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.
Results
Showing 1 to 20 of 59 for “"desiccation-tolerance"”.
-
Metabolomics of desiccation tolerance in Xerophyta humilis
… understanding of the phenomenon of vegetative desiccation tolerance will require a systems view of these adaptations at the levels of the genome, the control of gene expression, and the control of metabolic pathways. This dissertation reports a high-throughput metabolomic analysis of the …
-
Regulation of desiccation tolerance in Xerophyta seedlings and leaves
… known as resurrection plants display vegetative desiccation tolerance and can survive loss of up to 95% of cellular water, a feat only seen in the seeds and pollen of other angiosperms. Xerophyta humilis is a resurrection plant native to Southern Africa that has been the target of previous …
-
Molecular Biology of Desiccation Tolerance in the Cyanobacterium Nostoc commune
The molecular biology of desiccation tolerance was investigated in the cyanobacteria with emphasis on Nostoc commune. Analysis of DNA from 41 samples of desiccated Nostoc spp. of varied age and global distribution led to the amplification of 43 independent tRNALEU(UAA) group 1 intron sequences. …
-
Cell wall involvement in desiccation tolerance in the resurrection plant Craterostigma wilmsii
… from an air-dried state. In order to cope with desiccation, resurrection plants have to overcome a number of stresses, mechanical stress being one. This occurs when the cytoplasm shrinks creating tension between the plasma membrane and the cell wall. In leaves of the Craterostigma species, an …
-
Investigating the mechanisms of desiccation tolerance in the resurrection plant, myrothamnus flabellifolius (WELW)
… plant and thus retains chlorophyll during desiccation. The mechanisms whereby this plant prevents photo-oxidation damage are not known and thus one of the objectives of this study was to characterise the chloroplasts and the changes they undergo during dehydration. It was shown that …
-
Towards an understanding of the mechanisms of desiccation tolerance in Myrothamnus flabellifolius (WELW.)
… most of the studies on the homoiochlorophyllous desiccation-tolerant (HDT) plant Myrothamnus flabellifolius have been conducted on excised twigs or leaves. In this study drying (including prolonged exposure to the dry state), and recovery of whole plants was compared with that of detached twigs …
-
Morphological, biochemical and molecular characterization of desiccation-tolerance in cyanobacterium Nostoc commune var. Vauch
Filaments of the desiccation-tolerant cyanobacterium Nostoc commune are embedded within, and distributed throughout, a dense glycan sheath. Analysis of the glycan of field materials and of pure cultures of N. commune DRH1 through light and electron microscopy, immunogold-labelling and staining with …
-
Mohria caffrorum (L.) Desv. : a new, unique model organism for the study of desiccation tolerance
Vegetative desiccation tolerance is the ability of a plant to dry to equilibrium with its surrounding atmosphere and remain in this dry state for prolonged periods of time. Upon rehydration, these plants are able to regain full physiological functionality. Vegetative desiccation tolerance is common …
-
Non-coding RNA networks regulating leaf vegetative desiccation tolerance in the resurrection plant Xerophyta humilis.
Common to orthodox seeds, desiccation tolerance (DT) is exceedingly rare in the vegetative tissues of modern angiosperms, being limited to a small number of "resurrection plants". While the molecular mechanisms of DT, as well as the transcription factors regulating the seed and vegetative DT …
-
Transcriptional regulation of seasonal desiccation tolerance in the fronds and rhizome of the fern Anemia caffrorum
… causes more intense and extended droughts. Desiccation tolerant plants are capable of surviving long periods of severe water loss (> 95% of cellular water) and are therefore prominent models for the production of climate smart crops. The fern Anemia caffrorum is a particularly interesting …
-
A comparison of some potential indicators of desiccation-tolerance in 2 Poikilochlorophyllous Xerophyta species and Homiochlorophyllous Craterostigma wilmsii
Three possible indicators of desiccation-tolerance in ang10sperms: sucrose accumulation and hexose sugar flux, an increase in hexokinase activity, and accumulation of LEA-like proteins, were investigated and compared during dehydration between two moncotyledonous poikilochlorophyllous resurrection …
-
Resources for the investigation of the desiccation tolerance mechanisms of the roots of Xerophyta humilis (Bak) Dur and Schinz
… specifically detail their involvement in the desiccation tolerance mechanisms of resurrection plants. Very lttle is known about even the genral anatomy and physiology of the roots of plants such as X. humilis, and almost nothing about the molecular responses that confer their ability to …
-
The role of polyphenols and the cell wall in relation to the desiccation tolerance of the resurrection plant, Myrothamnus flabellifolia (Welw.)
… cell wall of M. flabellifolia in relation to its desiccation tolerance.
-
A proteomic investigation of the rhizomes of the resurrection fern Mohria caffrorum L. (Desv.) in response to desiccation
… information on the mechanisms of vegetative desiccation-tolerance in resurrection plant rhizomes, this work was undertaken to study the mechanisms of desiccation-tolerance in Mohria caffrorum rhizomes. Fronds of this plant have been previously characterized as being desiccation-tolerant in …
-
Activation of seed-specific genes in leaves and roots of the desiccation tolerant plant, Xerophyta humilis
… found throughout the plant kingdom. While this desiccation tolerance is common in seeds of most angiosperms it is rare in their vegetative tissues. Xerophyta humilis (Bak.) Dur and Schintz belongs to a small group of resurrection angiosperms and it possesses the ability to withstand extreme …
-
Eragrostis nindensis: unravelling senescence in an African desiccation tolerant grass
… senescence. In this thesis the African desiccation tolerant grass Eragrostis nindensis (Fical & Hiern) was used as a model plant to identify which biological processes are unique to senescence and critical for desiccation tolerance. When desiccated, the older leaves of E. nindensis …
-
The role of a Polyphenol from Myrothamnus flabellifolius in the protection of membranes during desiccation-using liposomes as a model membrane system
… less than 2% water content, a property known as desiccation tolerance. Recently a polyphenol extracted from the leaves of a common African resurrection tree Myrothamnus flabellifolius Welw. has been isolated and characterised as 3,4,5-tri-O-galloylquinic acid. This study has investigated the role …
-
Characterization of two, desiccation linked, Group 1 LEA proteins from the resurrection plant Xerophyta humilis
… Abundant (LEA) proteins associated with desiccation tolerance. However, the precise role of these proteins has not been described. This study was undertaken to investigate expression, structure and function of XhLEA1-4S1 and XhLEA1-1S2, Group 1 LEA proteins from Xerophyta humilis, in …
-
The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation
In angiosperms, desiccation tolerance, a genetic trait that enables tissues to survive loss of more than 95% of cellular water is widely observed in the seeds, but is only found in the vegetative tissues of a small group of species known as the resurrection plants. Xerophyta humilis is a small …
-
Analysis of the nuclear proteome of the resurrection plant Xerophyta viscosa (Baker) and its response to dehydration stress
… can survive extremes of dehydration (desiccation), down to 5% relative water content (RWC) and resumes full physiological activity within 80 h of rehydration. A thorough understanding of this phenomenon may provide further insight into possible mechanisms for improving drought …
Page 1 of 3