ECAP coordinates upstream and downstream ABA signaling during seed germination in Arabidopsis 48 27

Authors

  • Muhammad Tanveer Altaf Department of Field Crops, Faculty of Agriculture, Recep Tayyip Erdoğan University, Rize/Pazar, Türkiye Author https://orcid.org/0000-0003-2373-857X

DOI:

https://doi.org/10.66835/psh.2026.e0008

Keywords:

ABA, Seed, Phytohormone, Adaptation, Transcription

Abstract

Abscisic acid (ABA) is a major phytohormone that regulates seed dormancy, germination, and plant adaptation to environmental stresses. Recent studies identified the EAR motif-containing adaptor protein ECAP as a central regulator of ABA signaling in Arabidopsis. ECAP coordinates ABA receptor complex assembly, PP2C inhibition, and ABI5-mediated transcriptional activation, thereby integrating upstream signal perception with downstream transcriptional responses controlling seed germination and stress adaptation.

References

[1] M. Muhammad Aslam, M. Waseem, B. H. Jakada, E. J. Okal, Z. Lei, H. S. A. Saqib, W. Yuan, W. Xu, and Q. Zhang, Mechanisms of abscisic acid-mediated drought stress responses in plants, International journal of molecular sciences, vol. 23, no. 3, p. 1084, 2022. DOI: https://doi.org/10.3390/ijms23031084

[2] X. Li, J. Zhang, C. Xu, L. Wang, and S. Yan, The EAR motif-containing adaptor protein ECAP enhances ABI5-mediated ABA signaling to inhibit seed germination in Arabidopsis, Plant Communications, 2026. DOI: https://doi.org/10.1016/j.xplc.2026.101839

[3] X. Li, C. Li, G. Lv, L. Shi, S. Tan, X. Li, K. Liu, A. Li, L. Zhu, and G. Yang, The EAR motif-containing adaptor protein ECAP enhances the assembly of PYR1-ABI1 complex to promote ABA signaling in Arabidopsis, Molecular Plant, 2026. DOI: https://doi.org/10.1016/j.molp.2026.03.015

[4] C. Li, L. Shi, Y. Wang, W. Li, B. Chen, L. Zhu, and Y. Fu, Arabidopsis ECAP Is a New Adaptor Protein that Connects JAZ Repressors with the TPR2 Co-repressor to Suppress Jasmonate-Responsive Anthocyanin Accumulation, Molecular Plant, vol. 13, no. 2, pp. 246-265, 2020. DOI: https://doi.org/10.1016/j.molp.2019.10.014

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Published

2026-07-16

Data Availability Statement

The data supporting the findings of this study are not publicly available. All relevant information is included within the manuscript.

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Section

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How to Cite

Altaf, M. T. (2026). ECAP coordinates upstream and downstream ABA signaling during seed germination in Arabidopsis. Plant Science Horizons, 1(2), 1-4. https://doi.org/10.66835/psh.2026.e0008

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