von Wangenheim, DanielIST Austria ; Rosero, Amparo; Komis, George; Šamajová, Olga; Ovečka, Miroslav; Voigt, Boris; Šamaj, Jozef
The dynamic localization of endosomal compartments labeled with targeted fluorescent protein tags is routinely followed by time lapse fluorescence microscopy approaches and single particle tracking algorithms. In this way trajectories of individual endosomes can be mapped and linked to physiological processes as cell growth. However, other aspects of dynamic behavior including endosomal interactions are difficult to follow in this manner. Therefore, we characterized the localization and dynamic properties of early and late endosomes throughout the entire course of root hair formation by means of spinning disc time lapse imaging and post-acquisition automated multitracking and quantitative analysis. Our results show differential motile behavior of early and late endosomes and interactions of late endosomes that may be specified to particular root hair domains. Detailed data analysis revealed a particular transient interaction between late endosomes—termed herein as dancing-endosomes—which is not concluding to vesicular fusion. Endosomes preferentially located in the root hair tip interacted as dancing-endosomes and traveled short distances during this interaction. Finally, sizes of early and late endosomes were addressed by means of super-resolution structured illumination microscopy (SIM) to corroborate measurements on the spinning disc. This is a first study providing quantitative microscopic data on dynamic spatio-temporal interactions of endosomes during root hair tip growth.
Frontiers in Plant Science
This work was supported by National Program for Sustainability I (grant no. LO1204) provided by the Czech Ministry of Education and by Institutional Fund of Palacký University Olomouc (GK and OŠ). We thank Sabine Fischer for help with the statistics.
von Wangenheim D, Rosero A, Komis G, et al. Endosomal interactions during root hair growth. Frontiers in Plant Science. 2016;6(JAN2016). doi:10.3389/fpls.2015.01262
von Wangenheim, D., Rosero, A., Komis, G., Šamajová, O., Ovečka, M., Voigt, B., & Šamaj, J. (2016). Endosomal interactions during root hair growth. Frontiers in Plant Science. Frontiers Research Foundation. https://doi.org/10.3389/fpls.2015.01262
Wangenheim, Daniel von, Amparo Rosero, George Komis, Olga Šamajová, Miroslav Ovečka, Boris Voigt, and Jozef Šamaj. “Endosomal Interactions during Root Hair Growth.” Frontiers in Plant Science. Frontiers Research Foundation, 2016. https://doi.org/10.3389/fpls.2015.01262.
D. von Wangenheim et al., “Endosomal interactions during root hair growth,” Frontiers in Plant Science, vol. 6, no. JAN2016. Frontiers Research Foundation, 2016.
von Wangenheim D, Rosero A, Komis G, Šamajová O, Ovečka M, Voigt B, Šamaj J. 2016. Endosomal interactions during root hair growth. Frontiers in Plant Science. 6(JAN2016), 1262.
von Wangenheim, Daniel, et al. “Endosomal Interactions during Root Hair Growth.” Frontiers in Plant Science, vol. 6, no. JAN2016, 1262, Frontiers Research Foundation, 2016, doi:10.3389/fpls.2015.01262.
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