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Dissertations / Theses on the topic 'Desiccation toleranc'

Author: Grafiati

Published: 1 April 2023

Last updated: 31 July 2025

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1

CRAIGHERO, TERESA. "Biology of the lichen symbiosis." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2932370.

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Lichens may undergo cycles of dehydration-desiccation-rehydration several times a day and this, combined with high light irradiances, can determinate a strong oxidative stress. With the aim of evaluating how lichens with different photobionts and ecology cope with this stress, lobes from Flavoparmelia caperata, Lobaria pulmonaria, Peltigera leucophlebia and Peltigera praetextata were submitted to four combinations of light and drought and their chlorophyll a fluorescence and pigments were analyzed. Light was the environmental factor with the most negative effects in all the four species, more

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2

Potts, Malcolm. "Desiccation tolerance." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/9528/.

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Despite the fundamental significance of desiccation in determining the distributions and activities of living organisms, there is virtually no insight as to the state of the cytoplasm of an air-dried, or even a wet, cell. In bacterial cells that have been subjected to air-drying the evaporation of free cytoplasmic water (Vf) can be instantaneous, and an equilibrium between cell-bound water (VQ and the environmental water (vapor) potential (Ψwv)) may be achieved very rapidly. In the air-dried state some bacteria survive only for seconds, others can tolerate desiccation for thousands, perhaps fo

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3

Chaibenjawong, Plykaeow. "Desiccation Tolerance in Staphylococcus aureus." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522502.

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4

Dace, Halford. "Metabolomics of desiccation tolerance in Xerophyta humilis." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9111.

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Includes bibliographical references<br>Resurrection plants are unique in the ability to survive near complete water loss in vegetative tissues without loss of viability. In order to do so, they employ multifaceted strategies which include structural adaptations, antioxidant and photoprotective mechanisms, and the accumulation of proteins and metabolites that stabilise macromolecules. A full 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

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5

Casteriano, Andrea Veronica. "Physiological mechanisms of desiccation tolerance in Rhizobia." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/10423.

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One of the main factors affecting the survival of rhizobia on seed is desiccation stress. The poor survival of rhizobia affects nodulation, nitrogen fixation and legume yield. A better understanding of desiccation tolerance and how it may be enhanced may contribute to the development of strategies to improve survival of rhizobia on seed. This study aimed to improve the survival of rhizobia by enhancing inherent mechanisms of desiccation tolerance through the manipulation of the growth medium. Accumulation of intracellular trehalose by rhizobia increases in response to osmotic and desiccation s

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6

Fleming, Erich David. "Responses of desiccation-tolerant cyanobacteria to environmental extremes /." view abstract or download file of text, 2006. http://wwwlib.umi.com/cr/uoregon/fullcit?p3211215.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 115-129). Also available for download via the World Wide Web; free to University of Oregon users.

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7

Sheen, Tamsin, and n/a. "Osmotic and desiccation stress-tolerance of Serratia entomophila." University of Otago. Department of Microbiology & Immunology, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081208.114925.

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Serratia entomophila, the causative agent of amber disease, is an endemic bacterium used for the biocontrol of New Zealand grass grub larvae. Although the available biopesticide is effective, its use is limited to areas where sub-surface application is feasible, and is also impacted by soil conditions such as moisture levels and osmolarity. The aim of this study was to elucidate the responses of S. entomophila to osmotic and desiccation stresses in relation to challenges encountered during production, storage and soil application, with the goal of developing a more robust and versatile biocont

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8

Montazeri, Mansoor. "Desiccation tolerance as a factor in mycoherbicides pathogenicity." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289535.

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9

Ratnakumar, Sooraj. "Molecular mechanisms of desiccation tolerance in Saccharomyces cerevisiae." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612298.

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10

Jones, Stephen Keith. "Sitka spruce (Picea sitchensis [Bong.] Carr.) seed germination in relation to seed development, dormancy and storage." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283746.

