NODULE ROOT and COCHLEATA maintain nodule development and are legume orthologs of arabidopsis BLADE-ON-PETIOLE genesw oa

Jean Malo Couzigou, Vladimir Zhukov, Samuel Mondy, Ghada Abu El Heba, Viviane Cosson, T. N. Noel Ellis, Mike Ambrose, Jiangqi Wen, Million Tadege, Igor Tikhonovich, Kirankumar S. Mysore, Joanna Putterill, Julie Hofer, Alexei Y. Borisov, Pascal Ratet

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

During their symbiotic interaction with rhizobia, legume plants develop symbiosis-specific organs on their roots, called nodules, that house nitrogen-fixing bacteria. The molecular mechanisms governing the identity and maintenance of these organs are unknown. Using Medicago truncatula nodule root (noot) mutants and pea (Pisum sativum) cochleata (coch) mutants, which are characterized by the abnormal development of roots from the nodule, we identified the NOOT and COCH genes as being necessary for the robust maintenance of nodule identity throughout the nodule developmental program. NOOT and COCH are Arabidopsis thaliana BLADE-ON-PETIOLE orthologs, and we have shown that their functions in leaf and flower development are conserved in M. truncatula and pea. The identification of these two genes defines a clade in the BTB/POZ-ankyrin domain proteins that shares conserved functions in eudicot organ development and suggests that NOOT and COCH were recruited to repress root identity in the legume symbiotic organ.

Original languageEnglish
Pages (from-to)4498-4510
Number of pages13
JournalPlant Cell
Volume24
Issue number11
DOIs
StatePublished - Nov 2012

Scopus subject areas

  • Plant Science
  • Cell Biology

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