Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana

Wang R, Himschoot E, Chen J, Boudsocq M, Geelen D, Friml J, Beeckman T, Vanneste S. 2022. Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana. Frontiers in Plant Science. 13, 862398.

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Journal Article | Published | English

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Author
Wang, Ren; Himschoot, Ellie; Chen, Jian; Boudsocq, Marie; Geelen, Danny; Friml, JiríISTA ; Beeckman, Tom; Vanneste, Steffen
Department
Abstract
Calcium-dependent protein kinases (CPK) are key components of a wide array of signaling pathways, translating stress and nutrient signaling into the modulation of cellular processes such as ion transport and transcription. However, not much is known about CPKs in endomembrane trafficking. Here, we screened for CPKs that impact on root growth and gravitropism, by overexpressing constitutively active forms of CPKs under the control of an inducible promoter in Arabidopsis thaliana. We found that inducible overexpression of an constitutive active CPK30 (CA-CPK30) resulted in a loss of root gravitropism and ectopic auxin accumulation in the root tip. Immunolocalization revealed that CA-CPK30 roots have reduced PIN protein levels, PIN1 polarity defects and impaired Brefeldin A (BFA)-sensitive trafficking. Moreover, FM4-64 uptake was reduced, indicative of a defect in endocytosis. The effects on BFA-sensitive trafficking were not specific to PINs, as BFA could not induce aggregation of ARF1- and CHC-labeled endosomes in CA-CPK30. Interestingly, the interference with BFA-body formation, could be reverted by increasing the extracellular pH, indicating a pH-dependence of this CA-CPK30 effect. Altogether, our data reveal an important role for CPK30 in root growth regulation and endomembrane trafficking in Arabidopsis thaliana.
Publishing Year
Date Published
2022-06-16
Journal Title
Frontiers in Plant Science
Acknowledgement
RW and JC predoctoral fellows that were supported by the Chinese Science Counsil. The IPS2 benefits from the support of the LabEx Saclay Plant Sciences-SPS (ANR-10-LABX-0040-SPS). We thank Jen Sheen for establishing and generously sharing the CKP family clone sets, and for providing useful feedback on the manuscript.
Volume
13
Article Number
862398
eISSN
IST-REx-ID

Cite this

Wang R, Himschoot E, Chen J, et al. Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana. Frontiers in Plant Science. 2022;13. doi:10.3389/fpls.2022.862398
Wang, R., Himschoot, E., Chen, J., Boudsocq, M., Geelen, D., Friml, J., … Vanneste, S. (2022). Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana. Frontiers in Plant Science. Frontiers. https://doi.org/10.3389/fpls.2022.862398
Wang, Ren, Ellie Himschoot, Jian Chen, Marie Boudsocq, Danny Geelen, Jiří Friml, Tom Beeckman, and Steffen Vanneste. “Constitutive Active CPK30 Interferes with Root Growth and Endomembrane Trafficking in Arabidopsis Thaliana.” Frontiers in Plant Science. Frontiers, 2022. https://doi.org/10.3389/fpls.2022.862398.
R. Wang et al., “Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana,” Frontiers in Plant Science, vol. 13. Frontiers, 2022.
Wang R, Himschoot E, Chen J, Boudsocq M, Geelen D, Friml J, Beeckman T, Vanneste S. 2022. Constitutive active CPK30 interferes with root growth and endomembrane trafficking in Arabidopsis thaliana. Frontiers in Plant Science. 13, 862398.
Wang, Ren, et al. “Constitutive Active CPK30 Interferes with Root Growth and Endomembrane Trafficking in Arabidopsis Thaliana.” Frontiers in Plant Science, vol. 13, 862398, Frontiers, 2022, doi:10.3389/fpls.2022.862398.
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