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    Karrikin and cyanohydrin smoke signals provide clues to new endogenous plant signaling compounds

    Access Status
    Open access via publisher
    Authors
    Flematti, G.
    Waters, M.
    Scaffidi, A.
    Merritt, D.
    Ghisalberti, E.
    Dixon, Kingsley
    Smith, S.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Flematti, G. and Waters, M. and Scaffidi, A. and Merritt, D. and Ghisalberti, E. and Dixon, K. and Smith, S. 2013. Karrikin and cyanohydrin smoke signals provide clues to new endogenous plant signaling compounds. Molecular Plant. 6 (1): pp. 29-37.
    Source Title
    Molecular Plant
    DOI
    10.1093/mp/sss132
    ISSN
    1674-2052
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/24012
    Collection
    • Curtin Research Publications
    Abstract

    Two new types of signaling compounds have been discovered in wildfire smoke due to their ability to stimulate seed germination. The first discovered were karrikins, which share some structural similarity with the strigolactone class of plant hormones, and both signal through a common F-box protein. However, karrikins and strigolactones operate through otherwise distinct signaling pathways, each distinguished by a specific α/β hydrolase protein. Genetic analysis suggests that plants contain endogenous compounds that signal specifically through the karrikin pathway. The other active compounds discovered in smoke are cyanohydrins that release germination-stimulating cyanide upon hydrolysis. Cyanohydrins occur widely in plants and have a role in defense against other organisms, but an additional role in endogenous cyanide signaling should also now be considered.

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    • F-box protein MAX2 has dual roles in karrikin and strigolactone signaling in Arabidopsis thaliana
      Nelson, D.; Scaffidi, A.; Dun, E.; Waters, M.; Flematti, G.; Dixon, Kingsley; Beveridge, C.; Ghisalberti, E.; Smith, S. (2011)
      Smoke is an important abiotic cue for plant regeneration in postfire landscapes. Karrikins are a class of compounds discovered in smoke that promote seed germination and influence early development of many plants by an ...
    • What are karrikins and how were they 'discovered' by plants?
      Flematti, G.; Dixon, Kingsley; Smith, S. (2015)
      © 2015 Flematti et al. Karrikins are a family of compounds produced by wildfires that can stimulate the germination of dormant seeds of plants from numerous families. Seed plants could have 'discovered' karrikins during ...
    • Regulation of seed germination and seedling growth by chemical signals from burning vegetation
      Nelson, D.; Flematti, G.; Ghisalberti, E.; Dixon, Kingsley; Smith, S. (2012)
      It is well known that burning of vegetation stimulates new plant growth and landscape regeneration. The discovery that char and smoke from such fires promote seed germination in many species indicates the presence of ...
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