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11

Lyall, Rafe. "Regulation of desiccation tolerance in Xerophyta seedlings and leaves." Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/22853.

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A small, diverse group of angiosperms 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 transcriptomic and proteomic studies into the mechanisms of plant desiccation tolerance. The aim of this study was to investigate the hypothesis that vegetative desiccation tolerance is derived from the networks that control desiccation tolerance in seeds and germinating

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12

Madden, Christine Frances. "Eragrostis nindensis: unravelling senescence in an African desiccation tolerant grass." Doctoral thesis, Faculty of Science, 2019. https://hdl.handle.net/11427/31652.

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Food security is one of the most important global challenges facing the world today, especially in the context of climate change. Research has been conducted into a unique group of plants, called “resurrection plants”, that can withstand up to 95% tissue water-loss without compromising viability by, inter alia, undergoing extensive metabolic reprogramming and suppressing 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

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13

Wright, Deborah J. "Molecular Biology of Desiccation Tolerance in the Cyanobacterium Nostoc commune." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9714.

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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. Phylogenetic analysis of the entire data set made it possible to define the form species Nostoc commune. The synthase (spsA) and phosphatase (sppA) genes required for the synthesis of sucrose were isolated from cyanobacterium Synechocystis sp. strain PCC 6803 and overexpressed in E. coli in two differen

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14

Mulat, Teshome G. "Chemical desiccation tolerance and nonstructural carbohydrate dynamics in winter wheat." Access citation, abstract and download form; downloadable file 3.70 Mb, 2004. http://wwwlib.umi.com/dissertations/fullcit/3131690.

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15

Dzobo, Kevin. "Characterization of polyphenols in leaves of four desiccation tolerant plant families." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4256.

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Includes bibliographical references.<br>Polyphenols in plants are known to act as antioxidants, antimicrobials, antifungal, photoreceptors, visual attractors and as light screens. In this study polyphenols in angiosperms found in southern Africa and called resurrection (desiccation tolerant) plants were studied. These plants are Myrothamnus flabellifolius, Xerophyta viscosa, Xerophyta humilis, Xerophyta schlecterii, Xerophyta villosa. Craterostigma wilmsii, Craterostigma plantagineum, Craterostigma pumilum and Eragrostis nindensis. These plants are able to tolerate water stress without undergo

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16

López, Martínez Gema Isabel. "Functional characterization in vivo of essential Saccharomyces cerevisiae's hydrophilin for desiccation tolerance." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/311618.

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La sobre expressió de les hidrofilines STF2 i SIP18 en soques de laboratori, tenen un efecte positiu en la tolerància a la deshidratació i rehidratació. A més, la sobre expressió de SIP18 en quatre soques comercials de llevat industrial mostra el mateix fenotip que les soques de laboratori sense alterar els paràmetres de la fermentació. Aquests resultats ens permeten proposar la sobre expressió de SIP18 com una possible forma de millorar la viabilitat en el llevat sec actiu (LSA) i obtenir així un inòcul d'alta qualitat per les empreses alimentàries. A més es disminuirien els costos d'emmagatz

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17

Jamell, Sanna. "Differences in desiccation and freezing tolerance in limnic and limno-terrestrial tardigrades." Thesis, Högskolan Kristianstad, Sektionen för lärande och miljö, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-15027.

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Tardigrades are microscopic aquatic invertebrates that are known for their ability to survive extreme conditions. Different species of tardigrades tolerate extreme conditions to a varying degree. It has been suggested that limnic tardigrades would have a lower tolerance to desiccation compared to limno-terrestrial tardigrades. In this study limno-terrestrial species Ramazzottius oberhaeuseri and the limnic species Hypsibius dujardini is compared in regard to their tolerance to desiccation and freezing. The results show that there indeed is a difference in the tolerance and that Ramazzottius ob

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18

Vicre, Maїté. "Cell wall involvement in desiccation tolerance in the resurrection plant Craterostigma wilmsii." Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/8774.

