Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The Medicago truncatula ortholog of Arabidopsis EIN2, sickle, is a negative regulator of symbiotic and pathogenic microbial associations

    Access Status
    Open access via publisher
    Authors
    Penmetsa, R.
    Uribe, P.
    Anderson, J.
    Lichtenzveig, Judith
    Gish, John-Charles
    Nam, Young Woo
    Engstrom, Eric
    Xu, Kun
    Sckisel, Gail
    Pereira, Mariana
    Baek, Jong Min
    Lopez-Meyer, Melina
    Long, Sharon R.
    Harrison, Maria J.
    Singh, Karam B.
    Kiss, Gyorgy B.
    Cook, Douglas R.
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Penmetsa, R. Varma and Uribe, Pedro and Anderson, Jonathan and Lichtenzveig, Judith and Gish, John-Charles and Nam, Young Woo and Engstrom, Eric et al 2008. The Medicago truncatula ortholog of Arabidopsis EIN2, sickle, is a negative regulator of symbiotic and pathogenic microbial associations. The Plant Journal. 55 (4): pp. 580-595.
    Source Title
    The Plant Journal
    DOI
    10.1111/j.1365-313X.2008.03531.x
    ISSN
    1365-313X
    School
    Department of Environment and Agriculture
    Remarks

    Copyright © 2008 The Authors

    URI
    http://hdl.handle.net/20.500.11937/19692
    Collection
    • Curtin Research Publications
    Abstract

    The plant hormone ethylene negatively regulates bacterial infection and nodule formation in legumes in response to symbiotic rhizobia, but the molecular mechanism(s) of ethylene action in symbiosis remain obscure. We have identified and characterized multiple mutant alleles of the MtSkl1 gene, which controls both ethylene sensitivity and nodule numbers. We show that this locus encodes the Medicago truncatula ortholog of the Arabidopsis ethylene signaling protein EIN2. In addition to the well-characterized role of MtSkl1 in rhizobial symbiosis, we show that MtSkl1 is involved in regulating early phases of the symbiotic interaction with mycorrhizal fungi, and in mediating root responses to cytokinin. MtSkl1 also functions in the defense against Rhizoctonia solani and Phytophthora medicaginis, with the latter interaction likely to involve positive feedback amplification of ethylene biosynthesis. Overexpression of the C-terminal domain of MtEIN2 is sufficient to block nodulation responses, consistent with previous reports in Arabidopsis on the activation of ethylene signaling. This same C-terminal region is uniquely conserved throughout the EIN2 homologs of angiosperms, which is consistent with its role as a higher plant-specific innovation essential to EIN2 function.

    Related items

    Showing items related by title, author, creator and subject.

    • The B-3 Ethylene Response Factor MtERF1-1 Mediates Resistance to a Subset of Root Pathogens in Medicago truncatula without Adversely Affecting Symbiosis with Rhizobia
      Anderson, J.; Lichtenzveig, Judith; Gleason, C.; Oliver, Richard; Singh, K (2010)
      The fungal necrotrophic pathogen Rhizoctonia solani is a significant constraint to a range of crops as diverse as cereals, canola, and legumes. Despite wide-ranging germplasm screens in many of these crops, no strong ...
    • The B-3 Ethylene Response Factor MtERF1-1 Mediates Resistance to a Subset of Root Pathogens in Medicago truncatula without Adversely Affecting Symbiosis with Rhizobia
      Anderson, J.; Lichtenzveig, Judith; Gleason, C.; Oliver, Richard; Singh, K. (2010)
      The fungal necrotrophic pathogen Rhizoctonia solani is a significant constraint to a range of crops as diverse as cereals, canola,and legumes. Despite wide-ranging germplasm screens in many of these crops, no strong genetic ...
    • Significance of lung nodules detected on chest CT among adult Aboriginal Australians – a retrospective descriptive study
      Ng, L.Y.; Howarth, T.P.; Doss, Arockia ; Charakidis, M.; Karanth, N.V.; Mo, L.; Heraganahally, S.S. (2024)
      Introduction: There are limited data on chest computed tomography (CT) findings in the assessment of lung nodules among adult Aboriginal Australians. In this retrospective study, we assessed lung nodules among a group of ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.