Endosomal interactions during root hair growth

Frontiers in Plant Science

Olga eSamajova¹  Miroslav eOvecka¹  Jozef eSamaj¹  Amparo eRosero¹  George eKomis¹  Daniel evon Wangenheim²  Boris eVoigt² 

[1] Centre of the Region Hana for Biotechnological and Agricultural Research;Institute of Cellular and Molecular Botany;

关键词: Endosomes;    development;    Interaction;    Arabidopsis thaliana;    trafficking;    root hair;   

DOI  :  10.3389/fpls.2015.01262

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown