Sökning: "physiological dormancy"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden physiological dormancy.

  1. 1. Seed dormancy and germination in an ecological context : comparative studies of annual weeds

    Författare :Laila Karlsson; Per Milberg; Ken Thompson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asteraceae; Bidens; Compositae; deadnettle; Galinsoga; germination timing; Guizotia; evolution; Labiatae; Lamiaceae; Lamium; morphophysiological dormancy; Papaveraceae; Papaver; Parthenium; physiological dormancy; poppy; summer annual; Tagetes; Verbesina; winter annual; Biology; Biologi;

    Sammanfattning : Germination ecology studies, i.e. studies of interactions between characteristics of the seeds and environmental circumstances, provide understanding of spatial and temporal patterns of emergence of wild species, as weeds in the field. A large number of species have seed dormancy, i. LÄS MER

  3. 2. Molecular control of activity - dormancy transitions in Populus

    Författare :Madeleine Englund; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Perennials such as woody plants, growing in the high northern part of the earth have to cope with seasonal changes alternating between mild summer and the harsh winter periods. To survive and adapt their reproductive phase to the most favorable environmental conditions trees cycle between periods of active growth during summer and a state of growth arrest during winter, referred to as the activity- dormancy cycle. LÄS MER

  4. 3. Physiological status of bacteria used for environmental applications

    Författare :Ninwe Maraha; Janet K. Jansson; Charlotta Edlund; Soren J. Sorensen; Södertörns högskola; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Several bacteria have properties of interest for biotechnological applications, such as bioremediation of pollutants and biocontrol of plant pathogens. In order to perform their intended tasks in the environment the cells need to remain viable and active. LÄS MER

  5. 4. Molecular analysis of growth cessation and dormancy in hybrid aspen

    Författare :Szymon Tylewicz; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Perennial plants such as trees living in temperate zones experience extreme changes in temperature during summers and winters. In order to survive, shoot apical and cambial meristem undergo a transition from active growth to dormant state, well in advance of winter onset. LÄS MER

  7. 5. Studies of the physiological status of bacteria used for environmental applications

    Författare :Ninwe Maraha; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Today, it is difficult to study the physiological status of inoculants in complex environments, such as soil. In this thesis, we describe the combined use of marker genes and viability stains to determine the physiological status of the bacterial cells in pure cultures and in soil. LÄS MER