the phylogeny previously proposed. The inclusion of Hippocrateaceae within Celastraceae is supported by the triterpene chemistry.
HalléN. (1986) Celastraceae Hipocrateoideae. In: Flore du Gabon (avec compléments pour d'autres pays d'Afrique et Madagascar).MoratP. (Ed.), Muséum National d'Histoire Naturelle, Laboratoire de Phanérogamie, Paris, vol. 29, 1–287.
3.
ThorneRF. (1992) Classification and geography of the flowering plants. The Botanical Review, 58, 225–350.
4.
HeywoodVH. (1993) Flowering Plants of the World.Oxford University Press, New York.
5.
MabberleyDJ. (1993) The Plant-Book: A Portable Dictionary of the Higher Plants. Cambridge University Press, Cambridge.
6.
SimmonsMP, ClevingerCC, SavolainenV, ArcherRH, MathewsS, DoyleJJ. (2001) Phylogeny of the Celastraceae inferred from phytochrome B gene sequence and morphology. American Journal of Botany, 88, 313–325.
7.
SimmonsMP, SavolainenV, ClevingerCC, ArcherRH, DavisJI. (2001) Phylogeny of the Celastraceae inferred from 26S nuclear ribosomal DNA, phytochrome B, rbcL, atpB, and morphology. Molecular Phylogenetics and Evolution, 19, 353–366.
8.
LoesenerT. (1942) Celastraceae In: EnglerA, PrantlK. (Eds) Die Natürlichen Pflanzenfamilien von A. Engler and K. Prantl, zweite stark vermehrte und verbesserte auflauge herausgegeben von Adolf Engler 20b, Duncker & Humblot, Berlin, 87–197.
9.
LoesenerT. (1942) Celastraceae In: EnglerA, PrantlK. (Eds) Die Natürlichen Pflanzenfamilien von A. Engler und K. Prantl, zweite stark vermehrte und verbesserte auflauge herausgegeben von Adolf Engler 20b, Duncker & Humblot, Berlin, 198–231.
10.
HalléN. (1962) Monographie des Hippocratéacées d'Afrique occidentale. Mémoire de l'Institut Français de l'Afrique Noire, 64, 1–245.
11.
CronquistA. (1981) An Integrated System of Classification of Flowering Plants.Columbia University Press, New York.
12.
HouD. (1962) Celastraceae - I. In: van SteenisCGGJ (Ed.) Flora Malesiana vol. 6, Flora Malesiana Found., Leyden, 227–291.
13.
HouD. (1964) Celastraceae - II. In: van SteenisCGGJ (Ed.) Flora Malesiana vol. 6, Flora Malesiana Found., Leyden, 389–421.
14.
TakhtajanAL. (1980) Outline of the classification of flowering plants (Magnoliophyta). The Botanical Review, 46, 225–359.
15.
TakhtajanAL. (1997) Diversity and Classification of Flowering Plants. Columbia University Press, New York.
16.
DahlgrenR. (1983) General aspects of angiosperm evolution and macrosystematics. Nordic Journal of Botany, 3, 119–149.
17.
SimmonsMP, HedinJP. (1999) Relationships and morphological character change among genera of Celastraceae sensu lato (including Hippocrateaceae). Annals of the Missouri Botanical Garden, 86, 723–757.
18.
RobsonN, HalléN, MathewB, BlakelockR. (1994) Celastraceae. In: PohillRM. (ed.), Flora of Tropical East Africa, A.A. Balkema, Rotterdam, 1–78.
19.
SpiveyAC, WestonM, WoodheadS. (2001) Celastraceae sesquiterpenoids: biological activity and synthesis. Chemical Society Reviews, 31, 43–59.
20.
Mesa-SilverioD, ChavezH, Estevez-BraunA, RaveloAG. (2005) Cheiloclines A-I. First examples of octacyclic sesquiterpene-triterpene hetero Diels-Alder aducts. Tetrahedron, 61, 429–436.
21.
