Magnolia grandiflora (Southern Magnolia) is a primitive evergreen tree that has attracted attention because of its horticultural distinctiveness, the wealth of natural products associated with it, and its evolutionary position as a basal angiosperm. Three cDNAs corresponding to terpene synthase (TPS) genes expressed in young leaves were isolated, and the corresponding enzymes were functionally ...

The root of the angiosperm tree has not yet been established. Major morphological and molecular differences between angiosperms and other seed plants have introduced ambiguities and possibly spurious results. Because it is unlikely that extant species more closely related to angiosperms will be discovered, and because relevant fossils will almost certainly not yield molecular data, the use of d...

Late Cretaceous mesofossils are described from the Zliv-?ídká Blana locality in South Bohemian Basins, Czech Republic. Angiosperm remains dominate fossil assemblage both terms of taxonomic diversity and quantitatively, with about 65 different species based on 1,000 specimens flowers, fruits seeds. There surprisingly few nonangiosperm flora, only four assigned to bryophytes, ferns conifers. no m...

Angiosperm sexual systems are fundamental to the evolution and distribution of plant diversity, yet spatiotemporal patterns in angiosperm their drivers remain poorly known. Using data on distributions 68453 species, we present first global maps system frequencies evaluate during Cenozoic. Frequencies dioecy monoecy increase with latitude, while hermaphrodites more frequent warm arid regions. Tr...

Angiosperm mesofossils are described from the Lower Cretaceous Almargem Formation exposed near village of Catefica, Portugal, and thought to be Aptian-early Albian age. The mesofossil assemblage Catefica is diverse and, in addition angiosperms here, also contains a rich non-angiosperm fossils, including leafy axes bryophytes lycopsids, lycopsid salvinialean megaspores, sporangia, sori leaf frag...

Founded in 1991 and published by the Indian Association for Angiosperm Taxonomy (IAAT), Rheedea is an international peer-reviewed journal with four online two print issues per year. The will be March, June, September December while printed June December.

BACKGROUND AND AIMS The amount of DNA in an unreplicated gametic chromosome complement is known as the C-value and is a key biodiversity character of fundamental significance with many practical and predictive uses. Since 1976, Bennett and colleagues have assembled eight compilations of angiosperm C-values for reference purposes and subsequently these have been pooled into the Angiosperm DNA C-...

BACKGROUND Understanding the mode and mechanisms of the evolution of the angiosperm flower is a long-standing and central problem of evolutionary biology and botany. It has essentially remained unsolved, however. In contrast, considerable progress has recently been made in our understanding of the genetic basis of flower development in some extant model species. The knowledge that accumulated t...

Metschnikowia (Saccharomycetales, Metschnikowiaceae/Metschnikowia clade) is an ascomycetous yeast genus whose species are associated mostly with angiosperms and their insect pollinators over all continents. The wide distribution of the genus, its association with angiosperm flowers, and the fact that it includes some of the best-studied yeasts in terms of biogeography and ecology make Metschnik...

We isolated five members of the Aux/IAA gene family in loblolly pine (Pinus taeda L.). Degenerate primers complementary to conserved regions of angiosperm Aux/IAA genes were used to amplify fragments that were, in turn, used as probes to screen a cDNA library constructed from auxin-treated hypocotyls. The five unique clones, named PTIAA1-5, contain the four highly conserved domains that are cha...