By Professor Dr. Otto Richard Gottlieb (auth.)
For numerous many years botanists were inspired by way of the invention that the distribution of secondary plant components follows the final strains of plant relationships. besides the fact that, it quickly turned transparent that little was once to be received from the research of person compounds and their ordinary distribu tion. for this reason, extra finished stories have been test ed during which the secondary chemistry of a big plant workforce was once conscientiously studied and evaluated within the broader context of comparative phytochemistry. Holger Erdtman's admir capable paintings on Coniferae is the key instance of this sort. in view that then, there was an upswing within the examine of the biosynthesis of secondary plant components and it has develop into relatively normal to use biosynthetic wisdom in studying chemosystematic facts. extra over, on the grounds that taxonomists have insisted that use be made up of all almost certainly on hand facts for development classifications, it's been claimed that chemosystematics too should still con sider the entire array of materials found in an incredible taxon. even though, in perform it has proved tough to make use of absolutely the possibility of typical product chemistry and biosynthetic reports for plant systematics and evolution, simply because bota nists stumbled on themselves fairly disorientated by way of the scattered, usually not often available chemical literature and the truth that the chemical facts was once tough for them to guage! even if the pioneering paintings of E. C.
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Extra info for Micromolecular Evolution, Systematics and Ecology: An Essay into a Novel Botanical Discipline
Sample text
Intense structural variation, however, characterizes only the Ranunculiflorae. Here feeble versus strong transformation of these fundamental types differentiates chemically between the orders Ranunculales and Papaverales respectively. 5), almost only in Fumariaceae. 2). Here, apparently as replacement characters, morphine types (codes 31 to 34) suffer the widest structural variation. 2 is of little significance since so few families bear benzylisoquinolines in each case. Keeping this limitation in mind, one is inclined not to assign excessive importance to the similarity of Malviflorae (Rhamnaceae, Euphorbiaceae, Moraceae) to Magnoliiflorae, and of Rutiflorae (Rutaceae, Sapindaceae) to Ranunculiflorae (Papaveraceae), in spite of the closeness of these pairs of superorders on Dahlgren's (1980) graphical representation of the angiosperm system (Fig.
O '- .... \ \ \ I I I I I I I PANDANAlES I CYCLANTHALES , Fig. 3. , 0 ' I , I / "- "- ", I \ I I \ \THYMELAEALE \ I I I I I I I I PANDANALES1 CYCLANTHALES RANUNCULALES NELUMBONALES ANNONALES >--ILUCIALES PIPERALES . ARISTOLO· CHIALES / RAFFLESIALES \ I ARALES I I I~U~ANNIAOLES ALISMATALES I 100 100* 2S SO* 2S 2511" MYRTALES CASUARINALES HAMAMELi DALES TROCHODENDRALES Fig. 4. : PHILYI . RALES () PONTEDERIALES ASPARAGAlES HAEMODORAlES \ 33 33* TRIURIDALESW' HYDROCHARITALEsI ZOSTERALES \ \ \ \ \ H Evolution of Acetate Derivatives 41 Evolution of Acetate Derivatives Besides shikimate derived metabolites, primitive angiosperms also inherited the means to synthesize mevalonate derived metabolites.
2. Lunularic acid, a dihydrostilbene, and abscisic acid, a sesquiterpenoid H 0 lecular systematics. The survey employed The Flavonoids (Harborne et al. 1975) as the basic reference and was supplemented by several additional reviews and reports (Gottlieb 1977a;Markham and Porter 1978;Campbell et al. 1979; Jay et al. 1979; Zinsmeister and Mues 1980), as well as by papers published in Phytochemistry and Biochemical Systematics and Ecology (1975-1979). Chemistry and Systematics Micromolecules formed by condensation of metabolites stemming from the shikimate and polyketide pathways (Fig.