Coordination In Plants

Thigmotropism is the growth response of plants to touch. Climbing plants like peas and vines use thigmotropism to wrap their tendrils around supports, allowing them to grow upwards and access more sunlight for photosynthesis.

During drought, the plant hormone abscisic acid (ABA) causes stomata to close, reducing water loss through transpiration. This helps the plant conserve water and survive during dry conditions.

Gibberellins are responsible for promoting stem elongation, seed germination, and flowering. They help break seed dormancy and enable plants to grow taller, which is beneficial for accessing light.