Leaf Anatomy and Function

Abstract

Plant leaves provide the following main functions: (1) light interception and utilization of light energy for photosynthesis. This includes efficient light absorption under low and moderate light, while reducing excess light absorption under high light. (2) Incorporating CO2 as the substrate of photosynthesis, while limiting the amount of water lost. (3) Maintaining a stable internal environment for physiological processes by modulating leaf temperature. (4) Maintaining structural integrity that allows leaves to photosynthesize under various mechanical stresses such as gravity, wind, rainfall and herbivory. (5) Transporting water, photosynthates, and nutrients to realize efficient functioning of the plant and the leaf.