Sökning: "seedling development"

Visar resultat 6 - 10 av 16 avhandlingar innehållade orden seedling development.

  1. 6. Recruitment ecology and fungal interactions in mycoheterotrophic Ericaceae

    Författare :Veronika A. Johansson; Ove Eriksson; Andrew Taylor; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 454 Pyrosequencing; Dispersal limitation; Dust seeds; Ectomycorrhiza; Ericaceae; Microsite limitation; Monotropa hypopitys; Mycoheterotroph; Pyroleae; Seed limitation; Stable isotopes; Subterranean seedling; Symbiotic germination; Tricholoma; Plant Ecology; växtekologi;

    Sammanfattning : There are generally two contrasting alternatives to what limits recruitment in plants, namely the availability of seeds (seed limitation) or the quality or quantity of suitable sites (microsite limitation). Dust seeds, the smallest existing seeds, lack or have minimal nutrient reserves. LÄS MER

  3. 7. Planting and survivability of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) in Sweden : Questions of seedling storability, site preparation, bud burst timing and freezing tolerance

    Författare :Cecilia Malmqvist; Harald Säll; Douglass F. Jacobs; Linnéuniversitetet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; regeneration; provenances; coastal; interior; frost damage; Forestry and Wood Technology; Skog och träteknik;

    Sammanfattning : The non-native Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) has been grown to a limited extent in the southern part of Sweden since the early 1900s. A more extensive use has probably been curtailed by its known susceptibility to damage by frost, pine weevil and other pests. LÄS MER

  4. 8. TERMINAL FLOWER2, the Arabidopsis HETEROCHROMATIN PROTEIN1 Homolog, and its Involvement in Plant Development

    Författare :Katarina Landberg; Annika Sundås Larsson; Peter Engström; Ove Nilsson; Uppsala universitet; []
    Nyckelord :Biology; Arabidopsis; HETEROCHROMATIN PROTEIN1; flowering; meristem; auxin; Biologi;

    Sammanfattning : This thesis describes the characterization of the Arabidopsis thaliana mutant terminal flower2 (tfl2), the cloning of the corresponding gene, and the analysis of TFL2 function in plant development. The tfl2 mutant is pleiotropic, exhibiting early floral induction in both long and short day conditions, a terminating inflorescence and dwarfing. LÄS MER

  5. 9. Vision based perception systems for unmanned forestry machines

    Författare :Songyu Li; Magnus Karlberg; Håkan Lideskog; Torbjörn Lindbäck; Tomas Nordfjell; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Design; Maskinkonstruktion;

    Sammanfattning : After years of continuous development in the past decades, the field of forest production has achieved a notable degree of mechanization. Nonetheless, the unceasing demand for increased productivity in forestry operations continues to drive the rapid expansion of forestry automation. LÄS MER

  7. 10. Determination, characterisation and combination of novel resistance genes to stripe and stem rust in wheat

    Författare :Rimsha Ashraf; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Triticum aestivum L., commonly known as bread wheat, characterized by a chromosomal composition of 2n = 6x = 42 (AABBDD), is a significant source of dietary protein and daily calorie intake for much of the global population. Stripe rust (Puccinia striiformis Westend. f. LÄS MER