Karrikins Discovered in Smoke Trigger Arabidopsis Seed Germination by a Mechanism Requiring Gibberellic Acid Synthesis and Light1[W][OA]

@article{Nelson2008KarrikinsDI,
  title={Karrikins Discovered in Smoke Trigger Arabidopsis Seed Germination by a Mechanism Requiring Gibberellic Acid Synthesis and Light1[W][OA]},
  author={David C. Nelson and Julie-Anne Riseborough and Gavin R. Flematti and J C Stevens and Emilio L. Ghisalberti and Kingsley W. Dixon and Steven M. L. Smith},
  journal={Plant Physiology},
  year={2008},
  volume={149},
  pages={863 - 873}
}
Discovery of the primary seed germination stimulant in smoke, 3-methyl-2H-furo[2,3-c]pyran-2-one (KAR1), has resulted in identification of a family of structurally related plant growth regulators, karrikins. KAR1 acts as a key germination trigger for many species from fire-prone, Mediterranean climates, but a molecular mechanism for this response remains unknown. We demonstrate that Arabidopsis (Arabidopsis thaliana), an ephemeral of the temperate northern hemisphere that has never, to our… Expand
Karrikins delay soybean seed germination by mediating abscisic acid and gibberellin biogenesis under shaded conditions
TLDR
It is reported that KAR delayed soybean seed germination through enhancing abscisic acid (ABA) biosynthesis, while impairing gibberellin (GA) biogenesis, and inhibit soybean seeds germination by mediating the ratio between GA and ABA biogenesis. Expand
F-box protein MAX2 has dual roles in karrikin and strigolactone signaling in Arabidopsis thaliana
TLDR
Karrikin signaling requires the F-box protein MAX2, which also mediates responses to the structurally-related strigolactone family of phytohormones, and it is shown that plants can distinguish between these signals. Expand
Karrikins: A new family of plant growth regulators in smoke
TLDR
The discovery that karrikins trigger seed germination and control seedling growth in taxa that would rarely experience fire indicates that their significance could extend far beyond fire ecology. Expand
Karrikins enhance light responses during germination and seedling development in Arabidopsis thaliana
TLDR
A role for karrikins is revealed in priming light responses in the emerging seedling, and the influence of kAR1 on postfire ecology may not be limited to germination recruitment. Expand
Karrikins: Regulators Involved in Phytohormone Signaling Networks during Seed Germination and Seedling Development
TLDR
The crosstalk between KARs and phytohormones in regulating seed germination and seedling development and that between Karrikins and IAA during shade responses are discussed. Expand
Smoke signals and seed dormancy
TLDR
Observations suggest that lineage-specific evolution of MAX2 may have given rise to specialized responses to these signaling molecules, and that this signaling system could have an ancient origin. Expand
Regulation of seed germination and seedling growth by chemical signals from burning vegetation.
TLDR
It is hypothesize that chemical similarity between karrikins and strigolactones provided the opportunity for plants to employ a common signal transduction pathway to respond to both types of compound, while tailoring specific developmental responses to these distinct environmental signals. Expand
SUPPRESSOR OF MORE AXILLARY GROWTH2 1 Controls Seed Germination and Seedling Development in Arabidopsis1[W][OPEN]
TLDR
It is concluded that SMAX1 is an important component of Karrikin- and strigolactone-insensitive mutant max2 signaling during seed germination and seedling growth but not necessary for all MAX2-dependent responses. Expand
Transcriptome analysis of germinating maize kernels exposed to smoke-water and the active compound KAR1
TLDR
It is demonstrated that although smoke-water and KAR1 treatment of maize kernels result in a similar physiological response, the gene expression and the protein ubiquitination patterns are quite different. Expand
Karrikins Reduce the Hypocotyl Length of Rapeseed (Brassica napus napus L.) under Continuous Red Light
Karrikins (KARs) are relatively simple molecules originating from the burning of plant material, which can enhance the germination of many species from fire-prone environments, but also for speciesExpand
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