Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination
Das S, De Roij M, Bellows S, Alvarez MD, Mutte S, Kohlen W, Farcot E, Weijers D, Borst JW. 2024. Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination. Plant Communications., 101039.
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| Epub ahead of print
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Author
Das, ShubhajitISTA;
De Roij, Martijn;
Bellows, Simon;
Alvarez, Melissa Dipp;
Mutte, Sumanth;
Kohlen, Wouter;
Farcot, Etienne;
Weijers, Dolf;
Borst, Jan Willem
Department
Abstract
The auxin signaling molecule controls a variety of growth and developmental processes in land plants. Auxin regulates gene expression through a nuclear auxin signaling pathway (NAP) consisting of the ubiquitin ligase auxin receptor TIR1/AFB, its Aux/IAA degradation substrate, and DNA-binding ARF transcription factors. Although extensive qualitative understanding of the pathway and its interactions has been obtained, mostly by studying the flowering plant Arabidopsis thaliana, it remains unknown how these translate to quantitative system behavior in vivo, a problem that is confounded by the large NAP gene families in most species. Here, we used the minimal NAP of the liverwort Marchantia polymorpha to quantitatively map NAP protein accumulation and dynamics in vivo through the use of knockin fluorescent fusion proteins. Beyond revealing the dynamic native accumulation profile of the entire NAP protein network, we discovered that the two central ARFs, MpARF1 and MpARF2, are proteasomally degraded. This auxin-independent degradation tunes ARF protein stoichiometry to favor gene activation, thereby reprogramming auxin response during the developmental progression. Thus, quantitative analysis of the entire NAP has enabled us to identify ARF degradation and the stoichiometries of activator and repressor ARFs as a potential mechanism for controlling gemma germination.
Publishing Year
Date Published
2024-07-09
Journal Title
Plant Communications
Acknowledgement
We are grateful to Iris Nieuwland and Neri van Laar for experimental support. No conflict of interest declared.
This work was supported by the Netherlands Organisation for Scientific Research, the Netherlands (grants ALWOP.402 and OCENW.M20.031 to J.W.B.) and the Human Frontiers Research Program (grant RGP0015/2022 to D.W.).
Article Number
101039
eISSN
IST-REx-ID
Cite this
Das S, De Roij M, Bellows S, et al. Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination. Plant Communications. 2024. doi:10.1016/j.xplc.2024.101039
Das, S., De Roij, M., Bellows, S., Alvarez, M. D., Mutte, S., Kohlen, W., … Borst, J. W. (2024). Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination. Plant Communications. Elsevier. https://doi.org/10.1016/j.xplc.2024.101039
Das, Shubhajit, Martijn De Roij, Simon Bellows, Melissa Dipp Alvarez, Sumanth Mutte, Wouter Kohlen, Etienne Farcot, Dolf Weijers, and Jan Willem Borst. “Quantitative Imaging Reveals the Role of MpARF Proteasomal Degradation during Gemma Germination.” Plant Communications. Elsevier, 2024. https://doi.org/10.1016/j.xplc.2024.101039.
S. Das et al., “Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination,” Plant Communications. Elsevier, 2024.
Das S, De Roij M, Bellows S, Alvarez MD, Mutte S, Kohlen W, Farcot E, Weijers D, Borst JW. 2024. Quantitative imaging reveals the role of MpARF proteasomal degradation during gemma germination. Plant Communications., 101039.
Das, Shubhajit, et al. “Quantitative Imaging Reveals the Role of MpARF Proteasomal Degradation during Gemma Germination.” Plant Communications, 101039, Elsevier, 2024, doi:10.1016/j.xplc.2024.101039.
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