Chemotropism: The chemical substances in a plant are responsible for bringing a curvature movement in plant organs. When plants start to grow in response to certain chemicals, then it is called chemotropism. A few instances of chemotropic movements are the transformation of the flower into fruit, the tentacles movement in Drosera, etc.Thigmotropism: The growth or development of movements made through plants in response to a solid object contact is called thigmotropism. These types of movements are common in tendrils and twiners. This movement is known as haptotropism.