SDG2 regulates Arabidopsis inflorescence architecture through SWR1-ERECTA signaling pathway

Liping Liu; Mengnan Chai; Youmei Huang; Jingang Qi; Wenhui Zhu; Xinpeng Xi; Fangqian Chen; Yuan Qin; Hanyang Cai

doi:10.1016/j.isci.2021.103236

SDG2 regulates Arabidopsis inflorescence architecture through SWR1-ERECTA signaling pathway

iScience. 2021 Oct 12;24(11):103236. doi: 10.1016/j.isci.2021.103236. eCollection 2021 Nov 19.

Authors

Liping Liu¹, Mengnan Chai¹, Youmei Huang¹, Jingang Qi¹, Wenhui Zhu¹, Xinpeng Xi¹, Fangqian Chen¹, Yuan Qin^{1

2}, Hanyang Cai¹

Affiliations

¹ College of Life Science, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
² State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Lab of Sugarcane Biology, College of Agriculture, Guangxi University, Nanning 530004, China.

Abstract

Inflorescence architecture is diverse in flowering plants, and two determinants of inflorescence architecture are the inflorescence meristem and pedicel length. Although the ERECTA (ER) signaling pathway, in coordination with the SWR1 chromatin remodeling complex, regulates inflorescence architecture with subsequent effects on pedicel elongation, the mechanism underlying SWR1-ER signaling pathway regulation of inflorescence architecture remains unclear. This study determined that SDG2 genetically interacts with the SWR1-ER signaling pathways in regulating inflorescence architecture. Transcriptome results showed that auxin might potentially influence inflorescence growth mediated by SDG2 and SWR1-ER pathways. SWR1 and ER signaling are required to enrich H2A.Z histone variant and SDG2 regulated SDG2-mediated H3K4me3 histone modification at auxin-related genes and H2A.Z histone variant enrichment. Our study shows how the regulation of inflorescence architecture is mediated by SDG2 and SWR1-ER, which affects auxin hormone signaling pathways.

Keywords: Molecular biology; Plant Biology; Plant morphology; Transcriptomics.