---
gene_symbols:
  - MtCCD1
gene_symbol_long: carotenoid cleavage dioxygenase 1
gene_model_pub_name: CAR57918.1
gene_model_full_id: medtr.A17_HM341.gnm4.ann2.Medtr6g034835
confidence: 5
curators:
  - Steven Cannon
phenotype_synopsis: RNA interference (RNAi) was used to repress a M. truncatula CCD1 gene in hairy roots colonized by the arbuscular mycorrhizal (AM) fungus Glomus intraradices.  The normal AM-mediated accumulation of apocarotenoids (C13 cyclohexenone and C14 mycorradicin derivatives) was reduced in repressed plants; mycorradicin derivatives were reduced to 3% to 6% of the controls and the cyclohexenone derivatives were reduced to 30% to 47%.  The RNAi roots turned a yellow-orange color because of C27 apocarotenoid accumulation (the probable substrate of the CCD1 enzyme).  More degenerating arbuscules was observed in RNAi roots.
traits:
  - entity_name: carotene content
    entity: TO:0000289
  - entity_name: root
    entity: PO:0009005
references:
  - citation: Floss, Schliemann et al., 2008
    doi: 10.1104/pp.108.125062
    pmid: 18790999
  - citation: Oellrich, Walls et al., 2015
    doi: 10.1186/s13007-015-0053-y
    pmid: 25774204