Overexpression of a TaATL1 encoding RING-type E3 ligase negatively regulates cell division and flowering time in Arabidopsis thaliana

Jae Ho Kim, Moon Seok Kim, Yong Weon Seo

Research output: Contribution to journalArticlepeer-review


The transition of food crops from the vegetative to reproductive stages is an important process that affects the final yield. Despite extensive characterization of E3 ligases in model plants, their roles in wheat development remain unknown. In this study, we elucidated the molecular function of wheat TaATL1 (Arabidopsis thaliana Toxicos EN Levadura), which acts as a negative regulator of flowering time and cell division. TaATL1 amino acid residues contain a RING domain and exist mainly in a beta-turn form. The expression level of TaATL1 was highly reduced during the transition from vegetative to reproductive stages. TaATL1 is localized in the nucleus and exhibits E3 ligase activity. Transgenic Arabidopsis plants, in which the TaATL1 gene is constitutively overexpressed under the control of the cauliflower mosaic virus 35 S promoter, exhibited regulation of cell numbers, thereby influencing both leaf and root growth. Moreover, TaATL1 overexpression plants showed a late-flowering phenotype compared to wild-type (WT) plants. Following transcriptome analysis, it was discovered that 1661 and 901 differentially expressed genes were down- or up- regulated, respectively, in seedling stages between WT and TaATL1 overexpression. TaATL1 transcripts are involved in cell division, flowering, and signaling. Overall, our findings demonstrated that the regulatory mechanism of wheat TaATL1 gene plays a significant role in cell division-mediated flowering in Arabidopsis.

Original languageEnglish
Article number111966
JournalPlant Science
Publication statusPublished - 2024 Mar

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.


  • Arabidopsis
  • Ring E3 ligase
  • TaATL1
  • Ubiquitination
  • Wheat

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science


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