COMT,OsCOMT,OsCAldOMT1

2015-01-20 | Categories genes  | Tags disease  disease resistance  cytoplasm  melatonin  melatonin biosynthesis  methyltransferase  cell wall  leaf  leaf senescence  senescence  vascular bundle  development  grain  photosynthesis  grain filling  grain yield  yield  vascular development  chlorophyll 

• Information
  • Symbol: COMT,OsCOMT,OsCAldOMT1
  • MSU: LOC_Os08g06100
  • RAPdb: Os08g0157500
• Publication
  • OsCAD2 is the major CAD gene responsible for monolignol biosynthesis in rice culm, 2012, Plant Cell Rep.
  • Flavonoid 3’-O-methyltransferase from rice: cDNA cloning, characterization and functional expression, 2006, Phytochemistry.
  • Proteomic analysis of rice defense response induced by probenazole, 2008, Phytochemistry.
  • Melatonin biosynthesis requires N-acetylserotonin methyltransferase activity of caffeic acid O-methyltransferase in rice., 2015, J Exp Bot.
  • OsCAldOMT1 is a bifunctional O-methyltransferase involved in the biosynthesis of tricin-lignins in rice cell walls., 2019, Sci Rep.
  • OsCOMT, encoding a caffeic acid O-methyltransferase in melatonin biosynthesis, increases rice grain yield through dual regulation of leaf senescence and vascular development., 2022, Plant Biotechnol J.
• Genbank accession number
  • AK064768
• Key message
  • We propose that PAL, COMT, and GSTU17 are likely to confer PBZ-induced disease resistance via such functions as biosynthesis and transport of flavonoid-type phytoalexin and/or lignin biogenesis
  • Similar to AtCOMT, OsCOMT was localized in the cytoplasm
  • Melatonin biosynthesis requires N-acetylserotonin methyltransferase activity of caffeic acid O-methyltransferase in rice
  • OsCAldOMT1 is a bifunctional O-methyltransferase involved in the biosynthesis of tricin-lignins in rice cell walls.
  • These data establish OsCAldOMT1 as a bifunctional O-methyltransferase predominantly involved in the two parallel metabolic pathways both dedicated to the biosynthesis of tricin-lignins in rice cell walls
  • Transgenic assays suggested that OsCOMT significantly delays leaf senescence at the grain filling stage by inhibiting degradation of chlorophyll and chloroplast, which, in turn, improves photosynthesis efficiency
  • In addition, the number and size of vascular bundles in the culms and leaves were significantly increased in the OsCOMT-overexpressing plants, while decreased in the knockout plants, suggesting that OsCOMT plays a positive role in vascular development of rice
  • More importantly, we found that OsCOMT is a positive regulator of grain yield, and overexpression of OsCOMT increase grain yield per plant even in a high-yield variety background, suggesting that OsCOMT can be used as an important target for enhancing rice yield
  • In vitro and in vivo evidence revealed that OsCOMT is involved in melatonin biosynthesis
• Connection

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