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  • Wiley-Blackwell  (2)
  • Munksgaard International Publishers  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Phytohormonal responses in enod40-overexpressing plants of Medicago truncatula and rice (2004)
    Oxford, UK; Malden , USA : Munksgaard International Publishers
    Physiologia plantarum 120 (2004), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Phytohormones are well-known regulators of the symbiotic Rhizobium–legume association in the plant host. The enod40 nodulin gene is associated with the earliest phases of the nodule organogenesis programme in the legume host and modifying its expression resulted in perturbations of nodule development in Medicago truncatula. Therefore in our pursuit to mimic the initial signal transduction steps of legume nodulation in the alien physiological set-up of a rice plant, we have expressed the Mtenod40 gene in rice. Molecular data confirm the stable integration, inheritance and transcription of the foreign gene in this non-legume. We have compared the phytohormonal responses of Mtenod40-overexpressing and control plants in a homologous legume background (M. truncatula) and in the non-legume rice. An enod40-mediated root growth response, induced by inhibition of ethylene biosynthesis, was observed in both plants. On the other hand, a significant differential effect of cytokinins was observed only in rice plants. This suggests that ethylene inhibits enod40 action both in legumes and non-legumes and reinforces that some of the early signal transduction steps of the nodule developmental programme may function in rice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0031-9317.2004.0208.x
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  • 2
    Electronic Resource
    Electronic Resource
    Complete sequence of a Rhizobium plasmid carrying genes necessary for symbiotic association with the plant host (1997)
    New York, NY : Wiley-Blackwell
    BioEssays 19 (1997), S. 843-846 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The soil bacteria rhizobia have the capacity to establish nitrogen-fixing symbiosis with their leguminous host plants. In most Rhizobium species the genes for nodule development and nitrogen fixation have been localized on large indigenous plasmids that are transmissible, allowing lateral transfer of symbiotic functions. A recent paper reports on the complete sequencing of the symbiotic plasmid pNGR234a from Rhizobium species NGR234(1), revealing not only putative new symbiotic genes but also possible mechanisms for evolution and lateral dispersal of symbiotic nitrogen-fixing abilities among rhizobia.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950191003
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  • 3
    Electronic Resource
    Electronic Resource
    Transduction of plant signal molecules by the Rhizobium NodD proteins (1991)
    New York, NY : Wiley-Blackwell
    BioEssays 13 (1991), S. 575-581 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The regulatory NodD proteins of Rhizobium bacteria mediate the activation of a gene set responsible for symbiotic nodule formation by plant signal molecules. Here we discuss the signal recognition and gene activation properties of NodD and present a model summarizing the current knowledge on NodD action.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950131106
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