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Bibliography: leaves 92-129.<br>Resurrection plants have the unique capacity to revive 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 extensive shrinkage occurs during drying as well as a considerable wall folding. It is thought that this folding is a well controlled process rather than a simple collapse and that the ability of the wall to fold is imp

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19

Williams, Jason. "Links Between Desiccation Resistance and Cold-Tolerance in an Overwintering Insect: Seasonal and Geographic Trends." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1124223034.

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20

Layfield, Johnathon Blake. "Characterization of Hybrid Strains of Saccharomyces pastorianus for Desiccation Tolerance and Fermentation Performance." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-08182009-130032/.

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Dry yeast can be utilized in both ale and lager beer production to provide an inexpensive source of large amounts of viable cells for fermentation. This study examines the desiccation tolerance of different strains of S. pastorianus and the subsequent fermentation performance in comparison to S. cerevisiae. The use of active dry brewerâs yeast (ADY), Saccharomyces cerevisiae, as a starter for the production of ales has been gaining popularity within the brewing industry, spurring manufactures to also produce active dry lager yeast (ADLY), S. pastorianus. The drying process is known to have a g

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21

Lima, Manuel de Jesus Vieira. "Desiccation tolerance, development, maturation and storage of seeds of several tropical tree species." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297637.

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22

Koonjul, Priyum K. "Investigating the mechanisms of desiccation tolerance in the resurrection plant, myrothamnus flabellifolius (WELW)." Doctoral thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/9940.

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Biliography : leaves 162-184.<br>Resurrection plants, including Myrothamnus flabellifolius, grow in shallow soil upon rocky outcrops where they experience regular periods of water stress. Associated with this is light stress. The presence of light under water limiting conditions can result in photo-oxidation which causes damage to plant tissues. M flabellifolius is a homoichlorophyllous 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 chloro

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23

Kruger, Lynette Anne. "Towards an understanding of the mechanisms of desiccation tolerance in Myrothamnus flabellifolius (WELW.)." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/17369.

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Bibliography: pages 110-123.<br>To date, 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 dried off the plant, and also with twigs excised after having dried on the plant. Study of the leaf response during drying and recovery in the presence and/or absence of roots, and following prolonged desiccation, can contribute towards understanding the mechanis

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24

Koshawatana, Chutima. "Physiological, biochemical and chemical studies on desiccation tolerance primarily in developing wheat seeds." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phk859.pdf.

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Bibliography: leaves 155-182. Most agricultural crop seeds are 'orthodox' ie. desiccation is a necessary feature of their complete life cycle. Low moisture content lengthens the storage life of orthodox seeds. Recalcitrant seeds, which do not tolerate low moisture content, lose viability in dry storage. The thesis studies the role of sugars in desiccation tolerance in developing seeds and investigates other mechanisms which might be involved in desiccation tolerance and desiccation sensitivity.

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Silva, João Paulo Naldi [UNESP]. "Mecanismos de controle de tolerância à dissecação em sementes de Caesalpinia echinata LAM. (Pau-Brasil) e Caesalpinia peltophoroides BENTH. (Sibipiruna)." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/92096.

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Made available in DSpace on 2014-06-11T19:25:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-02-22Bitstream added on 2014-06-13T19:32:54Z : No. of bitstreams: 1 silva_jpn_me_botib.pdf: 1461698 bytes, checksum: f3d2da00e4477125c12042e4a44960b3 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A aquisição da tolerância à dessecação ocorre durante a maturação da semente, após acúmulo de reservas e antes do início do processo natural de secagem, porém, com o avanço da germinação a sensibilidade a dessecação aumenta. Estresses hídricos podem induzir ou restabelec

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Otieno, Mary Atieno. "Proteomic Changes in Rhizobia after Growth in Peat Extract and Their Potential Role in Desiccation Tolerance." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17791.

