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Nature 455, 1134-1137 (23 October 2008) | doi:10.1038/nature07289;
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Control of plant germline proliferation by SCFFBL17 degradation of cell cycle inhibitors
Flowering plants possess a unique reproductive strategy, involving double fertilization by twin sperm cells. Unlike animal germ lines, the male germ cell lineage in plants only forms after meiosis and involves asymmetric division of haploid microspores, to produce a large, non-germline vegetative cell and a germ cell that undergoes one further division to produce the twin sperm cells.
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