Global analysis of canola genes targeted by SHORT HYPOCOTYL UNDER BLUE 1 during endosperm and embryo development

Huanan Zhang, Feng Cheng, Yuguo Xiao, Xiaojun Kang, Xiaowu Wang, Rui Kuang, Min Ni

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Seed development in dicots includes early endosperm proliferation followed by growth of the embryo to replace the endosperm. Endosperm proliferation in dicots not only provides nutrient supplies for subsequent embryo development but also enforces a space limitation, influencing final seed size. Overexpression of Arabidopsis SHORT HYPOCOTYL UNDER BLUE1::uidA (SHB1:uidA) in canola produces large seeds. We performed global analysis of the canola genes that were expressed and influenced by SHB1 during early endosperm proliferation at 8 days after pollination (DAP) and late embryo development at 13 DAP. Overexpression of SHB1 altered the expression of 973 genes at 8 DAP and 1035 genes at 13 DAP. We also surveyed the global SHB1 association sites, and merging of these sites with the RNA sequencing data identified a set of canola genes targeted by SHB1. The 8-DAP list includes positive and negative genes that influence endosperm proliferation and are homologous to Arabidopsis MINI3, IKU2, SHB1, AGL62, FIE and AP2. We revealed a major role for SHB1 in canola endosperm development based on the dynamics of SHB1-altered gene expression, the magnitude of SHB1 chromatin immunoprecipitation enrichment and the over-representation of eight regulatory genes for endosperm development. Our studies focus on an important agronomic trait in a major crop for global agriculture. The datasets on stage-specific and SHB1-induced gene expression and genes targeted by SHB1 also provide a useful resource in the field of endosperm development and seed size engineering. Our practices in an allotetraploid species will impact similar studies in other crop species.

Original languageEnglish (US)
Pages (from-to)158-171
Number of pages14
JournalPlant Journal
Issue number1
StatePublished - Jul 2017

Bibliographical note

Publisher Copyright:
© 2017 The Authors The Plant Journal © 2017 John Wiley & Sons Ltd


  • Brassica napus
  • ChIP-seq
  • RNA-seq
  • SHB1
  • canola
  • embryo development
  • endosperm proliferation


Dive into the research topics of 'Global analysis of canola genes targeted by SHORT HYPOCOTYL UNDER BLUE 1 during endosperm and embryo development'. Together they form a unique fingerprint.

Cite this