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Survival of rhizobia on seed is mainly affected by desiccation. Inherent differences in survival exist between rhizobia strains as well as with growth conditions, with a general improvement in survival seen in cells grown in peat over cells grown on growth media. Improving survival of rhizobia under desiccation stress may enhance nitrogen fixation and crop yields. This study aimed to relate desiccation tolerance of rhizobia to physiological changes in cells grown in peat extract. Survival of four rhizobia strains (Rhizobium leguminosarum bv. viciae, 3841, Rhizobium leguminosarum bv. trifolli T

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Ferebee, James Harrison IV. "New Herbicide Strategies for Weed Management in Pumpkin and Soybean and Potato Vine Desiccation." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/86611.

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Weed control and desiccation are routinely executed with herbicides. Potato vine desiccation facilitates harvest, improves skin set, and regulates tuber size. Saflufenacil, glufosinate, saflufenacil plus glufosinate, and carfentrazone plus glufosinate were compared to diquat applied at 43, 31, and 17% B potatoes; similar vine desiccation (14 days after treatment), skin set, and yield were noted amongst treatments. Residual herbicides are routinely used for weed control in pumpkin. Fluridone and acetochlor formulations applied preemergence were evaluated in direct-seeded pumpkin compared to oth

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Hill, Donna René. "Morphological, biochemical and molecular characterization of desiccation-tolerance in cyanobacterium Nostoc commune var. Vauch." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/40154.

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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 dyes, revealed changes in the pattern of differentiation in glycan micro-structure, as well as localized shifts in pH, upon rehydration of desiccated field material. A Ca/Si rich external (pellicular) layer of the glycan acts as a physical barrier on the surface of N. commune colonies. A purified fr

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Philip, Benjamin N. "Characterization and physiological role of aquaporins during desiccation and freezing in Eurosta solidaginis." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1280843234.

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Wiswedel, Stefan. "Mohria caffrorum (L.) Desv. : a new, unique model organism for the study of desiccation tolerance." Bachelor's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/23926.

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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 and partially understood in the less complex clades including the algae, bryophytes and lichens but is uncommon in the vascular land plants. Vegetative desiccation tolerance is partially understood in the angiosperms but there has been little work on desiccation tolerance in pteridophytes Mohria caf

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Milborrow, Evan. "Non-coding RNA networks regulating leaf vegetative desiccation tolerance in the resurrection plant Xerophyta humilis." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29437.

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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 programmes, have been identified, very little is known with regards to the role of regulatory noncoding RNAs (ncRNAs). To investigate the presence and roles of possible ncRNA players, RNA-Seq was performed on desiccating Xerophyta humilis leaves and a bioinformatic pipeline assembled to identify the potent

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Peng, Congyue. "Characterization of a membrane protein encoding cDNA (TrDr3) from the desiccation-tolerant moss Tortula ruralis /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1597629781&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Silva, Joao Paulo Naldi. "Mecanismos de controle de tolerância à dissecação em sementes de Caesalpinia echinata LAM. (Pau-Brasil) e Caesalpinia peltophoroides BENTH. (Sibipiruna) /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/92096.

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Orientador: Claudio José Barbedo<br>Banca: Jose Maria Rocha Faria<br>Banca: João Rodrigues Domingos<br>Resumo: A aquisição da tolerância à dessecação ocorre durante a maturação da semente, após acúmulo de reservas e antes do início do processo natural de secagem, porém, com o avanço da germinação a sensibilidade a dessecação aumenta. Estresses hídricos podem induzir ou restabelecer a tolerância à dessecação em sementes, porém, não se sabe em quais processos ele atua, como na ativação de genes. O objetivo deste trabalho foi avaliar a aquisição e perda de tolerância à dessecação em sementes de C

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Shoko, Ryman. "A proteomic investigation of the rhizomes of the resurrection fern Mohria caffrorum L. (Desv.) in response to desiccation." Doctoral thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/16779.

