Identification and characterization of sorgomol synthase in sorghum strigolactone biosynthesis

Strigolactones, first identified as germination stimulants for root parasitic weeds, act as endogenous phytohormones regulating shoot branching and as root-derived signal molecules mediating symbiotic communications in the rhizosphere

Takatoshi Wakabayashi; Shunsuke Ishiwa; Kasumi Shida; Noriko Motonami; Hideyuki Suzuki; Hirosato Takikawa; Masaharu Mizutani; Yukihiro Sugimoto

2021

Key concepts

Scholarcy highlights

  • Strigolactones, first identified as germination stimulants for root parasitic weeds, act as endogenous phytohormones regulating shoot branching and as root-derived signal molecules mediating symbiotic communications in the rhizosphere
  • Canonical SLs typically have an ABCD ring system and can be classified into orobanchol- and strigol-type based on the C-ring stereochemistry
  • Diverse canonical SLs are chemically modified with one or more hydroxy or acetoxy groups introduced into the A- and/or B-ring of these simplest structures, but the biochemical mechanisms behind this structural diversity remain largely unexplored
  • Recombinant SbCYP728B35 catalyzed the conversion of 5DS to sorgomol in vitro
  • SbCYP728B35 expression was not detected in nonsorgomol-producing cultivar, Abu70, suggesting that this gene is responsible for sorgomol production in sorghum
  • Identification of the mechanism modifying parental 5DS of strigol-type SLs provides insights on how plants biosynthesize diverse SLs

Need more features? Save interactive summary cards to your Scholarcy Library.