In response to gravity, certain plants show some growth and development, this type of tropism in plants with respect to gravity is called Gravitropism. Generally, in plants, stems respond negatively to gravitropism and roots respond positively to gravitropism. This is also called geotropism. Among different parts of plants, the roots show positive geotropism when directed towards the center of gravity. The stems show negative geotropic as they grow against the center of gravity. Here, gravitational force plays a major role in tropism.