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Includes bibliographical references<br>As there is limited 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 summer and desiccation-sensitive in winter. Since fern rhizomes are perennial organs, it was of interest to establish whether these organs are also perennially desiccation-tolerant and, whether or not the rhizomes regulate desiccation-tolerance in th

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Sines, Brian James. "Isolation and partial characterization of a water stress protein of the desiccation-tolerant cyanobacterium Nostoc commune UTEX 584 expressed in Escherichia coli." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/46434.

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A desiccation-tolerant cyanobacterium <i>Nostoc commune</i> accumulates a novel group of water stress proteins (Wsp) in response to cycles of repeated drying and rehydration. Antibodies, specific for Wsp, were used to screen a lambdafix II library of <i>N. commune</i> UTEX 584 Bam H1 DNA fragments and an 8.5-kb fragment, containing a gene cluster that synthesized a 59-kDa cross-reactive protein. The cloned fragment comprised five ORF’s. The ORF’s 59, 24, 22, 36, and 70, each potentially encode products of molecular weights of 59, 24, 22, 36, and 70-kDa, respectively. The 59 and 24 ORF products

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Svensson, Jan. "Functional studies of the role of plant dehydrins in tolerance to salinity, desiccation and low temperature /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5779-3.pdf.

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Walford, Sally-Ann. "Activation of seed-specific genes in leaves and roots of the desiccation tolerant plant, Xerophyta humilis." Doctoral thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/4349.

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Includes abstract.<br>Includes bibliographical references (leaves 131-169).<br>The ability of tissues to survive almost complete loss of cellular water is a trait 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 desiccation of greater than 90% in both its seeds and vegetative tissues and return to active metabolism upon rehydration. We have tested the hyp

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Ludanyi, Monika. "Extreme radiation tolerance of Deinococcus deserti : Characterization of the central regulator IrrE." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4066.

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Les bactéries du genre Deinococcus sont extrêmement tolérantes à de fortes doses de radiations. Des études antérieures ont montré que IrrE est nécessaire à la radiotolérance et à l'induction des gènes de réparation de l'ADN après exposition des cellules à l'irradiation. Pendant des années il est resté inconnu comment IrrE active l'expression de ces gènes. L'objectif de ma thèse était la caractérisation de la voie de signalisation dépendent de IrrE chez Deinococcus deserti. Pour cela, des approches biochimiques et génétiques ont été utilisées. Les premiers résultats ont fortement suggéré que Ir

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Smith-Espinoza, Claudia J. "Analysis of ABA and drought stress mediated gene expression in the desiccation tolerant resurrection plant Craterostigma plantagineum." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963130862.

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Smith, Michaela Madeleine 1972. "Maintenance of ultrastructural integrity during dehydration in a desiccation tolerant angiosperm as revealed by improved preservation techniques." Monash University, Dept. of Biological Sciences, 2002. http://arrow.monash.edu.au/hdl/1959.1/8323.

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Dimson, Emily V. "Development and desiccation tolerance of the seeds of Acer rubrum L., Acer saccharinum L. and their hybrid." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ40408.pdf.

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Gasulla, Vidal Francisco. "Insights on desiccation tolerance of the lichen photobiont trebouxia sp. pl. in both thalline and isolated ones." Doctoral thesis, Universitat de València, 2009. http://hdl.handle.net/10803/39081.

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The study of desiccation tolerance of lichens, and of their phycobionts in particular, has been mainly focused on the antioxidant system that protects the cell against photo-oxidative stress produced during dehydration and rehydration. However, desiccation tolerance cannot be achieved in lichen phycobionts with antioxidant activity alone. The main objective of the thesis was to expand the knowledge of the poorly understood desiccation tolerant mechanisms. The first chapter presents an introduction to the subject of the thesis, based on the available background information, and explains the r

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Joardar, Vinita. "Molecular analysis of genes involved in carbohydrate metabolism in the desiccation-tolerant cyanobacterium Nostoc commune UTEX 584." Diss., Virginia Tech, 1995. http://hdl.handle.net/10919/40311.

