Search
Search Results
-
Phylogenetic relationships among ferns and gymnosperms; an overview
Ferns and gymnosperms are two of the most important traditionally recognized groups of vascular plants, but both are unnatural when viewed in terms...
-
The evolutionary origin of red algae as deduced from the nuclear genes encoding cytosolic and chloroplast glyceraldehyde-3-phosphate dehydrogenases from Chondrus crispus
Algae are a heterogeneous group of photosynthetic eukaryotes traditionally separated into three major subdivisions: rhodophytes, chlorophytes, and...
-
Chloroplast DNA restriction site polymorphism inGenisteae (Leguminosae) suggests a common origin for European and American lupines
Restriction site polymorphism in cpDNA of 35 legumes was studied in order to address natural relationships and geographic distribution within the...
-
Non-coding chloroplast DNA for plant molecular systematics at the infrageneric level
With primers constructed against highly conserved regions of tRNA genes (trnT UGU, trnL UAA and trnF...
-
Secondary structure and phylogeny of the chloroplast 23S rRNA gene from the brown alga Pylaiella littoralis
The entire nucleotide sequence of a 23S rRNA gene from the brown alga Pylaiella littoralis (L.) Kjellm has been determined. The predicted length of...
-
Introduction
The angiosperms are the largest, most highly diversified, and most successful major group of land plants. They contain an estimated 225000 to 350000...
-
Molecular phylogenies of plastid origins and algal evolution
An overview of recent molecular analyses regarding origins of plastids in algal lineages is presented. Since different phylogenetic analyses can...
-
Reconstruction of the phylogeny of the genus Triticum from variation in repeated nucleotide sequences
The potential of variation in repeated nucleotide sequences as a tool for phylogenetic studies was examined by investigating the phylogeny of 13...
-
A phylogenetic analysis of chloroplast DNA restriction site variation inPoaceae subfam.Pooideae
A phylogenetic analysis was conducted on chloroplast DNA restriction site variation in 34 genera of grasses (family Poaceae ), including 28 genera from...
-
Chromosome numbers in callirhoe (Malvaceae)
Forty-four chromosome counts from the North American genus Callirhoe are reported, including first-recorded counts of C. alcaeoides, C. digitata, C....
-
Evolution of mushroom mitochondrial DNA:Suillus and related genera
Map** studies were performed with 18 cloned probes on mitochondrial DNA (mtDNA) from 15 species of Suillus and four species from three related...
-
Clonal Niche Organization in Triploid Parthenogenetic Trichoniscus pusillus: A Comparison of Two Kinds of Microevolutionary Events
The phenomenon of parthenogenesis confronts current neo-Darwinistic thought with two major paradoxes. The so-called cost of sex implies that through...
-
Relationships ofLomatium among other genera ofApiaceae
Lomatium is the largest North American genus of Apiaceae (= Umbelliferae ). Relations among Lomatium and other genera have not been well understood. The Apiaceae-Araliaceae...
-
A botanical critique of cladism
Clade versus grade is an old question in taxonomy, going back as far as Darwin himself. Taxonomists have long believed that both must be taken into...
-
Stigma structure and variation in Bromeliaceae—Neglected taxonomic characters
Three distinct types of stigma architecture, designated as “simple-erect,” “conduplicate-spiral”, and “convolute-blade” were identified for...
-
Satellited chromosomes, systematics and phylogeny inTaraxacum (Asteraceae)
A survey is made of the occurrence, nature and frequency of satellited chromosomes in the agamospermous genus Taraxacum. Species belonging to the 10...
-
The Prochlorophytes
Prochlorophytes (Lewin, 1976) are phototrophic prokaryotes that contain chlorophylls a and b and are capable of evolving oxygen when suitably...
-
Systematics and Evolution of Seed Plants
The main developments in systematics in the past two years have taken different directions. Firstly, the evolution of angiosperms documented by the...
-
Some Aspects of the Classification and Evolution of Higher Taxa
It is shown that a fully phylogenetic classification of the flowering plants, though not impossible in principle, is hard to attain at present...
-
Early cretaceous fossil evidence for angiosperm evolution
Morphological, stratigraphic, and sedimentological analyses of Early Cretaceous pollen and leaf sequences, especially from the Potomac Group of the...