The effects of the phytohormone strigolactone(SL)and smoke-derived karrikins(kars)on plants are generally distinct,despite the fact that they are perceived through very similar *** homologous receptors DWARF14(D14)and...
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The effects of the phytohormone strigolactone(SL)and smoke-derived karrikins(kars)on plants are generally distinct,despite the fact that they are perceived through very similar *** homologous receptors DWARF14(D14)and karRIKIn-InSEnSITIVE2(KAI2),together with the F-box protein MORE AXILLARY GROWTH2(MAX2),mediate SL and kar responses,respectively,by targeting different SMAX1-LIKE(SMXL)family proteins for *** mechanisms are putatively well-insulated,with D14-MAX2 targeting SMXL6,SMXL7,and SMXL8 and KAI2-MAX2 targeting SMAX1 and SMXL2 in Arabidopsis *** evidence challenges this *** investigated whether D14 can target SMAX1 and whether this occurs *** analysis indicates that the SL analog GR24 promotes D14-SMAX1 *** D14 shows weaker interactions with SMAX1 than with SMXL2 or SMXL7,D14 mediates GR24-induced degradation of SMAX1 in *** stress triggers SMAX1 degradation,which is protective,through SL biosynthesis and signaling ***,D14-SMAX1 crosstalk may be beneficial and not simply a vestige of the evolution of the SL pathway.
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