Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-07763-0
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Funding
- Japan Science and Technology Agency 'recursory Research for Embryonic Science and Technology' [JPMJPR15QA]
- JSPS KAKENHI [16H01468, 18H04782, 18H02465, 18K14678, 18H04793, 24114001, 16K07389, 17H03691, 17H06473, 15H01234, 15H01356, 17H05843, 18H04839, 15H02405]
- NAIST foundation
- Takeda Science foundation
- Sumitomo Foundation
- Japan Science and Technology Agency 'Precursory Research for Embryonic Science and Technology' [JPMJPR15Q6]
- Mitsubishi Foundation
- Temasek Life Sciences Laboratory (TLL)
- National Research Foundation Singapore under its Competitive Research Programme (CRP Award) [NRFCRP001-108]
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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.
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