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🌱 Plant Phototropism and Gravitropism

An interactive 3D seedling where you reposition a light source and tilt the pot to watch auxin-driven differential growth bend the stem toward light and the roots downward.

Biology2DModerate60 FPS

An interactive 3D seedling that steers its own growth: reposition the light source and tilt the pot to watch auxin-driven differential elongation bend the stem toward light and the root back down toward gravity.

🔬 What It Demonstrates

The shaded flank of the stem elongates faster than the lit flank (phototropism), while the lower flank of the root elongates slower than the upper flank (gravitropism) — both driven by lateral auxin redistribution, traced here by the glowing amber strand.

🎮 How to Use

Drag the light azimuth and elevation sliders to move the light around the plant, tilt the pot to test gravitropic correction, and adjust auxin sensitivity to see stronger or weaker bending. Toggle the auxin flow strand on or off.

💡 Did You Know?

Darwin's 1880 coleoptile-tip experiments first showed that light is sensed at the shoot tip even though the bending happens further down the stem — exactly where auxin later turned out to accumulate.

⚙ Under the hood

Interactive 3D seedling where users reposition a light source and rotate the pot orientation to watch auxin-driven differential growth bend the stem toward light and the roots downward.

phototropismgravitropismauxinplant-growthplant-biologyhormones

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install