During seed germination, the part of the embryo which grows into root is

During seed germination, the radicle is the specific part of the embryo that develops into the root system. It is the first part of the plant to emerge from the seed coat, growing downward into the soil to anchor the seedling and facilitate the absorption of water and nutrients. In many plants, the radicle forms the primary descending taproot [1]. In contrast, the plumule is the embryonic shoot that develops into the leaves and stem [1]. The cotyledons serve as the first leaves or food storage organs, providing initial energy for growth [1]. The epicotyl is the region of the embryonic axis above the cotyledon attachment point that contributes to shoot development [1]. Therefore, the radicle is uniquely responsible for initiating the root system during the transition from embryo to seedling [2].

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 13: Plant Diversity of India > t3.7.4,Root types \ > p. 205
2. [2] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/root-radicle