Chromatin-mediated feed-forward auxin biosynthesis in floral meristem determinacy

• Yamaguchi, Nobutoshi

• Huang, Jiangbo

• Tatsumi, Yoshitaka

• Abe, Masato

• Sugano, Shigeo S.

• Kojima, Mikiko

• Takebayashi, Yumiko

• Kiba, Takatoshi

• Yokoyama, Ryusuke

• Nishitani, Kazuhiko

• Sakakibara, Hitoshi

• Ito, Toshiro

Bibliographic Information

Other Title

• Chromatin-mediated feed-forward regulation of YUCCA4 expression by AGAMOUS and CRABS CLAW directs gynoecium formation

Abstract

In flowering plants, the switch from floral stem cell maintenance to gynoecium (female structure) formation is a critical developmental transition for reproductive success. In Arabidopsis thaliana, AGAMOUS (AG) terminates floral stem cell activities to trigger this transition. Although CRABS CLAW (CRC) is a direct target of AG, previous research has not identified any common targets. Here, we identify an auxin synthesis gene, YUCCA4 (YUC4) as a common direct target. Ectopic YUC4 expression partially rescues the indeterminate phenotype and cell wall defects that are caused by the crc mutation. The feed-forward YUC4 activation by AG and CRC directs a precise change in chromatin state for the shift from floral stem cell maintenance to gynoecium formation. We also showed that two auxin-related direct CRC targets, YUC4 and TORNADO2, cooperatively contribute to the termination of floral stem cell maintenance. This finding provides new insight into the CRC-mediated auxin homeostasis regulation for proper gynoecium formation.

Journal

• Nature Communications

  Nature Communications 9 (1), 5290-, 2018-12-11

  Springer Nature

Keywords

• General Physics and Astronomy
• General Biochemistry, Genetics and Molecular Biology
• General Chemistry
• Multidisciplinary

Details

• CRID: 1050014359399345792
• NII Article ID: 120006549567
• DOI: 10.1038/s41467-018-07763-0
• ISSN: 20411723
• HANDLE: 10061/13098
• Web Site: https://naist.repo.nii.ac.jp/records/9217
• Web Site: https://www.nature.com/articles/s41467-018-07763-0.pdf
• Web Site: https://www.nature.com/articles/s41467-018-07763-0
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN