Chemotaxonomic study

Hathaway, W., Reichert, T. and Linhart, Y. B. 1967a. Chemotaxonomic study of Pinus... 

As noted with the chemotaxonomic studies, the limited resolving power and mass accuracy of MALDI-TOF complicates identification of unknown proteins. If the greatly improved resolving power and accuracy of MALDI-FTMS can be used to monitor overexpressed proteins, it could have significant advantages. Figure 13.12 is a MALDI-FTMS spectrum of E. coli whole cells that have been genetically altered to produce the soluble core domain mammalian cytochrome b5 protein, which consists of 98 amino acids. 

Reiner, E. Ewing, W. J. Chemotaxonomic studies of some Gram-negative bacteria by means of pyrolysis gas-liquid chromatography. Nature 1968,217,191-194. 

Lawi-Berger, C. and I. Kapetanidis. Chemotaxonomic study of cannabis (Cannabaceae). Part 2. Quantitative analysis of fatty acids in hemp seeds of Cannabis sativa L. Pharm Acta Helv 1983 58(3) 79-81. 

Grayer, R. et al.. The application of atmospheric pressure chemical ionisation liquid chromatography-mass spectrometry in the chemotaxonomic study of flavonoids characterisation of flavonoids from Ocimum gratissimum var. gratissimum, Phytochem. Anal., 11, 257, 2000. 

Tanaka, N. et al.. Chemical and chemotaxonomical studies of ferns. LXXXIII. Constituent variation of Microlepia marginata (1), Yakugaku Zasshi, 113, 70, 1993. 

Masuda M, Abe T, Suzuki T, Suzuki M (1996) Morphological and Chemotaxonomic Studies on Laurencia composita and L. okamurae (Ceramiales, Rhodophyta). Phycologia 35 650... 

Amino acids of Hymenolepis palmarum (John, 1956) and chemotaxonomic studies on hymenolepidid cestodes. Journal of Helminthology, 59 39-42. 

Muckensturm, B., Foechterlen, D., Reduron, J.-P., Danton, P. and Hildenbrand, M. (1997) Phytochemical and chemotaxonomic studies of Foeniculum vulgare. Biochemical Systematics and Ecology 25(4), 353-358. 

A chemotaxonomic study of the pyrrolizidine alkaloids present in the subfamilies Heliotropioideae and Boraginoideae has been carried out, using t.l.c.19 No alkaloids were identified. Lycopsamine (41) and 9-angelylretronecine have been isolated from Messerschmidia sibirica.20 9-Angelylretronecine has only been found previously in Bhesa archboldiana (Celastraceae).21 Heliotrine A-oxide is present in Heliotropium ramosissimum.22 A full paper describing the alkaloids identified in H. curassavicum... 

Many chemotaxonomic studies have been published that consists of lists of phytochemical data, but a significant number of studies are now appearing that probe such questions as the genetics of terpenoid formation, hybridization and clonal variation, and biochemical evolution. Reviews have appeared on the chemotaxonomy of flowering plants,435 and of terpenoid formation in particular,436 on chemistry in botanical classification,437 on leaf oils of conifers,438 and on biochemical evolution in plants 439 the last named is comprehensive and quite outstanding. 

ABSTRACT Monoterpenoids are the components of essential oils, which are produced and accumulated, in large amounts by plants from certain families, including Labiatae, Pinaceae, Cupressaceae, Umbelliferae and Rutaceae. They are of special interest because of their industrial applications and on account of their chemical properties and biological activity. Monoterpenic composition can be useful in genetic and chemotaxonomic studies of coniferous species. 

Thirty-three known iridoid and secoiridoid glucosides have been analysed by gas chromatography of their trimethylsilyl derivatives. G.c.-m.s. analysis of several representative compounds e.g. 4-CO2H, 4-C02Me, 4-unsubstituted) demonstrated the feasibility of iridoid-containing plant extract analysis and resulted in the identification of secologanoside 11-methyl ester (99 R = H, X = CH2) from Lonicera morrowii the sixth paper in a series of chemotaxonomic studies on iridoids illustrates the need for accurate analysis of minor components. ... 

The early chemotaxonomic studies of Erdtman (1952) showed that the heartwood of pines contained flavonoid (Ce-Cs-Ce) and stilbene (C6-C2-Ce) compounds, which could aid species identification. Although the two sections of the pine genus, Haploxylon and Diploxylon, both contain the stilbenes pinosylvin and pinosylvin monomethyl ether, the groups can be distinguished since the Diploxylon group (pines with two or three needles per cluster) contains only flavanones whereas... 

The Kaurane-Phyllocladane Series.— There have been several chemotaxonomic studies on the distribution of diterpene hydrocarbons amongst the Podocar-paceae, Sciadopityaceae, and Taxodiaceae. A more detailed study of eighty-four specimens of Cryptomeria japonica reveals an infra-species variation in hydrocarbon production. Thus although sixty-six trees produced (—)-kaurene, nine produced phyllocladene of the opposite stereochemical series. Indeed, even trees from the same seed source were not uniform in their hydrocarbon production. This paper also records a warning of the facile isomerisation of kaurene and phyllocladene into their A -isomers. 

The synthesis of caffeoylcholine and other caffeine derivatives has been carried out for the purpose of pharmacological activity and chemotaxonomic studies in relation to components isolated from Cleome pungens,17... 

In view of the tremendous progress in the investigation of the alkaloids of the plant family Papaveraceae, it seemed desirable to bring up to date the chapters dealing with this problem which were published earlier in this series. In this connection, mention should be made that sufficient data have been accumulated to make it profitable to undertake bio-genetic and chemotaxonomic studies. 

A chemotaxonomic study [65] on H. perforatum populations from Italy revealed the existence of a chemotype characterized by the absence of rutin. Our investigation of the chemical profile of St. John s Wort plants collected in various localities in South Italy [66,67] also confirms the presence of a specific chemical race which does not produce rutin. However, in those studies, a possible correlation between the content of rutin and the altitude was not looked for. 

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