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Synthesis of water stress proteins (Wsp) is induced upon repeated desiccation and rehydration of immobilized cells of the desiccation-tolerant cyanobacterium <i>Nostoc commune</i> UTEX 584 (<i>Nostoc</i> 584). The Wsp polypeptides synthesized and secreted by field material of N. <i>commune</i> have been extensively characterized and shown to exist as three isoforms with molecular masses of 33, 37 and 39 kDa. In order to understand the role of Wsp in the mechanism of tolerance to water stress an attempt was made to isolate the gene(s) that encodes Wsp in <i>Nostoc</i> 584. A polyclonal antibody

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Brown, Carly. "A comparison of some potential indicators of desiccation-tolerance in 2 Poikilochlorophyllous Xerophyta species and Homiochlorophyllous Craterostigma wilmsii." Bachelor's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/24762.

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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 angiosperm species; Xerophyta schlecterii and Xerophyta humilis, and a dicotyledonous homiochlorophyllous resurrection species, Craterostigma wilmsii. Comparisons were also made with Xerophyta viscosa, using data from Whittaker et al, (2001). Soluble sugar concentrations and hexokinase activities wer

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Bergh, Nicola G. "Aspects of the prevention of light damage during drying and rehydration of the desiccation-tolerant grass Eragrostis nindensis." Bachelor's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/25780.

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There are two main mechanisms of desiccation-tolerance in angiosperms. Both of these (poikilochlorophylly and homoiochlorophylly) involve adaptations to prevent light-induced damage as the plants dry and rehydrate. The poikiolchlorophyllous grass E. nindensis was investigated to determine physiological responses to light during drying, and mechanisms of tolerance of dehydration. The desiccation-sensitive E. curvula was investigated simultaneously as a control in order to compare responses of tolerant and sensitive relatives. Quantum efficiency of photosystem II was determined using chlorophyll

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Pereira, Luciano 1981. "Resistência à seca em plântulas de espécies arbóreas da floresta estacional semidecídua." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314924.

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Orientadores: Claudia Regina Baptista Haddad, Fernando Roberto Martins<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-18T12:00:54Z (GMT). No. of bitstreams: 1 Pereira_Luciano_M.pdf: 1574760 bytes, checksum: 86654daaeda73234eef3076e41dd937f (MD5) Previous issue date: 2011<br>Resumo: Apesar da alta pluviosidade nas florestas tropicais, há grande variação na disponibilidade hídrica para as plantas. Em escala local, essa disponibilidade pode variar dependendo da localização dos indivíduos em clareiras, sua posição no re

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Gardner, Michael Jack. "Resources for the investigation of the desiccation tolerance mechanisms of the roots of Xerophyta humilis (Bak) Dur and Schinz." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/4263.

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Bibliography: leaves 119-150.<br>Although roots play an integral role in the sensing and amelioration of environmenatl stresses, there are no reports that 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 survive desiccation. This report details foundational studies of the functional anatomy and large-scale molecular responses of the roots during dehydrtion an

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Peng, Xiaobing Carleton University Dissertation Biology. "The role of abscisic acid and abscisic acid-analogs in inducing desiccation tolerance in microspore-derived embryos of Brassica Napus." Ottawa, 1994.

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Burdine, Justin D. "Factors influencing bee communities and pollination services across an urban environment." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1554460864439054.

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Moore, John Paul. "The role of polyphenols and the cell wall in relation to the desiccation tolerance of the resurrection plant, Myrothamnus flabellifolia (Welw.)." Doctoral thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/4299.

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Includes bibliographical references (p. 160-191).<br>Resurrection plants are unique in that their vegetative tissue has the ability of survive reversible dehydration to an air-dry state. The widespread African resurrection plant Myrothamnus flabellifolia (Welw), woody shrub, is one of the largest of these plants. In addition to its resurrection ability it is also an important medicinal plant and is used by local tribes in the various regions where it grows to treat a wide variety of ailments. This thesis has investigated a number of morphological, ultrastructural and biochemical adaptations o

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