Sökning: "Spore size"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Spore size.

  1. 1. The ecological significance of sexual reproduction in peat mosses (Sphagnum)

    Författare :Sebastian Sundberg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Bryophyte; colonisation; disturbance; experiment; longevity; mire; safe site; spore; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Peat mosses (Sphagnum) are widely distributed and are a major component of mire vegetation and peat throughout the boreal and temperate regions. Most boreal Sphagnum species regularly produce sporophytes, but the ecological role of the spore has been questioned. LÄS MER

  3. 2. Dispersal of bryophytes across landscapes

    Författare :Niklas Lönnell; Kristoffer Hylander; Bengt Gunnar Jonsson; Sebastian Sundberg; Johan Ehrlén; Risto Virtanen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; anemochory; bryophytes; colonization; connectivity; diaspores; dispersal kernel; establishment; spore dispersal; long-distance dispersal; mechanistic model; mosses; realized dispersal; spore release; Lagrangian stochastic model; wind dispersal; Plant Ecology; växtekologi;

    Sammanfattning : Dispersal, especially long-distance dispersal, is an important component in many disciplines within biology. Many species are passively dispersed by wind, not least spore-dispersed organisms.In this thesis I investigated the dispersal capacity of bryophytes by studying the colonization patterns from local scales (100 m) to landscape scales (20 km). LÄS MER

  4. 3. Genetic variation and sexual reproduction in a moss with dwarf males, Homalothecium lutescens

    Författare :Frida Rosengren; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bryophytes; mosses; dwarf males; sexual reproduction; genetic variation; genetic structure; inbreeding; isozymes; allozymes; SNP; sporophytes; spore; fertilization; fertility;

    Sammanfattning : Dwarf males occur in many unrelated groups of organisms. Among land plants they are unique to mosses. Moss dwarf males originate from male spores that land and germinate on the female where their final size is restricted to a few mm. Fertilization in mosses occur over short distances with swimming spermatozoids. LÄS MER

  5. 4. Establishment of Heterobasidion annosum s.l. infections in young Norway spruce dominated stands : implications for silviculture

    Författare :Anna Gunulf; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : One of the worst pathogens on Norway spruce, Heterobasidion annosum s.l., can establish in previously healthy trees by spores landing on freshly made stumps from where mycelia can grow via root grafts and contacts to the adjacent tree. LÄS MER

  7. 5. Zygomycetes and cellulose residuals : hydrolysis, cultivation and applications

    Författare :Patrik Lennartsson; Högskolan i Borås; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; zygomycetes; fungi; lignocelluloses; ethanol; fish feed; animal feed; dimorphism; airlift; pretreatment; Biotechnology; Resursåtervinning; Resource Recovery;

    Sammanfattning : Zygomycetes is a class of fungi living worldwide as saprobes, as part of mycorrhizae, and as parasites. Humans have used some zygomycetes for centuries in the production of traditional foods, e.g. Indonesian tempe. LÄS MER