Sökning: "symbiont"

Visar resultat 1 - 5 av 19 avhandlingar innehållade ordet symbiont.

  1. 1. The Nostoc Symbiont of Lichens : Diversity, Specificity and Cellular Modifications

    Författare :Per Paulsrud; Jack Meeks; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; fysiologisk botanik; Physiological Botany;

    Sammanfattning : Cyanobacteria belonging to the genus Nostoc have the capacity to form symbiotic associations with a wide range of organisms. Diversity, specificity and cellular modifications of the symbiosis between Nostoc and fungi in the formation of lichens were investigated in this thesis. LÄS MER

  2. 2. Coral reefs in the Anthropocene : The effects of stress on coral metabolism and symbiont composition

    Författare :Suzanne Faxneld; Michael Tedengren; Alina Szmant; Stockholms universitet; []
    Nyckelord :Corals; Disturbance; Galaxea fascicularis; ITS2; Metabolism; mtDNA; Pollution; Porites lutea; Symbiodinium; Temperature; Turbinaria mesenterina; Vietnam; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Coral reefs constitute some of the most prolific and diverse ecosystems on our planet, but also among the most threatened. This thesis investigates the effects of environmental stressors on corals’ metabolism and symbiont diversity. LÄS MER

  3. 3. Insights into the ecology and genetics of lichens with a cyanobacterial photobiont

    Författare :Katja Fedrowitz; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; LANTBRUKSVETENSKAPER; NATURAL SCIENCES; AGRICULTURAL SCIENCES;

    Sammanfattning : Nature conservation requires an in-depth understanding of the ecological processes that influence species persistence in the different phases of a species life. In lichens, these phases comprise dispersal, establishment, and growth. LÄS MER

  4. 4. Sex and symbionts : New discoveries in local and regional patterns of coral ecology and reproduction

    Författare :Micaela Hellström; Michael Tedengren; Mats Grahn; John A. H. Benzie; Nancy Knowlton; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Indo-Pacific; S. elegans; G. fascicularis; Symbiodinium; size; reproduction; allozymes; ITS2; mtDNA; geography; environment; Marine ecology; Marin ekologi; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Coral reefs belong to the most diverse and the most threatened ecosystems on earth. Anthropogenic stressors and climate change have led to mortalities at levels unprecedented in modern times. The aims of this thesis are to investigate aspects of the corals’ ability to reproduce, disperse, adapt and survive. LÄS MER

  5. 5. Significance of N2 fixing planktonic symbioses for open ocean ecosystems

    Författare :Marcus Stenegren; Rachel A. Foster; Agneta Andersson; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; nitrogen fixation; diazotrophs; symbiosis; DDA; cyanobacteria; qPCR; piecewise SEM; microarray; tropics; subtropics; marine; open ocean; Richelia; Calothrix; marin ekologi; Marine Ecology;

    Sammanfattning : Di-nitrogen (N2) fixers, also called diazotrophs, are able to reduce atmospheric N2 into bioavailable nitrogen, giving them an advantage in open ocean regions with low dissolved inorganic nitrogen concentrations. The focus of this thesis are three lineages of symbiotic heterocystous filamentous types (het-1, het-2 and het-3), that associate with several genera of microalgae called diatoms (collectively referred to as Diatom Diazotroph Associations, DDAs). LÄS MER