|
Showing 1 - 3 of
3 matches in All Departments
The Caryophyllales are one of the few higher taxa of the flowering
plants ofwhich the size and delimitation against other taxa is
undisputed. However, their derivation from other taxa and the
evolution of families within this order in unsettled. "Systematics
and Evolution of the Caryophyllales" reviews the important
characters of this taxon emphasizing their contribution and
influence towards a new proposal for both the putative origin of
the order and the classification of its families. New results in
molecular genetics, phytochemistry, ultrastructure, and morphology
are provided and discussed in relation to both the classical and
molecular systematics of the order. In addition, characters like
betalains and sieve-element plastids, which have played a major
role in shaping the size of the order, and others like DNA-data or
flower morphologythat can be useful to discuss the position of the
Caryophyllales within higher plants are critically evaluated.
T. J. MABRY and G. W AGENITZ The half-day symposium on
"Multidisciplinary approaches to the systematics of Compositae,"
held as part of the XIV International Botanical Congress in Berlin,
on July 26, 1987, was designed to complement the University of
Reading Compositae Conference (1975). The latter had yielded two
impressive and thorough volumes on "The biology and chemistry of
the Compositae," which were edited by HEYWOOD, HARBORNE &
TURNER (1977). The 1987 Berlin Symposium did not attempt to update
the information from the earlier conference but instead focussed on
selected new methods for investigating the systematics of the
family as well as a few examples of new systematic approaches with
classical methods. From mapping chloroplast DNA restriction sites
JANSEN, PALMER, and MI CHAELS reported the astonishing fact that,
with the exception of one group (the subtribe Barnadesiinae of the
tribe Mutisieae), all investigated other members of Compositae
exhibit a characteristic inversion in their chloroplast DNA,
suggesting that the inversion occurred early in the evolution of
the family and that at least its major part is monophyletic. Within
those groups with the inverted segment, chloroplast DNA also
suggests that most of the conventionally recognized tribes are also
monophyletic. This lends high credit to our predecessors who laid
the foundations for the taxonomic system of the Compositae. These
chloroplast DNA studies have already been published and are not
included here (JANSEN & PALMER 1987, 1988)."
The ftavonoid pigments, one of the most numerous and widespread
groups of natural constituents, are ofimportance and interest to a
wide variety ofphysical and biological scientists and work on their
chemistry, occurrence, natural distribution and biological function
continues unabated. In 1975, a mono graph covering their chemistry
and biochemistry was published by Chapman and Hall under our
editors hip entitled The Flavonoids. The considerable success of
this publication indicated that it filled an important place in the
scientific literature with its comprehensive coverage of these
fascinating and versatile plant substances. The present volume is
intended to update that earlier work and provide a detailed review
of progress in the ftavonoid field during the years 1975 to 1980.
Although cross references are made to The Flavonoids, this
supplement is entirely self-contained and where necessary, tabular
da ta from the earlier volume are incJuded and expanded here. The
choice oftopics in Recent Advances has been dictated by the
developments that have occurred in ftavonoid research since 1975,
so that not all subjects covered in The Flavonoids are reviewed
again here. A major advance in ftavonoid separation has been the
app1ication ofhigh performance liquid chromatography (HPLC) and
this is reviewed inter alia in the opening chapter on separation
techniques. An equally important development in the spectral
analysis of ftavonoids has been the measurement of carbon-13 NMR
spectra and this subject is authoritatively discussed in Chapter 2
and is also illustrated with the spectra of 125 representative
ftavonoids.
|
You may like...
Higher
Michael Buble
CD
(1)
R270
Discovery Miles 2 700
Loot
Nadine Gordimer
Paperback
(2)
R367
R340
Discovery Miles 3 400
|