Showing papers by "Jeffrey D. Palmer published in 1993"
TL;DR: Congruence among multiple lines of evidence strongly suggests, in contrast to traditional and current classification, that animals and fungi are sister groups while plants constitute an independent evolutionary lineage.
Abstract: Phylogenetic relationships among plants, animals, and fungi were examined by using sequences from 25 proteins. Four insertions/deletions were found that are shared by two of the three taxonomic groups in question, and all four are uniquely shared by animals and fungi relative to plants, protists, and bacteria. These include a 12-amino acid insertion in translation elongation factor 1 alpha and three small gaps in enolase. Maximum-parsimony trees were constructed from published data for four of the most broadly sequenced of the 25 proteins, actin, alpha-tubulin, beta-tubulin, and elongation factor 1 alpha, with the latter supplemented by three new outgroup sequences. All four proteins place animals and fungi together as a monophyletic group to the exclusion of plants and a broad diversity of protists. In all cases, bootstrap analyses show no support for either an animal-plant or fungal-plant clade. This congruence among multiple lines of evidence strongly suggests, in contrast to traditional and current classification, that animals and fungi are sister groups while plants constitute an independent evolutionary lineage.
527 citations
TL;DR: A parsimony analysis of 156 representative sequences of the Asteridae sensu lato and 28 outgroup sequences was conducted using a two-tiered approach, designed to discover multiple islands of equal parsimony using the heuristic search routine in PAUP.
Abstract: A parsimony analysis of 156 representative sequences of the Asteridae sensu lato and 28 outgroup sequences was conducted using a two-tiered approach. First, an analysis of the entire group, including 105 sequences, examined relationships among major lineages within the Asteridae s.l.; subsequently, several clades within the larger group were examined individually in greater detail by including more sequences for the group in question. The search strategy was designed to discover multiple islands of equal parsimony using the heuristic search routine in PAUP. In the broad search and in each more detailed search of subclades, multiple islands were found that imply substantially different relationships
337 citations
TL;DR: Parsimony analyses of DNA sequence data from the chloroplast rbcL gene were used to assess the circumscription and phylogenetic position of the Geraniaceae, generic relationships within the family, and the affinities of the families previously assigned to the order Geraniales.
Abstract: Parsimony analyses of DNA sequence data from the chloroplast rbcL gene were used to assess the circumscription and phylogenetic position of the Geraniaceae, generic relationships within the family, and the affinities of the families previously assigned to the order Geraniales. The other families placed in the Geraniales in recent higher-order classifications fall into four well separated lineages, none of which appears to be closely related to the Geraniaceae. Only Hypseocharis, often included in the Oxalidaceae, receives strong support as a close relative to the monophyletic Geraniaceae sens. str., as suggested by Boesewinkel on the basis of seed anatomy
113 citations
TL;DR: The restriction-site and inversion data yield congruent trees, indicating that the giant lobelias from around the world are derived from diploid herbaceous ancestors.
Abstract: Phylogenetic relationships among 16 species of Lobelia and single representatives of Monopsis and Sclerotheca (Lobeliaceae) were assessed by mapping restriction sites and major structural rearrangements (deletions and inversions) in the large single-copy region of the chloroplast genome. Eleven inversions and five different gene arrangements were found. A deletion involving 0RF5 12 is associated with many of the inversions, and all inversion endpoints are located in intergenic spacer regions. Analysis of 132 phylogenetically informative restriction sites produced three equally parsimonious trees of 2 19 steps, with a consistency index of 0.60. The restriction-site and inversion data yield congruent trees, indicating that the giant lobelias from around the world are derived from diploid herbaceous ancestors. The giant lobelias consist of a Chilean hexaploid group and a pantropical tetraploid group. The woody genus Sclerotheca is clearly derived from a giant Lobelia ancestor, while the herbaceous Monopsis is probably derived from herbaceous lobelias. The giant lobelias from eastern Africa are weakly supported as monophyletic with the inclusion of the Brazilian L. organensis. Relationships among the Pacific and Asian giant lobelias are not fully resolved and await more detailed study.
83 citations
TL;DR: The results clearly distance from the Asteraceae certain groups previously considered closely related; moreover, the results support alternative hypotheses of affinity that were based upon floral and inflorescence morphology, biogeography, pollen morphology, chemistry, and pollen-presentation mechanisms.
Abstract: Nucleotide sequences of the chloroplast gene rbcL were analyzed to examine relationships among the large, distinctive family Asteraceae and eight putatively closely related families. Phylogenetic analysis of a total of 24 sequences of rbcL identified a lineage consisting of two families, the Goodeniaceae and Calyceraceae, as the sister group to the Asteraceae. In addition, a strongly supported major monophyletic clade consisting of Asteraceae, Goodeniaceae, Calyceraceae, Corokia (Cornaceae sensu Cronquist), Menyanthaceae, Lobeliaceae, and Campanulaceae was found. These results clearly distance from the Asteraceae certain groups previously considered closely related; moreover, the results support alternative hypotheses of affinity that were based upon floral and inflorescence morphology, biogeography, pollen morphology, chemistry, and pollen-presentation mechanisms
55 citations
46 citations
TL;DR: The deduced amino-acid sequence of this gene shows considerable similarity to mitochondrially encoded NAD 6 proteins of other organisms as well as to NAD6 proteins coded for by plant chloroplast DNAs.
Abstract: We have isolated the Brassica campestris mitochondrial gene nad6, coding for subunit six of NADH dehydrogenase. The deduced amino-acid sequence of this gene shows considerable similarity to mitochondrially encoded NAD6 proteins of other organisms as well as to NAD6 proteins coded for by plant chloroplast DNAs. The B. campestris nad6 gene appears to lack introns and produces and abundant transcript which is comparable in size to a previously described, unidentified transcript (#18) mapped to the B. campestris mitochondrial genome. An alignment of NAD6 proteins (deduced from DNA sequences) suggests that B. campestris nad6 transcripts are edited. Southern-blot hybridization indicates that nad6 is present in the mitochondrial genome of all of a wide range of flowering plant species examined.
13 citations