Genetic interaction between GROWTHREGULATING FACTOR and CUP-SHAPED COTYLEDON in organ separation

Byung Ha Lee, Jae Og Jeon, Myeong Min Lee, Jeong Hoe Kim

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The Arabidopsis thaliana GROWTH-REGULATING FACTOR (GRF) gene family comprises 9 members and encodes a class of transcription factors. We previously demonstrated that GRF genes played an essential role in formation of the boundary region between cotyledons, since their loss-of-function mutants developed fused cotyledons. Our present study shows that the grf mutants display fused floral organs as well. Such fusion phenotypes of embryonic and postembryonic floral organs are highly reminiscent of the cup-shaped cotyledon (cuc) mutants. In order to test a genetic interaction between GRFs and CUCs, we constructed cuc1 grf1/2/3, cuc2 grf1/2/3, and cuc3 grf1/2/3 quadruple mutants, and found that the mutants showed dramatic increases in cotyledon fusion as well as floral organ fusion. The results suggest that the signaling pathway of GRFs may be genetically associated with that of CUCs in the organ separation process.

Original languageEnglish
Article numbere988071
JournalPlant Signaling and Behavior
Issue number2
Publication statusPublished - 2015

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation Grants funded by the Korean Government (NRF-2006– 331-C00264 and NRF-2009–0076517).

Publisher Copyright:
© 2015 Taylor & Francis Group, LLC.

All Science Journal Classification (ASJC) codes

  • Plant Science


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