GunatilakaAAL. (1996) Triterpenoids quinonemethides and related compounds (Celastroloids) In: HerzW, KirbyGW, MooreRE, SteglichW, TammCh. (Eds.) Fortschritte der Chemie Organischer Naturstoffe – Progress in the Chemistry of Organic Natural Products, Springer-Verlag, New York, 1–114.
22.
AlvarengaSAV, FerreiraMJP, EmerencianoVP, Cabrol-BassD. (2001) Chemosystematic studies of natural compounds isolated from Asteraceae. Characterization of tribes by principal component analysis. Chemometrics and Intelligent Laboratory Systems, 56, 27–37.
23.
GastmansJP, FurlanM, LopesMN, BorgesJHG, EmerencianoVP. (1990) A inteligência artificial aplicada à química de produtos naturais. O programa SISTEMAT. Parte II – Organização do Programa e Aplicativos. Química Nova, 13, 75–80.
24.
EmerencianoVP, RodriguesGV, GastmansJP. (1993) Um método de codificação semi-automático assistido por computador para o SISTEMAT. Química Nova, 16, 431–434.
25.
FerreiraMJP, RodriguesGV, EmerencianoVP. (2001) MONOREG - An expert system for structural elucidation of monoterpenes. Canadian Journal of Chemistry, 79, 1915–1925.
26.
FerreiraMJP, AlvarengaSAV, MacariPAT, RodriguesGV, EmerencianoVP. (2003) A program for terpenoid skeleton prediction based on botanical information. Biochemical Systematics and Ecology, 31, 25–43.
27.
AlvarengaSAV, GastmansJP, FerreiraMJP, RodriguesGV, BrantAJC, EmerencianoVP. (2003) SISTAX - An intelligent tool for recovering information on natural products chemistry. Journal of the Brazilian Chemical Society, 14, 369–374.
28.
AlvarengaSAV, FerreiraMJP, RodriguesGV, EmerencianoVP. (2005) A general survey and some taxonomic implications of diterpenes in the Asteraceae. Botanical Journal of the Linnean Society, 147, 291–308.
WoldS, EsbensenK, GeladiP. (1987) Principal component analysis. Chemometrics and Intelligent Laboratory Systems, 2, 37–52.
31.
FerreiraMJP, BrantAJC, AlvarengaSAV, EmerencianoVP. (2005) Neural networks in chemosystematic studies of Asteraceae: A classification based on dichotomic approach. Chemistry and Biodiversity, 2, 633–644.
32.
EmerencianoVP, Cabrol-BassD, FerreiraMJP, AlvarengaSAV, BrantAJC, ScottiMT, BarbosaKO. (2006) Chemical evolution in the Asteraceae. The oxidation–reduction mechanism and production of secondary metabolites. Natural Product Communications, 1, 495–507.
33.
EmerencianoVP, FerreiraMJP, BarbosaKO, ScottiMT, MagentaM, StefaniR. (2006) Principal component analysis of Heliantheae (Asteraceae) sensu Stuessy and Karis & Ryding based on chemical data. Natural Products: An Indian Journal, 2, 35–44.
34.
LivingstoneD. (1995) Data analysis for Chemists.Oxford Science Publications, New York.
35.
ArcherRH, van WykAE. (1997) A taxonomic revision of Cassine L. s. str. (Cassinoideae: Celastraceae). South African Journal of Botany, 63, 146–157.
36.
ArcherRH, van WykAE. (1992) Palynology and intergeneric relationships in some southern African species of subfamily Cassinoideae (Celastraceae). Grana, 31, 241–252.
37.
ArcherRH, van WykAE. (1993) Bark structure and intergeneric relationships of some Southern African Cassinoideae (Celastraceae). IAWA Journal, 14, 35–53.
38.
ArcherRH, van WykAE. (1993) Wood structure and generic status of some Southern African Cassinoideae (Celastraceae). IAWA Journal, 14, 373–389.
39.
JordaanM, van WykAE. (1999) Systematic studies in subfamily Celastroideae (Celastraceae) in southern Africa: Reinstatement of the genus Gymnosporia. South African Journal of Botany, 65, 177–181.
