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Embryo sac development: The embryo sac is the female haploid unit of flowering plant reproduction that produces a seed with embryo and endosperm after fertilization by sperm cells in the pollen. Our lab has identified hundreds of genes required for embryo sac development, including key switches for gametic cell identity. Manipulation of these genes can change embryo to endosperm or vice versa, with potentially major applications for agricultural seed production.
Zygotic transition, pluripotency factors, and apomixis: The fusion of a male gamete (sperm cell) with the female gamete (egg cell), generates the zygote, a single cell that is totipotent, i.e., will regenerate an entire plant. Using rice as a model, we have characterized the early stages of the transition from a fertilized egg cell into a zygote by genome-wide transcriptional profiling. This has led to the identification of putative pluripotency factors, which appear to be under epigenetic controls in the gametes that are currently being studied. At least one of these transcription factors can be manipulated to make parthenogenetic embryos, and potentially, the propagation of hybrids through seeds (synthetic apomixis).
Embryo sac development: The embryo sac is the female haploid unit of flowering plant reproduction that produces a seed with embryo and endosperm after fertilization by sperm cells in the pollen. Our lab has identified hundreds of genes required for embryo sac development, including key switches for gametic cell identity. Manipulation of these genes can change embryo to endosperm or vice versa, with potentially major applications for agricultural seed production.
Zygotic transition, pluripotency factors, and apomixis: The fusion of a male gamete (sperm cell) with the female gamete (egg cell), generates the zygote, a single cell that is totipotent, i.e., will regenerate an entire plant. Using rice as a model, we have characterized the early stages of the transition from a fertilized egg cell into a zygote by genome-wide transcriptional profiling. This has led to the identification of putative pluripotency factors, which appear to be under epigenetic controls in the gametes that are currently being studied. At least one of these transcription factors can be manipulated to make parthenogenetic embryos, and potentially, the propagation of hybrids through seeds (synthetic apomixis).
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Plant Reproductionno. 4 (2023): 301-320
bioRxiv (Cold Spring Harbor Laboratory) (2021)
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