OsGH3.1,OsGH3-1,LC1

2015-01-20 | Categories genes  | Tags defense response  iaa  lamina  auxin  homeostasis  cell elongation  BR  defense  leaf 

• Information
  • Symbol: OsGH3.1,OsGH3-1,LC1
  • MSU: LOC_Os01g57610
  • RAPdb: Os01g0785400
• Publication
  • The auxin-responsive GH3 gene family in rice Oryza sativa, 2006, Funct Integr Genomics.
  • Studies on the rice LEAF INCLINATION1 LC1, an IAA-amido synthetase, reveal the effects of auxin in leaf inclination control, 2013, Mol Plant.
  • Constitutive expression of OsGH3.1 reduces auxin content and enhances defense response and resistance to a fungal pathogen in rice, 2009, Mol Plant Microbe Interact.
• Genbank accession number
  • AK063368
• Key message
  • Constitutive expression of OsGH3.1 reduces auxin content and enhances defense response and resistance to a fungal pathogen in rice
  • LC1 is transcribed in various tissues and encodes OsGH3-1, an indole-3-acetic acid (IAA) amido synthetase, whose homolog of Arabidopsis functions in maintaining the auxin homeostasis by conjugating excess IAA to various amino acids
  • Phenotypic analysis confirmed the exaggerated leaf angles of lc1-D due to the stimulated cell elongation at the lamina joint
  • The transcript abundance of nearly all OsGH3 genes is enhanced on auxin treatment, with the effect more pronounced on OsGH3-1, -2, and -4
  • Indeed, recombinant LC1 can catalyze the conjugation of IAA to Ala, Asp, and Asn in vitro, which is consistent with the decreased free IAA amount in lc1-D mutant
  • lc1-D is insensitive to IAA and hypersensitive to exogenous BR, in agreement with the microarray analysis that reveals the altered transcriptions of genes involved in auxin signaling and BR biosynthesis
  • Studies on the rice LEAF INCLINATION1 (LC1), an IAA-amido synthetase, reveal the effects of auxin in leaf inclination control
  • Through genetic screening, a rice gain-of-function mutant leaf inclination1, lc1-D, was identified from the Shanghai T-DNA Insertion Population (SHIP)
• Connection

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