Plants don't have nervous systems, but they communicate via chemical signals. Plant hormones, or , act as the "directors" of growth.
acts as a stress signal, closing stomata during droughts to prevent water loss. Adaptation and Stress Response PLANT PHYSIOLOGY and BIOCHEMISTRY
Physiologically, plants are master hydraulic engineers. Through the , plants pull water from the soil to their highest leaves, sometimes hundreds of feet in the air, without a mechanical pump. Biochemically, this is supported by specialized proteins called aquaporins that regulate water flow through membranes, and active transport systems that use ATP to move essential minerals like nitrogen and potassium against concentration gradients. Hormonal Orchestration Plants don't have nervous systems, but they communicate