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  • Articles: DFG German National Licenses  (2)
  • Sahel  (1)
  • Seedling mortality  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The effect of water stress on the mortality ofBetula pendula Roth. andBuddleia davidii Franch. seedlings (1982)
    Springer
    Plant and soil 64 (1982), S. 273-276 
    Details
    ISSN: 1573-5036
    Keywords: Betula pendula ; Buddleia davidii ; Polyethylene glycol ; Seedling mortality ; Soil matric potential ; Water stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A simple container is described whereby small seedlings may be grown at controlled levels of water stress. The water stress was induced in the soil by an osmoticum which is separated from the soil by a semi-permeable membrane. The mortality ofBetula pendula seedlings was markedly increased at a matric potential of −1.6 bars whereas the mortality ofBuddleia davidii was only affected below −2.8 bars. This difference in tolerance to water stress at the seedling stage might not be reflected in the distribution of the species in the colonisation of chalk and sand pits in England unless there is a dry spring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02184261
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Germplasm collections of endangered agroforestry tree species: the case of Prosopis africana in the semi-arid lowlands of West Africa (1997)
    Springer
    Agroforestry systems 39 (1997), S. 91-100 
    Details
    ISSN: 1572-9680
    Keywords: long-term conservation ; Sahel ; seed collection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The International Centre for Research in Agroforestry (ICRAF) coordinates a research network in the Semi-arid Lowlands of West Africa (SALWA) in four countries: Burkina Faso, Niger, Mali and Senegal. Prosopis africana, an important agroforestry tree species is seriously threatened in this eco-region. ICRAF organized seed collections of this species for long-term conservation and subsequent utilization by small-scale farmers in the West African Sahel. Prior to the collection, ICRAF, the International Plant Genetic Resources Institute (IPGRI) and International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) organized a planning workshop with collaborating national research institutes. Out of this workshop came a consensus on the strategy, logistics and choice of collection sites. To collect as much genetic diversity of P. africana in the SALWA region as possible, 34 collection sites were selected: 15 in Niger, eight in Mali, seven in Burkina Faso and four in Senegal. The main aim of the collection was to capture the genetic diversity within P. africana before the valuable genetic resources are lost. This paper reviews the methodology and results of the germplasm collection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005887706700
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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