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Systematic identification of genes associated with plant growth–defense tradeoffs under JA signaling in Arabidopsis

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Abstract

Main conclusion

Co-expression and regulatory networks yield important insights into the growth–defense tradeoffs mechanism under jasmonic acid (JA) signals in Arabidopsis.

Abstract

Elevated defense is commonly associated with growth inhibition. However, a comprehensive atlas of the genes associated with the plant growth–defense tradeoffs under JA signaling is lacking. To gain an insight into the dynamic architecture of growth–defense tradeoffs, a coexpression network analysis was employed on publicly available high-resolution transcriptomes of Arabidopsis treated with coronatine (COR), a mimic of jasmonoyl-l-isoleucine. The genes involved in JA-mediated growth–defense tradeoffs were systematically revealed. Promoter enrichment analysis revealed the core regulatory module in which the genes underwent rapid activation, sustained upregulation after COR treatment, and mediated the growth–defense tradeoffs. Several transcription factors (TFs), including RAP2.6L, MYB44, WRKY40, and WRKY18, were identified as instantly activated components associated with pathogen and insect resistance. JA might rapidly activate RAV1 and KAN1 to repress brassinosteroid (BR) response genes, upregulate KAN1, the C2H2 TF families ZF2, ZF3, ZAT6, and STZ/ZAT10 to repress the biosynthesis, transport, and signaling of auxin to arrest growth. Independent datasets and preserved analyses validated the reproducibility of the results. Our study provided a comprehensive snapshot of genes that respond to JA signals and provided valuable resources for functional studies on the genetic modification of breeding population that exhibit robust growth and defense simultaneously.

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Abbreviations

BR:

Brassinosteroid

COR:

Coronatine

JA:

Jasmonic acid

TF:

Transcription factor

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Acknowledgements

This paper was dedicated to The 100th Anniversary of Nankai University and The 100th Birthday Anniversary of Professor Ruyu Chen.

Funding

This work was supported in part by the National Key Research & Development Program of China (No. 2017YFD0200900 and No. 2017YFD0200903), the National Natural Science Foundation of China (No. 31872007 and No. 31571991), the Tianjin Natural Science Foundation (No. 18JCZDJC33500), the International Science & Technology Cooperation Program of China (No. 2014DFR41030) and The Fundamental Research Funds for the Central Universities, Nankai University (No 63191743 and No 63191323).

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ZF and NZ conceived the original research plan; NZ analyzed the data, performed statistical analyses, data visualization, and wrote the manuscript; BZ performed RT-qPCR experiments. BZ, DY, XG, QW, BY, SZ, and HW authored or reviewed drafts of the paper. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Zhijin Fan.

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The authors declare that they have no competing interests.

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Zhang, N., Zhao, B., Fan, Z. et al. Systematic identification of genes associated with plant growth–defense tradeoffs under JA signaling in Arabidopsis. Planta 251, 43 (2020). https://doi.org/10.1007/s00425-019-03335-8

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  • DOI: https://doi.org/10.1007/s00425-019-03335-8

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