Wang, Wei and Malka, Raphael and Lindemeier, Maria and Cyprys, Philipp and Tiedemann, Sophie and Sun, Kaiting and Zhang, Xuecheng and Xiong, Hanxian and Sprunck, Stefanie and Sun, Meng-Xiang (2024) EGG CELL 1 contributes to egg-cell-dependent preferential fertilization in Arabidopsis. NATURE PLANTS, 10 (2). pp. 268-282. ISSN 2055-026X, 2055-0278
Full text not available from this repository. (Request a copy)Abstract
During double fertilization in angiosperms, the pollen tube delivers two sperm cells into an embryo sac; one sperm cell fuses with an egg cell, and the other sperm cell fuses with the central cell. It has long been proposed that the preference for fusion with one or another female gamete cell depends on the sperm cells and occurs during gamete recognition. However, up to now, sperm-dependent preferential fertilization has not been demonstrated, and results on preferred fusion with either female gamete have remained conflicting. To investigate this topic, we generated Arabidopsis thaliana mutants that produce single sperm-like cells or whose egg cells are eliminated; we found that although the three different types of sperm-like cell are functionally equivalent in their ability to fertilize the egg and the central cell, each type of sperm-like cell fuses predominantly with the egg cell. This indicates that it is the egg cell that controls its preferential fertilization. We also found that sperm-activating small secreted EGG CELL 1 proteins are involved in the regulation of egg-cell-dependent preferential fertilization, revealing another important role for this protein family during double fertilization.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NAC TRANSCRIPTION FACTORS; ENDOSPERM DEVELOPMENT; POLYSPERMY BARRIERS; GAMETE ATTACHMENT; GENERATIVE CELLS; POLLEN TUBES; SPERM; GENOME; PROLIFERATION; ACTIVATION |
| Subjects: | 500 Science > 570 Life sciences 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Dec 2025 09:18 |
| Last Modified: | 09 Dec 2025 09:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64415 |
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