Se presenta el estudio taxonómico de la familia Plantaginaceae en los Ándes Centrales, los departamentos de Lima, Huánuco, Ancash, Pasco y Junín. Se realizó colectas entre los 1100 a 4700 m de altitud bajo técnicas estándares de estudios taxónomicos. Además se estudió las colecciones del Herbario San Marcos (USM). Las determinaciones se realizaron empleando claves y descripciones disponible en la literatura especializada. Se reportan 2 géneros, 12 especies; el género más diverso es Plantago con 11 especies con 7 subespecies. Las especies Plantago lamprophylla, y Plantago sericea, Plantago lanceolata, tienen mayor rango altitudinal (entre los 4700 m). De las especies estudiadas en los Andes Centrales, dos son endémicas del Perú. Además se elaboró claves para familias, géneros, especies y sub-especies. Para cada taxón se presenta una descripción detallada y se proporcionan datos de distribución geográfica. Palabras claves: Andes Centrales, Plantagináceas, Plantago, Bougueria y pixidio. / --- It is taxonomic study of the Plantaginaceae family in the Central Andes, the departments of Lima, Huanuco, Ancash, Pasco and Junin. It is presented collections were between 1100 to 4700 m altitude, unsing standard techniques for taxonomicos studies. In addition we studied the collections of the Herbarium San Marcos (USM). The taxonomic studies were made using keys and descriptions available in the literature. We report 2 genera and 12 species, the most diverse genus with 11 species is Plantago with 7 species. The species Plantago lamprophylla, Plantago sericea and Plantago lanceolata, have greater range of altitudinal distribution (up to 4700 m). Of the species studied in the Central Andes, two are endemic to Peru. Also key was developed for families, genera and species. For each taxon presents a detailed and provides geographic data. Keywords: Andes Centrales, Plantagináceas, Plantago, Bougueria y pixidio. / Tesis

Ph.d.

Thesis (M.S.)--University of North Carolina at Greensboro, 2007. / Title from PDF t.p. (viewed Oct. 22, 2007). Directed by Nadja B. Cech; submitted to the Dept. of Chemistry and Biochemistry. Includes bibliographical references (p. 76-79).

arbuscular mycorrhizal infection of seedlings and adults plants Plantago lanceolata was examined at twenty locations with differing moisture and nutrient availability. At each location two control and two fertilized plots were established. Mycorhizal infection of seedlings was higher on control plots but the symbiosis of adult plants degreased with increasing C/N ratio. Mycorrhizal infection was further distinquished into for morfotypes (Acaulospora, Scutellospora, Glomus, fine endophyte.

Mitosis and meiosis of five Plantago species were analyzed. Plantago argyrea, P. patagonica and P. wrightiana contain 2n = 20 chromosomes and P. rhodosperma and P. virginica 2n = 24 chromosomes. Similar modes of evolution of the karyotypes of the 2n = 20 species are suggested. All species are presumed to be tetraploid, arising from 2n = 10 and 2n = 12 ancestors. Structural changes in the karyotype of 2n = 12 species could produce one or more large chromosomes resulting in a decrease in chromosomes from 6 to 5. Consequently, chromosome lengths in 2n = 10 and derived 2n = 20 species could be increased by addition of repetitive DNA along the length of each chromosome to maintain chromosome field. Chromosomes of 2n = 24 species are more symmetrical and presumably more primitive than the 2n = 20 species. Chiasma frequencies in meiotic cells of all five species are similar. This suggests that the majority of changes DNA content are in repetitive DNA.

Thesis (Ph. D.)--Groningen, 1983. / Description based on print version record. Includes bibliographical references (p. 123-132).

Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Biochemical Sciences Candidate: Bc. Anna Crhová Supervisor: RNDr. Lucie Stuchlíková Raisová, Ph.D. Title of diploma thesis: Biotransformation of monepantel in plants (Campanula rotundifolia, Plantago lanceolata) Anthelmintics are veterinary drugs used to eliminate disease caused by parasitic worms. Monepantel (MOP) is a representative of amino-acetonitrile derivatives. This relatively new group of drugs is effective on helminthic strains, which are resistant to classic therapy (benzimidazoles, makrocyklic lactones, imidazothiazoles). Due to high consuption of these drugs, it is important to find out their fate in the exposed organisms. Anthelmintics are in contact with the environment and they can affect terrestrial and aquatic organisms. Their various forms can be accumulate in plants. These plants can be eaten by the animal, which may lead to development of resistance in helminths. In addition, the physiology of plants and animals may be disrupt and, consequently, biodiversity loss may occur. The aim of this study was to determine the biotransformation processes occurring in ribwort plantain (Plantago lanceolata) and harebell (Campanula rotundifolia) after low concentrations of MOP. Suspensions of both plants cells...

No description available.

Plantago ovata Forssk. (Plantaginaceae) is a winter annual species which, in North America, inhabits desert and Mediterranean habitats of the southwest United States, northwest Mexico and the Channel Islands of California and Mexico. In the eastern hemisphere P. ovata inhabits desert regions ranging from the Canary Islands, across northern Africa to western India. The wide disjunction between P. ovata in the western and eastern hemispheres poses an interesting question as to the origin and biogeography of the species. Previous authors have hypothesized that P. ovata was introduced to North America over the Bering land bridge, from Asia, during the Miocene, or introduced anthropogenically from Europe during the 18th century by Spanish settlers. In this study we examined sequence data from the chloroplast trnL-trnF, trnS-trnG and psbA-trnH regions, the nuclear ribosomal internal transcribed spacer (ITS) and a region 5' of the TCP region of a CYCLOIDEA gene. Using a molecular clock based on an ITS calibration within the Plantago genus, and a clock for plant chloroplast, we date a non-anthropogenic introduction event, from the Old World to North America, approximately 200,000-650,000 years ago. This is consistent with a Pleistocene origin, and does not support a Miocene origin of the disjunction. Based on a morphological survey of 552 specimens, from throughout the world range of P. ovata, we suggest the recognition of four subspecific taxa. Molecular phylogenetic analysis of chloroplast DNA and nuclear ribosomal DNA ITS sequences support this taxonomic treatment. Furthermore, phylogenetic sequences of the CYCLOIDEA gene support the morphological data. Both suggest the origin of North American P. ovata as a result of hybridization between Old World P. ovata varieties. This event provides further evidence that hybridization may serve as a predictor of invasiveness in plants. / Graduation date: 2005

No description available.