Sensing Without a Brain: Functional Parallels Between Plants and Animals Senses

Plants possess a remarkable ability to sense and respond to their environment, despite lacking nervous systems or sensory organs found in animals. This study investigates how plants demonstrate analogues to the five classical senses - sight, smell, hearing, touch and taste - through biochemical pathways and molecular receptors. Mangrove plants such as Avicennia germinans exhibit adaptations resembling both respiratory and taste senses, using specialized root structures to detect salinity and filter oxygen. Carnivorous species like Nepenthes, Utricularia and Sarracenia display a form of taste sense, identifying and digesting prey through chemical detection and enzymatic activity. Additional examples include touch-sensitive Mimosa pudica, sound - responsive Arabidopsis and visually deceptive orchids that mimic insects or birds. Genetic parallels between plant and animal sensory systems, including photoreceptors, mechanoreceptors and signaling proteins, suggest deep evolutionary roots of environmental perception. This work highlights the complexity of plant intelligence and challenges the notion that sensory perception is exclusive to the animal kingdom.