Journal
PLANT CELL REPORTS
Volume 34, Issue 8, Pages 1317-1330Publisher
SPRINGER
DOI: 10.1007/s00299-015-1789-6
Keywords
Nucleus; Root hair; Tip growth; Actin filament; Actin-binding protein; Arabidopsis thaliana
Categories
Funding
- Natural Science Foundation of China [31371352]
- Beijing Higher Education Young Elite Teacher Project [YETP0303]
Ask authors/readers for more resources
PCaP2 plays a key role in maintaining the nucleus at a relatively fixed distance from the apex during root hair growth by modulating actin filaments. During root hair growth, the nucleus localizes at a relatively fixed distance from the apex. In Arabidopsis thaliana, the position of the nucleus is mainly dependent on the configuration of microfilaments (filamentous actin). However, the mechanisms underlying the regulation of actin dynamics and organization for nuclear positioning are largely unknown. In the present study, we demonstrated that plasma membrane-associated Ca2+ binding protein 2 (PCaP2) influences the position of the nucleus during root hair growth. Abnormal expression of PCaP2 in pcap2 and PCaP2 over-expression plants led to the disorganization of actin filaments, rather than microtubules, in the apex and sub-apical regions of root hairs, which resulted in aberrant root hair growth patterns and misplaced nuclei. Analyses using a PCaP2 mutant protein revealed that actin-severing activity is essential for the function of PCaP2 in root hairs. We demonstrated that PCaP2 plays a key role in maintaining nuclear position in growing root hairs by modulating actin filaments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available