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Mitochondrial Data In Monocot Phylologenetics, Gitte Peterson, Ole Seberg, Jerrold I. Davis, Douglas H. Goldman, Dennis W. Stevenson, Lisa M. Campbell, Fabian A. Michaelangeli, Chelsea D. Specht, Mark W. Chase, Michael E. Fay, J. Chris Pires, John V. Freudenstein, Christopher R. Hardy, Mark P. Simmons
Mitochondrial Data In Monocot Phylologenetics, Gitte Peterson, Ole Seberg, Jerrold I. Davis, Douglas H. Goldman, Dennis W. Stevenson, Lisa M. Campbell, Fabian A. Michaelangeli, Chelsea D. Specht, Mark W. Chase, Michael E. Fay, J. Chris Pires, John V. Freudenstein, Christopher R. Hardy, Mark P. Simmons
Aliso: A Journal of Systematic and Floristic Botany
Mitochondrial sequences are an important source of data in animal phylogenetics, equivalent in importance to plastid sequences in plants. However, in recent years plant systematists have begun exploring the mitochondrial genome as a source of phylogenetically useful characters. The plant mitochondrial genome is renowned for its variability in size, structure, and gene organization, but this need not be of concern for the application of sequence data in phylogenetics. However, the incorporation of reverse transcribed mitochondrial genes ("processed paralogs") and the recurring transfer of genes from the mitochondrion to the nucleus are evolutionary events that must be taken into account. RNA …
Fleshy Fruits In Liliflorous Monocots, Finn N. Rasmussen, Signe Frederikson, Bo Johansen, Lise Bolt Jørgenson, Gitte Peterson
Fleshy Fruits In Liliflorous Monocots, Finn N. Rasmussen, Signe Frederikson, Bo Johansen, Lise Bolt Jørgenson, Gitte Peterson
Aliso: A Journal of Systematic and Floristic Botany
Fleshy fruits occur in several monocot orders and families, and it is generally assumed that they have been derived from capsular fruits many times during the evolution of monocot lineages. Huber hypothesized in 1969 that most capsules in Asparagales are derived secondarily from berries and that this transformation was correlated with the evolution of phytomelan-coated seeds, a pivotal character in his circumscription of Asparagales as part of reclassifying Liliaceae s.l. Dahlgren and co-workers suggested several parallel derivations and "reversals" in this character, e.g., the transformation sequence trifollicular fruits → capsules → berries→ capsules→ berries. Mapping of fleshy fruits on a …
The Operculum In Pollen Of Monocotyledons, Carol A. Furness, Paula J. Rudall
The Operculum In Pollen Of Monocotyledons, Carol A. Furness, Paula J. Rudall
Aliso: A Journal of Systematic and Floristic Botany
Within monocotyledons, monosulcate pollen is the predominant type and probably represents the plesiomorphic condition, but considerable variation occurs in sulcus morphology. An operculum is an exine thickening that covers most of an aperture. Monocot opercula are usually associated with sulci, although they can occur in ulcerate apertures, as in Poaceae. There are several other aperture types closely related to the monosulcate-operculate type, and confusion occurs in the palynological literature between monosulcate-operculate, pontoperculate, disulculate, disulcate, and zona-aperturate (zonasulculate or zonasulcate) pollen. Transmission electron microscopy (TEM) was used to determine the distribution of the thick apertural intine and to accurately identify these …
A Reappraisal Of Phylogentic Relationships In The Monocotyledon Family Hydrocharitaceae (Alismatidae), Donald H. Les, Michael L. Moody, Connie L. Soros
A Reappraisal Of Phylogentic Relationships In The Monocotyledon Family Hydrocharitaceae (Alismatidae), Donald H. Les, Michael L. Moody, Connie L. Soros
Aliso: A Journal of Systematic and Floristic Botany
The diverse, aquatic Hydrocharitaceae have defied stable classification for nearly two centuries. Anatomical and morphological convergence characterize many aquatic plants and undoubtedly have hindered the ability of researchers to ascertain accurately those features representing reliable phylogenetic markers within Hydrocharitaceae. Most prior classifications of the family have emphasized few characters to define major taxonomic subdivisions (i.e., they were highly artificial). Previous studies using molecular data have shown that DNA sequences provide novel indications of phylogeny not indicated previously by morphologically based classifications; however, they have not yet recommended alterations to the classification for the family. We conducted a more comprehensive phylogenetic …
The Never-Ending Story: Multigene Approaches To The Phylogeny Of Amaryllidaceae, Alan W. Meerow, Deirdre A. Snuman
The Never-Ending Story: Multigene Approaches To The Phylogeny Of Amaryllidaceae, Alan W. Meerow, Deirdre A. Snuman
Aliso: A Journal of Systematic and Floristic Botany
a whole, strongly supported the mostly African tribe Amaryllideae as sister to the rest of the family, and resolved geographically-based monophyletic groups, but failed to resolve the relationships among several basal lineages in the family (the African Haemantheae and Cyrtantheae, the Australasian Calostemmateae, and the American and Eurasian sister clades). We present analysis of plastid ndhF sequences that fully resolved the major clades of the family. The baccate-fruited Haemantheae and Calostemmateae are sister tribes, and the African endemic Cyrtantheae is sister to them both. This clade is sister to an American/Eurasian clade. We also present preliminary nuclear ribosomal ITS …