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Life history strategies of three species of Cystophora (Phaeophyta, Fucales) from a shallow subtidal community in South Australia / by Sarah L. Hotchkiss.Hotchkiss, Sarah L. (Sarah Lynn) January 1999 (has links)
Bibliography: p. 125-138. / 149 p. : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / A number of life history traits were quantified for three species of Cystophora. The composition and dynamics of the community were monitored and related to temporal changes in the patterns of growth and reproduction of each species, and also to patterns of recruitment and early community development. / Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2000
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Life history strategies of three species of Cystophora (Phaeophyta, Fucales) from a shallow subtidal community in South Australia /Hotchkiss, Sarah L. January 1999 (has links) (PDF)
Thesis (Ph.D.) -- University of Adelaide, Dept. of Environmental Biology, 2000. / Bibliography: p. 125-138.
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Life history strategies of three species of Cystophora (Phaeophyta, Fucales) from a shallow subtidal community in South AustraliaHotchkiss, Sarah L. (Sarah Lynn) January 1999 (has links) (PDF)
Bibliography: p. 125-138. A number of life history traits were quantified for three species of Cystophora. The composition and dynamics of the community were monitored and related to temporal changes in the patterns of growth and reproduction of each species, and also to patterns of recruitment and early community development.
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Factors influencing recruitment of the Dictyotalean brown alga Zonaria farlowii and other sessile marine organisms at Santa Catalina Island, CaliforniaAnderson, Sean Sumner. January 2003 (has links)
Thesis (Ph. D.)--University of California, Los Angeles, 2003. / Vita. Includes bibliographical references.
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Analytical studies on the carbohydrates of the PhaeophyceaeRoss, Alan G. January 1949 (has links)
No description available.
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Molecular and cell biology of novel brown algal pathosystemsMurúa, Pedro January 2018 (has links)
Algae are increasingly being used in human affairs. Alongside with higher volumes, threats for seaweed natural reservoirs and seaweed farming are starting to appear. Epidemics seems a key complication, similar to agriculture and animal aquaculture. However, phycopathologies are much more under documented, and future diseases are currently difficult to foresee. Thus, efforts should be stressed on biodiversity of algal pathogens and algal defense strategies against diseases. This thesis is divided in two parts: the first section comprises Chapters Two and Three, which describe novel algal pathosystems from cell biology and molecular phylogeny perspectives. Chapter Two characterizes the obligate parasite Maullinia braseltonii sp. nov., a phytomyxid infecting Durvillaea (bull kelp) in the Southern hemisphere. Chapter Three reports new records, cell plasticity and epidemiology of the endophyte Laminariocolax aecidioides infecting Lessonia berteroana (huiro negro) in northern Chile. The two hosts aforementioned have commercial importance, and remarkable roles in coastal ecology in temperate marine habitats in the Southern hemisphere. Chapters Four, Five and Six correspond to a second section and describe cellular processes in novel brown algal pathosystems, related with infection and immunity responses. In Chapter Four, using the Macrocystis/Anisolpidium as a model, microscopy evidence indicate that autophagy is a key cellular process used either to help starving pathogen syncytia to survive (controlled) or to kill themselves (abortive), probably induced by the host. Likewise, host autophagy was also widely observed and may be involved in the neutralization of early-stage oomycetes or nutrient recycling to mount defences. Chapter Five shows the results on a screening of ca. 40 strains from different brown algal orders, to phenotype cellular defense markers against two phylogenetic distant pathogens (Anisolpidium ectocarpii and Maullinia ectocarpii). Overall, responses such as cell wall re-arrangements, programmed cell death, autophagy and ROS accumulation were confirmed to be at least partially conserved across different Phaeophycean lineages. Chapter 6 reports a boost on the phlorotannin metabolism in the model brown alga Ectocarpus (e.g. physode formation and polyketide synthase gene expression) after pathogen challenging, suggesting a similar protective role of this molecule as against grazers and deleterious light regimes. Phlorotannins role however needs to be elucidated.
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The application of molecular tools towards the study of brown algal chemical ecology and the production of phlorotanninsPelletreau, Karen Nicole. January 2008 (has links)
Thesis (Ph.D.)--University of Delaware, 2008. / Principal faculty advisor: Nancy M. Targett, College of Marine & Earth Studies. Includes bibliographical references.
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studies on the brown alga dictyopteris longifolia (Dictyotales), with special reference to the effects of wave actionBlackmore, Natalie Lynn 05 August 2016 (has links)
A the'.is submitted to the Faculty of Science, University
of the Witwatersrand, Johannesburg, in the fulfillment of
the requirements of the Degree of Magister Scientae.
June 1992 / Aspects of the brown alga Pict~'ppt;eris lQ..n..qifolia at. Palm
Beach, Natal, were investigated wi\'-;.hspecial reference to
the effect of wave expozu~e~
A description of the species is giv~n and the
nomencluture discussed. D~strib1i.ltion of n. ).or~gifolia was
det~rmimad from literature and herbarium speof.mens .
various r(\~:~thodosf measuring wave exposure were assessed
and review~~d. At'!;:.emptswere made to quantify sand
abrasion and deposition in tihe scudy si.tes.
Morphological and structural aspect;s of the cha LLus were
found to vary considerably with season and wave exposure"
Light and scanning electron microscopy studie.s indicated
the relatjvely complex cell organisation of this brown
alga.
The prolific regeneration from various thallus sections
of .Q. longifolia indicate that regenerat.ion is an
important survival strate 'JY following damage.
Sexual reproduction and tetrasporogenesis were
investigated. Sex.ual reproduction was not prolific in the
field, however, tetraspores were abundant and are
believed to be particul~rly importcmt in high wave
exposure areas.
11. _j.Q.ngi;f'clige,x_periences a range of environmental
conditions and responds to these with morphological,
structural and reproductive &daptations.
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Biomass productivity enhancement of Laminaria saccharina cultures in a stirred-tank bioreactor by batch and fed-batch nutrient deliveryRamanan, Sundar 17 December 1996 (has links)
Graduation date: 1997
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Transcript analysis of Feldmannia Sp. virus, FsV : characterization of the major capsid protein gene and its relationship to known virusesJia, Yibing 26 April 1996 (has links)
The Feldmannia sp. virus is a large icosahedral virus that persistently infects
marine brown alga Feldmannia sp.. So far, there is no information available about
viral genome replication, gene structure and gene expression in this unique viral-host
system. The purpose of this study was to characterize the general features of viral
transcripts in the virus producing sporophyte plants. Northern analysis, using four
cosmid clones that cover the entire viral genome, showed that there were six major
transcripts and at least eighteen minor transcripts in the virus producing sporophyte
plants. These transcripts are not evenly distributed in the viral genome. A 5.7 kb
BamHI fragment-R was found to encode a 1.5 kb and a 0.9 kb major transcript, and
those two major transcripts were chosen for detailed sequence analysis. The 1.5 kb
transcript was identified as the putative major capsid protein (MCP) gene. The FsV
MCP has significant similarity with the major capsid protein of Chlorella virus-PBCV-1 and with iridoviruses, fish lymphocystis disease virus, frog virus 3, and with African
swine fever virus. / Graduation date: 1996
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