Individual Plant Light-Heat-Electricity-Water Four-Field Coupled Equation System

This paper proposes an individual-plant Light-Heat-Electricity-Water four-field coupled equation system. The core logic chain is: light changes plant temperature; temperature rise decreases tissue resistance and increases voltage, forming a "biological thermal power plant"; the biological thermal power plant determines the strength of plant growth; gene-determined electrical conductivity and thermal conductivity determine the speed of growth. Thermal energy (from diverse sources including but not limited to light) is the fundamental growth driver. Seed germination underground without light and nighttime growth without light demonstrate heat-driven rather than light-driven growth. The four-field coupling applies exclusively to individual plants. This work marks the transition from Biological Botany to Physical Botany - turning the "black box" of traditional biology into a "white box" that is calculable and verifiable.