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Specialisation within the DWARF14 protein family confers distinct responses to karrikins and strigolactones in Arabidopsis
TLDR
The results support the existence of an endogenous, butenolide-based signalling mechanism that is distinct from the strigolactone pathway, providing a molecular basis for the adaptive response of plants to smoke. Expand
A Compound from Smoke That Promotes Seed Germination
TLDR
It is shown that butenolide 3-methyl-2H-furo[2,3-c]pyran-2-one promotes germination of a number of plant species at a level similar to that observed with plant-derived smoke water. 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
Strigolactone Hormones and Their Stereoisomers Signal through Two Related Receptor Proteins to Induce Different Physiological Responses in Arabidopsis1[W]
TLDR
The results support the conclusion that KAI2-dependent signaling does not respond to canonical SLs and the use of specific stereoisomers might provide valuable information about the specific perception systems operating in different plant tissues, parasitic weed seeds, and arbuscular mycorrhizae. Expand
Rice cytochrome P450 MAX1 homologs catalyze distinct steps in strigolactone biosynthesis.
TLDR
It is reported that two members of CYP711 enzymes can catalyze two distinct steps in SL biosynthesis, identifying the first enzymes involved in B-C ring closure and a subsequent structural diversification step of SLs. Expand
Seed germination of agricultural weeds is promoted by the butenolide 3-methyl-2H-furo[2,3-c]pyran-2-one under laboratory and field conditions
TLDR
Experiments using B. tournefortii seeds collected from several locations across Western Australia and in different growing seasons found that these factors significantly influence the butenolide response, implying a role of the maternal environment in seed germination/dormancy characteristics. 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
Destabilization of strigolactone receptor DWARF14 by binding of ligand and E3-ligase signaling effector DWARF3
TLDR
D14 is destabilized upon the binding of ligands and D3, thus revealing an unusual mechanism of SL recognition and signaling, in which the hormone, the receptor, and the downstream effectors are systematically destabilized during the signal transduction process. Expand
Substrate-Induced Degradation of the α/β-Fold Hydrolase KARRIKIN INSENSITIVE2 Requires a Functional Catalytic Triad but Is Independent of MAX2.
TLDR
Genetic and biochemical studies have identified KARRIKIN INSENSITIVE2 (KAI2) as a putative karrikin receptor protein, an α/β-fold hydrolase and a paralog of DWARF14 (D14; AtD14 in Arabidopsis). Expand
Karrikins Discovered in Smoke Trigger Arabidopsis Seed Germination by a Mechanism Requiring Gibberellic Acid Synthesis and Light1[W][OA]
TLDR
It is demonstrated that Arabidopsis (Arabidopsis thaliana), an ephemeral of the temperate northern hemisphere that has never, to the authors' knowledge, been reported to be responsive to fire or smoke, rapidly and sensitively perceives karrikins and may have greater significance among angiosperms than previously realized. Expand
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