Relating to the tendency of plant growth to move or orient in response to light passing through the plant or coming from specific light conditions.
From Greek dia- (through) + photo- (light) + tropism (turning toward), describing how plants adjust their growth orientation based on light exposure patterns.
Diaphototropic responses help plants optimize their leaf position to catch the most sunlight—if you've ever noticed a houseplant gradually turning to face a window, you're watching diaphototropism in action as the plant's growth literally bends toward the light.
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