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 10 of 10 for “"pteridophytes"”.
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Pteridophytes of the Interior Highlands of North America
Descriptions of the pteridophytes occurring in the Interior Highlands of North America and keys to their identification are presented. All pteridophytes known to occur in the state of Missouri are included. The area under consideration is described, range and habitats within the Interior Highlands …
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The biosystematics of pteridophytes: aspects of morphology and reproductive biology of some epiphytic ferns
<p>Characteristics of fern gametophytes relate to their habitats. Epiphytic habitats are generally covered by bryophyte mats, making a challenging environment for sporophyte production by resident fern gametophytes. Gametophyte morphology and reproductive biology of several epiphytic ferns, …
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Distribution of leaf dissection and sclerophylly along microhabitat gradients in pteridophytes of the Cape peninsula
Plant species with small leaves and sclerophylls have been reported to occur mainly on dry, low-nutrient soils in situations of high insolation. However; a number of physiological functions have been proposed for the two sets of traits. Ferns are well-suited to the study of leaf structure and its …
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Mohria caffrorum (L.) Desv. : a new, unique model organism for the study of desiccation tolerance
… has been little work on desiccation tolerance in pteridophytes Mohria caffrorum (L.) Desv is one such desiccation tolerant pteridophyte This fern has the unique characteristic of having both desiccation tolerant and desiccation sensitive forms, which alternate seasonally, which this study is the …
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Geological Control of Floristic Composition in Amazonian Forests
… specifically evaluated two plant groups, the Pteridophytes (ferns and fern allies) and the Melastomataceae (a family of shrubs and small trees), for use in rapid inventory. Floristic patterns based on inventories from either group were significantly associated with those based on the tree …
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Flora of the Cape Peninsula : endemism, threatened plants and conservation in perspective
… and non-petaloid monocotyledons being important. Pteridophytes in contrast represent 10.9 % of families and only of species. Of the 2285 in the flora 90 are endemics and 141 are threatened. The Bykov's level of endemism at 1 for the Peninsula was high in global terms. Endemic and threatened taxa …
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Structure-function analysis of phototropin receptor kinases
… the unicellular alga Chalmydomonas reinhardtii, pteridophytes and angiosperms. The light sensitivity of phototropins is derived from the action of two highly conserved regions known as LOV domains which subsequently induce activity of an integral serine/threonine kinase domain via movement of a …
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Investigation of phototropin blue light receptor function and signalling in arabidopsis
… Chalmydomonas reinhardtii through bryophytes and pteridophytes up to angiosperms. The model plant Arabidopsis possesses two phototropins (phot1 and phot2) and is the subject of the work presented in this thesis. The general structure of the phototropin protein comprises a photosensory region at …
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Transient heterologous protein expression in green microalgae
… higher order such as angiosperms, bryophytes and pteridophytes, green microalgae are able to shift their metabolism from light-mediated photosynthetic reduction of carbon dioxide to oxidative respiration and reduction of complex carbon (this includes glucose, acetate and glycerol) to fulfil their …
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Effects of nutrient limitation on understory communities in a tropical forest
Ferns are the second most diverse group of vascular plants whose diversity and abundance peak in mid-elevation tropical forests. Soil nutrient limitation is an important factor influencing plant communities and yet little is known about the factors influencing fern floristic composition and …