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Plant Conditioning and Behavior

Plant Conditioning and Behavior is the study of how plants react to touch, light, or signals over time.

Think of it this way

A potted herb on a kitchen counter leans toward the window over a few days. Turn the pot around, and the stems slowly bend back toward the light. Block the window with a towel, and the herb stops leaning and grows straight up. The plant changed how it grew based on signals around it.

Explaining plant conditioning and behavior by grade level

Some plants move when you touch them. The Mimosa plant folds its leaves right away if you poke them. But plants do not learn the way animals do. If you touch the same leaf many times, the plant still folds every time.

Projects that explore plant conditioning and behavior

Mimosa Pudica and Pavlovian Conditioning

Plants react to signals like light and temperature, but can they learn to link two signals together the way animals do? This experiment tests that question using Mimosa pudica — a plant whose leaves close on cue. For six days, dim the lights while dropping the room temperature from 25 to 16 degrees Celsius, training the leaves to close each time both signals arrive. On the seventh day, drop the temperature alone and leave the lights on. If the plants have formed a learned association, the leaves should still close — revealing whether Pavlovian conditioning extends beyond animals into the plant kingdom.

Medium