Strigolactones: Destruction-Dependent Perception?

SL biosynthesis from b-carotene requires the sequential action of D27, CCD7, CCD8 and MAX1 proteins, while D14 and MAX2 are required for SL response

Steven M. Smith; Mark T. Waters

2012

Scholarcy highlights

  • SL biosynthesis from b-carotene requires the sequential action of D27, CCD7, CCD8 and MAX1 proteins, while D14 and MAX2 are required for SL response
  • A new study reported in this issue of Current Biology by Hamiaux et al provides evidence that a D14-type protein discovered in petunia plays a central role in SL metabolism, perception and signalling
  • It was further shown that GR24 triggers interaction between wild-type DAD2 and an F-box protein, PhMAX2A, in a yeast two-hybrid assay
  • While the experiments reported by Hamiaux et al are open to re-interpretation, the fact that each result depends on both GR24 and the catalytic triad of DAD2, provides compelling evidence in favour of the proposed model
  • SLs could play a key role since they coordinate plant growth with nutrient availability and provide a signal for colonisation of roots by arbuscular mycorrhizal fungi which acquire nutrients from the soil for the host plant

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