Vogler, Frank and Sprunck, Stefanie (2015) F-actin forms mobile and unwinding ring-shaped structures in germinating Arabidopsis pollen expressing Lifeact. PLANT SIGNALING & BEHAVIOR, 10 (10): UNSP e1075. ISSN 1559-2316, 1559-2324
Full text not available from this repository. (Request a copy)Abstract
The flowering plant pollen tube is the fastest elongating plant cell and transports the sperm cells for double fertilization. The highly dynamic formation and reorganization of the actin cytoskeleton is essential for pollen germination and pollen tube growth. To drive pollen-specific expression of fluorescent marker proteins, commonly the strong Lat52 promoter is used. Here we show by quantitative fluorescent analysis that the gametophyte-specific ARO1 promoter from Arabidopsis drives an about 3.5times weaker transgene expression than the Lat52 promoter. In one third of the pollen of F-actin-labeled ARO1p:tagRFP-T-Lifeact transgenic lines we observed mobile ring-shaped actin structures in pollen grains and pollen tubes. Pollen tube growth, transgene transmission and seed production were not affected by tagRFP-T-Lifeact expression. F-actin rings were able to integrate into emerging actin filaments and they may reflect a particular physiological state of the pollen or a readily available storage form provided for rapid actin network remodeling.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROTEINS; GROWTH; REORGANIZATION; ORGANIZATION; CYTOSKELETON; THALIANA; DYNAMICS; MARKER; PLANTS; CELLS; acquosome; actin ring; ARO1; Lat52; Lifeact; pollen tube; stress; tagRFP-T |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 May 2019 12:44 |
| Last Modified: | 16 May 2019 12:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4638 |
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