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  • Articles: DFG German National Licenses  (5)
  • 1980-1984  (4)
  • 1975-1979  (1)
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  • Articles: DFG German National Licenses  (5)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Biometrical studies of plant growth (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 1 (1978), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Relevant mathematical properties of the Richards function are described, along with references to its employment in previous work, and a brief description is given of some of the difficulties encountered in its use. Two introductory experiments were undertaken: firstly, applying the Richards function to leaf growth of Impatiens parviflora DC; and secondly, applying the function to artificial sets of data of differing variability and differing spreads of observation-values along the growth curve. The purpose of the latter analysis was an attempt to elucidate some problems of fitting and interpretation arising in the first experiment. It was concluded that the prime aim in experimental work generally is the acquisition of data covering as large a range of sizes as possible; low variability of the replicate observations, while desirable, is not so important.
In another series of experiments, plants of Impatiens parviflora were grown at four different temperatures in the range 13–23°C inclusive. In terms of leaf dry weight, increase in temperature decreased the final size attained and increased the mean relative growth rate; the curvature of the growth curve and the mean absolute growth rate were, however, temperature independent. These results are brought together in a simple model which shows clearly how temperature affects the course of leaf dry weight increase in these plants. The results for leaf area are less clear, but both the mean absolute and relative growth rates increased with rise in temperature. The final area of a leaf and the curvature of the growth curve seemed to be little affected by temperatures in the range 16–23°C, but there was some evidence of differences in these features in leaves growing at 13°C. No model summary was attempted for leaf area increase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1978.tb00759.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Carbon and nitrogen nutrition of nodulated roots of grain legumes (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 4 (1981), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The spatial and temporal relationships between carbon (C) metabolism and nitrogen (N) nutrition in grain legumes are of great academic interest with the added bonus that any data for economically important species may ultimately prove useful to breeders and growers. So far there are no data which can be used to relate differences in carbon usage by any symbiotic association with differences in economic yield. Much research has focussed on the dependence of dinitrogen fixation on photosynthate supply, on the C–N relationships of nodulated roots and nodules and on diurnal and seasonal profiles of dinitrogen fixation. In all these aspects a plethora of responses have been described, often based on insufficiently proven measurement techniques; consequently unequivocal conclusions cannot be drawn. We know little about within-species differences due to cultivar, strain of Rhi-zobium or environment, or about the proportions of any heritable variations which might be sufficiently large to merit inclusion among the selection criteria of grain legume breeders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1981.tb00831.x
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    Paper (German National Licenses)
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  • 3
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    Unknown
    Miller, "Responsibility Accounting and Performance Evaluations" (Book Review) (1983)
    Menasha, Wis. : Periodicals Archive Online (PAO)
    The Accounting Review. 58:1 (1983:Jan.) 202 
    Details
    ISSN: 0001-4826
    Topics: Economics
    Description / Table of Contents: BOOK REVIEWS, PHILIP E. MEYER, Editor
    Notes: Departments
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5030-1983-058-01-000049
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Changes in percentage organic carbon content during ontogeny (1984)
    Springer
    Planta 160 (1984), S. 97-101 
    Details
    ISSN: 1432-2048
    Keywords: Brassica ; Hordeum (C content) ; Carbon content ; Ontogeny and carbon content ; Temperature and carbon content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in percentage organic carbon content were assessed during the first five weeks of growth of Uniculm barley (Hordeum vulgare) and Brussels sprouts (Brassica oleracea) plants grown in controlled-environment conditions at two constant temperatures, 16° and 22°C. Foliage (leaf laminae), stem, and root material was assayed in both species, together with leaf sheaths of barley and cotyledon laminae of Brussels sprouts. In barley, there was a decline in percentage organic carbon content with increasing foliage age in plants grown at 22°C, but in sheath material there was no significant change at either temperature. Root material showed a decline in percentage carbon content at both growth temperatures, whereas stems showed the opposite trend. Similar results were found in Brussels sprouts, with an overall decline in percentage carbon content in foliage at 22°C and a rise in stem material at both growth temperatures. However, roots showed no significant change in percentage carbon content over the experimental period. The results demonstrate that percentage organic carbon content may change during plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392856
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Strain of Rhizobium effects on growth and seed yield of cowpeas (Vigna unguiculata) (1982)
    Springer
    Plant and soil 68 (1982), S. 249-260 
    Details
    ISSN: 1573-5036
    Keywords: Breeding ; Cowpea ; Nitrogen nutrition ; Rhizobium ; Seed yield ; Symbiotic interactions ; Vigna unguiculata L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Plant of cowpea (Vigna unguiculata (L.) Walp.) cv. TVu 1469 were grown in a plastic house set to simulate tropical temperatures. They were inoculated with one of two strains of Rhizobium and irrigated each day with nutrient solution either devoid of inorganic nitrogen (N) or containing 2.14 mM (30 ppm) N. Strain of Rhizobium significantly affected rates of dry matter and N accumulation as well as the total N content of mature plants. Variations in seed yield were due largely to Rhizobium effects on peduncle production and pod set on each peduncle, wheres inorganic N did not change these yield-determining components significantly. The agronomic and physiological implications of these data are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373711
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    Paper (German National Licenses)
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