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Showing 1 to 8 of 8 for “"plant systematics"”.
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Cyclopentenoid Cyanogens: Their Chemistry, Importance in Plant Systematics, and Their Role in the Coevolution of Plants and Insects (Phytochemistry, Cyanogenic, Glycosides, Nmr)
… chemically. Techniques for their isolation from plant sources were devised, and data accumulated on their spectroscopic properties. The distribution of cyclopentenoid cyanogens in plants was investigated, and it was determined that members of the Passifloraceae, Turneraceae, Malesherbiaceae, …
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Expression and Function of the Chloroplast-encoded Gene matK
… a strong phylogenetic signal for resolving plant phylogenies at various taxonomic levels. However, these same features have raised questions as to whether matK produces a functional protein product. matK is the only proposed chloroplast-encoded group II intron maturase. There are 15 genes in …
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Molecular evolution of the RNA polymerase genes and the phylogeny of seed plants
… This project focuses on major groups of seed plants (angiosperms, and four gymnosperms groups: conifers, cycads, Ginkgo and Gnetales). These organisms diverged roughly three hundred million years ago and evolved independently since then. Therefore, morphological characters have limited power …
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The Phylogenetic Reconstruction of the Grass Family (Poaceae) Using matK Gene Sequences
… one is to study the utility of the matK gene in plant evolution. The second objective is to characterize the matK gene in the grass family. The last major goal is to address the phylogenetic questions in the Poaceae using the matK sequences from representatives of different grass groups. In order …
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Systematics of Eastern North American Bracken Fern
The cosmopolitan Pteridium aquilinum (L.) Kuhn is widespread throughout eastern North American, where it is represented primarily by Tryon's (1941) var. latiusculum (Desv.) Underw. and var. pseudocaudatum (Clute) Heller. The taxonomy of Pteridium is controversial. Fourteen isozyme loci and 12 …
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A Systematic Revision of Bakeridesia Hochr. (Malvaceae)
… collected and rapid advances have been made in systematics research techniques. In the process of preparing the first modern taxonomic treatment of Bakeridesia, several approaches were used to investigate its species boundaries and phylogenetic relationships. First, phylogenetic analyses of …
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Reassessment of Species Boundaries and Phylogenetic Relationships in the Desmodium ciliare complex (Fabaceae) Using Morphological and DNA Data
<p><em>Desmodium</em> (Beggar's ticks) is a generally weedy genus of approximately 280 species in the angiosperm family Fabaceae (Subfamily Papilionoideae, Tribe Desmodieae) characterized by indehiscent loments constricted into segments. Within the Southeastern U.S., the <em>Desmodium</em> …
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Towards a systematic analysis and comparison of perianth evolution in Caryophyllineae in the context of the synflorescence
Angiosperm flowers are modified shoots of inter-connected phytomers that bear modified leaves for sexual reproduction. The perianth organs are modified sterile leaves that cover the fertile leaves (i.e. stamens and carpels) in a flower. They have been lost and re-acquired multiple times during …