hypophysis

The hypophysis is a crucial part of a plant embryo's development, specifically in flowering plants. It's a cell or group of cells that forms from the zygote's initial division. The hypophysis is destined to develop into the plant's primary root (radicle) and the root cap, which protects the growing root tip.1

During early embryogenesis, after the zygote divides, the hypophysis plays a role in establishing the embryo's polarity and the foundation for the root system. Its development is part of a complex process that ultimately leads to the formation of a complete seedling with distinct organs like roots, stems, and leaves.123