AI Article Synopsis
- Fertilization in flowering plants begins with the fusion of maternal and paternal cells, resulting in the formation of the embryo and endosperm, surrounded by a seed coat.
- Prior to fertilization, seed coat development is inhibited by epigenetic regulators from the Polycomb Group (PcG) protein family.
- The study suggests that auxin produced after fertilization helps initiate seed coat development by counteracting PcG inhibition, with the MADS-box transcription factor AGL62 playing a key role in auxin transport necessary for successful seed formation.
Article Abstract
In flowering plants, seed development is initiated by the fusion of the maternal egg and central cells with two paternal sperm cells, leading to the formation of embryo and endosperm, respectively. The fertilization products are surrounded by the maternally derived seed coat, whose development prior to fertilization is blocked by epigenetic regulators belonging to the Polycomb Group (PcG) protein family. Here we show that fertilization of the central cell results in the production of auxin and most likely its export to the maternal tissues, which drives seed coat development by removing PcG function. We furthermore show that mutants for the MADS-box transcription factor AGL62 have an impaired transport of auxin from the endosperm to the integuments, which results in seed abortion. We propose that AGL62 regulates auxin transport from the endosperm to the integuments, leading to the removal of the PcG block on seed coat development.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5135394 | PMC |
| http://dx.doi.org/10.7554/eLife.20542 | DOI Listing |
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