Sökning: "embryo abortion"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden embryo abortion.

  1. 1. Male and female selective mechanisms, reproductive success and gene flow

    Författare :Samuel Kiboi; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; Plant ecology; Cucumis sativus.; genetic marker; gene flow; reproduction; embryo abortion; resistance; maternal selection; sexual selection; pollen competition; selection;

    Sammanfattning : In this thesis, I have studied male and female selective mechanisms that can affect plant reproductive success and gene flow. I have focussed on sexually selected traits, mainly pollen competition and maternal sorting mechanisms, for example through non-random ovule abortion. LÄS MER

  3. 2. Signalling mechanisms and epigenetic regulation of seed development in Arabidopsis thaliana

    Författare :Rita Batista; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In flowering plants, seed development starts with a double fertilisation event, leading to the formation of the embryo and the endosperm. Though only the embryo contributes to the next generation, control of endosperm proliferation, as well as the timing of its cellularisation are crucial for embryo viability. LÄS MER

  4. 3. New micromanipulative techniques in reproductive biology

    Författare :José Inzunza; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : New micro manipulative techniques have facilitated development to help patients who suffer from infertility and spontaneous abortion, as well as those who carry severe genetic diseases and have risks of delivering an affected child. Preimplantation genetic diagnosis (PGD), which is based on obtaining blastomere biopsy from an eight-cell embryo, has made it possible to diagnose severe defects caused by a genetic factor. LÄS MER

  5. 4. Regulatory pathways and virulence inhibition in Listeria monocytogenes

    Författare :Christopher Andersson; Jörgen Johansson; Debra Milton; Åke Forsberg; Claude Parsot; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Listeria monocytogenes; PrfA; ActA; infection; molekylärbiologi; Molecular Biology;

    Sammanfattning : Listeria monocytogenes is a rod-shaped Gram positive bacterium. It generally exist ubiquitously in nature, where it lives as a saprophyte. Occasionally it however enters the food chain, from where it can be ingested by humans and cause gastro-intestinal distress. In immunocompetent individuals L. LÄS MER

  7. 5. Regulatory roles of two small RNAs in the human pathogen Listeria monocytogenes and the evaluation of an alternative infection model

    Författare :Jonas Gripenland; Jörgen Johansson; Tom Geissmann; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; small RNA; sRNA; Riboswitch; Listeria monocytogenes; ncRNA; PrfA; molekylärbiologi; Molecular Biology;

    Sammanfattning : Listeriosis is a potentially lethal disease caused by the Gram-positive facultative intracellular pathogen Listeria monocytogenes (L.m.). L. LÄS MER