Ge, Zengxiang and Bergonci, Tabata and Zhao, Yuling and Zou, Yanjiao and Du, Shuo and Liu, Ming-Che and Luo, Xingju and Ruan, Hao and Garcia-Valencia, Liliana E. and Zhong, Sheng and Hou, Saiying and Huang, Qingpei and Lai, Luhua and Moura, Daniel S. and Gu, Hongya and Dong, Juan and Wu, Hen-Ming and Dresselhaus, Thomas and Xiao, Junyu and Cheung, Alice Y. and Qu, Li-Jia (2017) Arabidopsis pollen tube integrity and sperm release are regulated by RALF-mediated signaling. SCIENCE, 358 (6370). pp. 1596-1599. ISSN 0036-8075, 1095-9203
Full text not available from this repository. (Request a copy)Abstract
In flowering plants, fertilization requires complex cell-to-cell communication events between the pollen tube and the female reproductive tissues, which are controlled by extracellular signaling molecules interacting with receptors at the pollen tube surface. We found that two such receptors in Arabidopsis, BUPS1 and BUPS2, and their peptide ligands, RALF4 and RALF19, are pollen tube-expressed and are required to maintain pollen tube integrity. BUPS1 and BUPS2 interact with receptors ANXUR1 and ANXUR2 via their ectodomains, and both sets of receptors bind RALF4 and RALF19. These receptor-ligand interactions are in competition with the female-derived ligand RALF34, which induces pollen tube bursting at nanomolar concentrations. We propose that RALF34 replaces RALF4 and RALF19 at the interface of pollen tube-female gametophyte contact, thereby deregulating BUPS-ANXUR signaling and in turn leading to pollen tube rupture and sperm release.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RECEPTOR-LIKE KINASES; FERONIA; GROWTH; PROTEIN; FERTILIZATION; REPRODUCTION; PERCEPTION; MECHANISMS; PEPTIDES; LEPRK2; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences 500 Science > 570 Life sciences 500 Science > 580 Botanical 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: | 14 Dec 2018 13:18 |
| Last Modified: | 26 Feb 2019 12:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1674 |
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