Global ETD Search

1	Ekologické determinanty klonálního růstu rostlin / Ecological determinants of plant clonal growth Martincová, Nina January 2016 (has links) The aim of this study is to provide a further insight into influence of environment on clonal plants. The study focuses particularly on effects of fertilization level and light availability on production and growth of clonal organs. Three experiments were carried out within the study, targeted to elicit influence of these environmental conditions or clonal interactions on six species of clonal plants. Interspecies dependencies on these conditions was compared, regarding habitat occurrence of these species. A comparison was made also between species producing rhizomes and stolons. The experiments revealed that five of six studied species show significant relationship among at least one environmental condition and parameters of clonal reproduction. Most of the species showed higher elongation and production of clonal organs in relation to fertilization level. On the contrary, only three species reacted significantly to the light availability level by alternation of at least one parameter of clonal reproduction and the light availability level affected each species differently. A strong influence on production and elongation of clonal organs had also a size of a plant. There was not found significant difference in influence of environmental conditions on clonal reproduction among plant families. It...
2	Phylogenetic Analysis of Subtribe Alopecurinae (Poaceae) Boudko, Ekaterina 12 March 2014 (has links) Subtribe Alopecurinae (Poeae, Poaceae) sensu lato‘s seven genera share interesting morphological similarities (dense spicate panicles and one-flowered spikelets) that were widely thought to have a common origin. However, recent molecular evidence for three of the genera has suggested that the subtribe may be polyphyletic. To test this, five DNA regions were sequenced and analyzed using phylogenetic methods. Results confirm that Alopecurinae s.l. as presently treated is polyphyletic and should be dissolved. Additionally, the genus Cornucopiae may be just another Alopecurus. Limnas and Pseudophleum are not closely allied to Alopecurus or each other, and are even further from Phleum. Phleum is a distinct lineage that is not closely allied to any other included Alopecurinae genus. Evidence for revising infrageneric classifications of Alopecurus and Phleum is presented, as is evidence for separating A. magellanicus into two or more subspecies. Poaceae Alopecurinae Poinae Poeae Phleinae Pooideae Phylogenetics Phylogeny Polyphyly Molecular Botany Taxonomy Systematics Alopecurus Phleum Beckmannia Limnas Cornucopiae Rhizocephalus Pseudophleum Plant Grass DNA sequencing trnT-trnL-trnF rpoB-trnC matK ITS ETS Convergent Evolution Hybridization Morphology Evolution Genetics Flora Subtribe
3	Phylogenetic Analysis of Subtribe Alopecurinae (Poaceae) Boudko, Ekaterina January 2014 (has links) Subtribe Alopecurinae (Poeae, Poaceae) sensu lato‘s seven genera share interesting morphological similarities (dense spicate panicles and one-flowered spikelets) that were widely thought to have a common origin. However, recent molecular evidence for three of the genera has suggested that the subtribe may be polyphyletic. To test this, five DNA regions were sequenced and analyzed using phylogenetic methods. Results confirm that Alopecurinae s.l. as presently treated is polyphyletic and should be dissolved. Additionally, the genus Cornucopiae may be just another Alopecurus. Limnas and Pseudophleum are not closely allied to Alopecurus or each other, and are even further from Phleum. Phleum is a distinct lineage that is not closely allied to any other included Alopecurinae genus. Evidence for revising infrageneric classifications of Alopecurus and Phleum is presented, as is evidence for separating A. magellanicus into two or more subspecies. Poaceae Alopecurinae Poinae Poeae Phleinae Pooideae Phylogenetics Phylogeny Polyphyly Molecular Botany Taxonomy Systematics Alopecurus Phleum Beckmannia Limnas Cornucopiae Rhizocephalus Pseudophleum Plant Grass DNA sequencing trnT-trnL-trnF rpoB-trnC matK ITS ETS Convergent Evolution Hybridization Morphology Evolution Genetics Flora Subtribe

1

Page generated in 0.0387 seconds