Heat, not light, may be what actually drives plant growth
Plant Biophysics
Every seed you bury in dark soil or every houseplant that keeps growing after sunset is quietly making this theory's case: growth doesn't stop just because the lights go out.
This paper suggests plants grow because they warm up, not simply because they're lit. As tissue heats, its electrical resistance drops and a tiny internal voltage rises, acting like the plant's own power plant that fuels growth, with a gene-set thermal and electrical 'wiring' controlling how fast that growth happens. The authors point to seeds sprouting underground in total darkness and plants continuing to grow at night as evidence that heat, not light itself, is the real engine.
Key Findings
Proposes a four-field coupled model linking light, heat, electricity, and water within an individual plant's growth process
Argues rising tissue temperature lowers electrical resistance and raises voltage, framing the plant as a 'biological thermal power plant' that determines growth strength
Cites underground seed germination and nighttime growth (both without light) as evidence that heat, not light, is the primary growth driver
chevron_right Technical Summary
A new theoretical model proposes that plants grow primarily because of heat rather than light: rising tissue temperature lowers electrical resistance and boosts an internal voltage that drives growth, with light acting only as one possible heat source among several.
Abstract Preview
Original paper
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 ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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