JAZ proteins modulate seed germination through interaction with ABI5 in bread wheat and Arabidopsis

The New Phytologist
Lan JuJiaqiang Sun

Abstract

Appropriate regulation of crop seed germination is of significance for agriculture production. In this study, we show that TaJAZ1, most closely related to Arabidopsis JAZ3, negatively modulates abscisic acid (ABA)-inhibited seed germination and ABA-responsive gene expression in bread wheat. Biochemical interaction assays demonstrate that the C-terminal part containing the Jas domain of TaJAZ1 physically interacts with TaABI5. Similarly, Arabidopsis jasmonate-ZIM domain (JAZ) proteins also negatively modulate ABA responses. Further we find that a subset of JAZ proteins could interact with ABI5 using the luciferase complementation imaging assays. Choosing JAZ3 as a representative, we demonstrate that JAZ3 interacts with ABI5 in vivo and represses the transcriptional activation activity of ABI5. ABA application could abolish the enrichment of JAZ proteins in the ABA-responsive gene promoter. Furthermore, we find that ABA application could induce the expression of jasmonate (JA) biosynthetic genes and then increase the JA concentrations partially dependent on the function of ABI5, consequently leading to the degradation of JAZ proteins. This study sheds new light on the crosstalk between JA and ABA in modulating seed germination in...Continue Reading

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Citations

Feb 12, 2020·International Journal of Molecular Sciences·Tingting ZhuAnd Maozhi Ren
Mar 1, 2020·Ecological Applications : a Publication of the Ecological Society of America·Zihe ZhangWei Zhang
Jul 31, 2020·Journal of Integrative Plant Biology·Liwen YangRongcheng Lin
Apr 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Nihal Gören-SağlamVicky Buchanan-Wollaston
Apr 5, 2020·International Journal of Molecular Sciences·Jiazhi ShenWanping Fang
Jan 21, 2021·Journal of Experimental Botany·Li TaiKun-Ming Chen
Apr 4, 2021·International Journal of Molecular Sciences·Hai Liu, Michael P Timko
May 12, 2021·Plant Cell Reports·Ya-Jing LiuChun-Xiang You
Jun 1, 2021·Trends in Plant Science·Vishal Varshney, Manoj Majee
Sep 8, 2021·Plant Molecular Biology·Prakash Kumar BhagatAlok Krishna Sinha
Sep 26, 2021·The Plant Journal : for Cell and Molecular Biology·Thomas Depuydt, Klaas Vandepoele
Nov 28, 2021·The Plant Journal : for Cell and Molecular Biology·Shahnewaz BegumBotao Song

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