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  • Articles  (6)
  • Other Sources
  • somatic embryogenesis  (3)
  • transgenic plants  (3)
  • Springer  (6)
  • 1955-1959  (6)
  • 1
    Electronic Resource
    Electronic Resource
    The embryogenic potential of rice cell suspensions affects their recovery following cryogenic storage (1955)
    Springer
    Euphytica 85 (1955), S. 347-349 
    Details
    ISSN: 1573-5060
    Keywords: Oryza sativa L. cv. Taipei 309 ; rice ; cryogenic storage ; somatic embryogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The rates of recovery from cryogenic storage of suspension cultures of the Japonica rice cultivar Taipei 309, as determined by the reduction of triphenyl tetrazolium chloride and cell regrowth, were significantly influenced by the embryogenic potential of the non-frozen cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023966
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synergistic activity of chitinases and β-1,3-glucanases enhances fungal resistance in transgenic tomato plants (1955)
    Springer
    Euphytica 85 (1955), S. 173-180 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; endochitinases ; β-1,3-endoglucanases ; fungal resistance ; transgenic plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Simultaneous expression of a tobacco class I chitinase and a class I β-1,3-glucanase gene in tomato resulted in increased fungal resistance, whereas transgenic tomato plants expressing either one of these genes were not protected against fungal infection. After infection with Fusarium oxysporum f.sp. lycopersici, a 36% to 58% reduction in disease severity was observed in resistant tomato lines. Two transgenic lines largely recovered from the initial infection by the time wild-type tomato plants had died. The overall results are consistent with the observation that class I chitinases and class I β-1,3-glucanases synergistically inhibit the growth of fungi in vitro and provide the first experimental support to the hypothesis that such synergy can contribute to enhanced fungal resistance in planta.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023946
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  • 3
    Electronic Resource
    Electronic Resource
    The release of transgenic plants from containment, and the move towards their widespread use in agriculture (1955)
    Springer
    Euphytica 85 (1955), S. 425-431 
    Details
    ISSN: 1573-5060
    Keywords: consumer ; food ; genetic modification ; transgenic plants ; risk assessment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The use of transgenic plants in breeding makes it possible to utilise a wide variety of novel genes from unrelated plants, microbes and animals. Because of the diversity of genes that have now become available for modifying crop plants, it is agreed internationally that there should be a risk assessment before transgenic plants are grown outside the laboratory or glasshouse. Various aspects are considered in a risk assessment including any non-target effects of the transgene, changes in plant persistence and invasiveness, and the possibility of movement of the transgenes to wild populations by cross pollination. It is generally argued that the need for risk assessment and regulation should be determined by an analysis of certain products of transformation, rather than a risk assessment being required for all plants modified by the process of transformation. A possible consequence of considering the product only, however, could be that some of the products of conventional breeding may need to be assessed by the risk assessment procedures developed for transgenic plants. There are discussions with interest groups on the use of transgenic plants in the environment and in food products. It is likely that some form of labelling will be required for certain foods containing ethically-sensitive genes. There is little doubt that transgenic plants will make a significant contribution to agriculture in the coming decades. Developments in the patenting of genes, release regulations, food labelling, consumer reaction etc., will influence the rate of progress and should be considered in the strategic planning of plant breeding programmes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023976
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of tissue culture-derived variation in pea (Pisum sativum L.)-preliminary results (1955)
    Springer
    Euphytica 85 (1955), S. 335-339 
    Details
    ISSN: 1573-5060
    Keywords: callus culture ; organogenesis ; pea ; Pisum sativum ; somaclonal variation ; somatic embryogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The possibility of producing agronomically-useful somaclones via organogenesis and somatic embryogenesis from callus cultures of pea (Pisum sativum L.) was studied. Organogenic calli were induced from immature leaflets on MSB medium with NAA and BAP. Embryogenic calli were derived either from immature zygotic embryos (using 2,4-D) or from shoot apices (using picloram) of aseptically-germinated seedlings. The seed progenies (T1 to T3-generation) of primary regenerants were grown in field conditions and their phenotypic variation was evaluated and compared with control, non-tissue culture-derived plant material. In addition, electrophoretic analyses of selected isoenzyme systems and total proteins have been done. The results do not show dramatic changes in qualitative and quantitative traits. The evaluation of at least two future generations (T4, T5) is planned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023964
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  • 5
    Electronic Resource
    Electronic Resource
    Monitoring genetic fidelity vs somaclonal variation in Norway spruce (Picea abies) somatic embryogenesis by RAPD analysis (1955)
    Springer
    Euphytica 85 (1955), S. 341-345 
    Details
    ISSN: 1573-5060
    Keywords: Picea abies ; genetic stability ; somatic embryogenesis ; RAPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Somaclonal variation, which is a welcome source of genetic variation for crop breeding, is unwanted when direct regenerants have to be used in tissue culture mass propagation (eg. in many forest trees), or in the regeneration of genetically transformed plants. Random amplified polymorphic DNA (RAPD) was used to analyse somatic embryos and plants regenerated from embryogenic cell lines in Norway spruce, Picea abies (L.) Karst. RAPD facilitated the identification of clones, as material from the same cell lines shared identical patterns of amplified fragments, whereas regenerants from different cell lines were easily distinguishable by their respective patterns. For comparisons with explant donor genotypes, cell lines were initiated from cotyledons. Some of the seedlings that had parts of their cotyledons removed were grown on as control plants. Somatic embryos regenerated from cotyledon cell lines showed no aberrations in RAPD banding patterns with respect to donor plants. We conclude that gross somaclonal variation is absent in our plant regeneration system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023965
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  • 6
    Electronic Resource
    Electronic Resource
    Strategies for variety-independent genetic transformation of important cereals, legumes and woody species utilizing particle bombardment (1955)
    Springer
    Euphytica 85 (1955), S. 13-27 
    Details
    ISSN: 1573-5060
    Keywords: gene transfer ; crop species ; particle bombardment ; transgenic plants ; cereals ; legumes ; woody plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The limiting component in the creation of transgenic crops has been the lack of effective means to introduce foreign genes into elite germplasm. However, the development of novel direct DNA transfer methodology, by-passing limitations imposed by Agrobacterium-host specificity and cell culture constraints, has allowed the engineering of almost all major crops, including formerly recalcitrant cereals, legumes and woody species. The creation of transgenic rice, wheat, maize, barley, oat, soybean, phaseolus, peanut, poplar, spruce, cotton and others, in an efficient and in some cases, variety-independent fashion, is a significant step towards the routine application of recombinant DNA methodology to the improvement of most important agronomic crops. In this review we will focus on key elements and advantages of particle bombardment technology in order to evaluate its impact on the accelerated commercialization of products based on agricultural biotechnology and its utility in studying basic plant developmental processes and function through transgenesis. Fundamental differences between conventional gene transfer methods, utilizing Agrobacterium vectors or protoplast/suspension cultures, and particle bombardment will be discussed in depth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023926
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