Which organ in the plant body helps in the osmo regulation?

In plants, the organ primarily responsible for osmoregulation is the root. Roots absorb water and minerals from the soil, helping to maintain the plant's internal water balance. Additionally, specialized structures such as guard cells, which surround stomata in leaves, play a crucial role in regulating water loss and gas exchange, further aiding in osmoregulation. Through these mechanisms, plants can adapt to varying water availability in their environment.