Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Vegetative propagation"”.
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Cultivation of Palmaria palmata: spore release, vegetative propagation and decontamination techniques.
… methods of growing P. palmata from spores and vegetatively for the development of a commercial crop. Initially, methods of spore release were trialled and spore survival was observed. Epiphytic growth was observed on spores for which a number of chemical treatments were then investigated. …
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Seed and vegetative propagation methods for the rare Florida native species Chionanthus pygmaeus (pygmy fringetree)
… fringetree and its potential for commercial propagation for use in managed landscapes is contingent on a better understanding of its complex seed dormancy and enhancement of its propagation. I conducted two experiments to assess sexual and asexual propagation methods for pygmy fringetree. The …
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The genetic determinants of vigour control and precocity by pear (Pyrus communis L.) rootstocks
… candidate genes in both genera. The ease of vegetative propagation, a crucial trait for rootstock breeding, was assessed in rooting experiments and small effect QTLs were identified. These results will help to understand the genetic control of vegetative propagation in pear, and may assist in …
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PRODUCTION OF VIRUS-FREE ORCHIDS VIA TISSUE CULTURE TECHNIQUES
Due to constant handling and vegetative propagation, most commercially cultivated orchid hybrids are systemically infected with cymbidium mosaic virus (CyMV) and/or odontoglossum ringspot virus (ORSV). Two tissue culture techniques were employed in this project to eliminate the viral pathogens from …
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The Distribution of Genetic Variation Among Relictual Populations of Missouri Tallgrass Prairie Plants
… in the prairie ecosystem predominantly via vegetative propagation, Ruellia humilis, which has a mixed mating system, and Liatris pycnostachya, which is an obligate outcrosser. The Fst estimates were 0.0318 for S. scoparius (two polymorphic loci), 0.0385 for R. humilis (six polymorphic loci), …
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Development, selection and characterization of summer patch (Magnaporthe poae Landschoot and Jackson) resistant somaclones of Kentucky bluegrass (Poa pratensis L.) genotypes
… was expressed through several cycles of vegetative propagation. There was no relationship between resistance to summer patch and that of powdery mildew.
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Adoption Potential of two Agroforestry Technologies: Improved Fallows and Domestication of Indigenous Fruit Trees in the Humid Forest and Savannah Zones of Cameroon
… showed technical and financial feasibility of vegetative propagation of a number of indigenous fruit trees in farmer nurseries. However, wide-scale adoption of vegetative propagation is likely to be constrained by the cost of nursery infrastructure and materials. Measures to enhance adoption …
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The potential of Grateloupia filicina (Lamouroux) J. Agardh. for mariculture: culture experiments and observations on shore phenology
… technique for mariculturing this species. Since vegetative propagation from thallus fragments has not been successful, the present study was initiated to determine suitable conditions for spore liberation and growth of G. filicina from spores. It was also attempted to propagate G. filicina …
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Characterization of the Role of miR156-SPL12 Regulatory Module in Root Architecture and Stress Response in Medicago sativa (alfalfa)
… fixation, and root regenerative capacity during vegetative propagation. In alfalfa, transcripts of 11 SPLs, including SPL12, are targeted by miR156. Our understanding of the functions of SPLs and their mode of action in alfalfa’s nodulation and nitrogen fixation is still elusive, and thus this …
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The birds, the bees and Erica: vulnerability of plant-pollinator communities in fragmented fynbos landscapes
… strategies (e.g. autonomous self-pollination, vegetative growth, and generalised pollination systems) could reduce dependence on specific pollinators and increase the chances of a species being able to persist through a period of low-pollinator abundance. The prevalence of autogamy and …
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Harakeke (Phormium tenax) ecology and historical management by Maori: The changing landscape in New Zealand
… techniques included seed germination as well as vegetative propagation. Early records of harakeke pests were not found. Records of harakeke irrigation and the use of fire indicate that Maori created suitable conditions for new cultivations or pii harakeke, which may also have prevented insect …
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Regeneration potential of selected medicinal plants used to treat human and livestock diseases in Limpopo Province of South Africa
Many high valued tree species of medicinal significance in the Limpopo Province, South Africa exhibit seed dormancy, and also contain aromatic oils which inhibit rooting of their stem cuttings. These plant species are under pressure due to human over-exploitation. The main objective of this study …
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Tropical bracken, a powerful invader of pastures in South Ecuador: Species composition, ecology, control measures, and pasture restoration
… for the tropical fern in comparison to vegetative propagation by rhizome fragmentation. Four weeks after burning the natural rain forest, vigorously sprouting bracken sporophytes were observed. These developed from gametophytes, which germinated from the wind dispersed spores. Fast …
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Conservation Strategies of the Red Listed Brackenridgea zanguebarica Oliv. in Vhembe District Municipality, Limpopo Province, South Africa
… constituents from the different plant parts, the propagation methods of the species, and the factors delaying the germination of its seeds. In this study, an assessment of the current population threats was important as a first step in conservation; this would update the status of the species in …
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Understanding angiosperm genome interactions and evolution: insights from sacred lotus (Nelumbo nucifera) and the carrot family (Apiaceae)
… its nucleus may be the result of its history of vegetative propagation, low nucleotide substitution rate, and lack of several paleo-duplications. Unlike N. nucifera, and the majority of other angiosperms, the plastomes of several members of the apioid superclade within the carrot family (Apiaceae …
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Diversity and Evolution of Short Interspersed Nuclear Elements (SINEs) in Angiosperm and Gymnosperm Species and their Application as molecular Markers for Genotyping
… camellia (C. japonica) trees indicating their vegetative propagation from the same ancestor specimen, which was probably the first living camellia on European ground introduced to England within the 18th century. Historical sources locate the native origin of this ancestral camellia specimen …