A distinct giant coat protein complex II vesicle population in Arabidopsis thaliana

Baiying Li, Yonglun Zeng, Wenhan Cao, Wenxin Zhang, Lixin Cheng, Haidi Yin, Qian Wu, Xiangfeng Wang, Yan Huang, Wilson Chun Yu Lau, Zhong Ping Yao, Yusong Guo*, Liwen Jiang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

18 Citations (Scopus)


Plants live as sessile organisms with large-scale gene duplication events and subsequent paralogue divergence during evolution. Notably, plant paralogues are expressed tissue-specifically and fine-tuned by phytohormones during various developmental processes. The coat protein complex II (COPII) is a highly conserved vesiculation machinery mediating protein transport from the endoplasmic reticulum to the Golgi apparatus in eukaryotes. Intriguingly, Arabidopsis COPII paralogues greatly outnumber those in yeast and mammals. However, the functional diversity and underlying mechanism of distinct COPII paralogues in regulating protein endoplasmic reticulum export and coping with various adverse environmental stresses are poorly understood. Here we characterize a novel population of COPII vesicles produced in response to abscisic acid, a key phytohormone regulating abiotic stress responses in plants. These hormone-induced giant COPII vesicles are regulated by an Arabidopsis-specific COPII paralogue and carry stress-related channels/transporters for alleviating stresses. This study thus provides a new mechanism underlying abscisic acid-induced stress responses via the giant COPII vesicles and answers a long-standing question on the evolutionary significance of gene duplications in Arabidopsis.

Original languageEnglish
Pages (from-to)1335-1346
Number of pages12
JournalNature Plants
Issue number10
Publication statusPublished - Oct 2021

Scopus Subject Areas

  • Plant Science


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