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Biology

Plant Temperature Compared to Surroundings

Quick fact

A well-watered leaf in full sun can be several degrees cooler than the surrounding air, thanks to evaporative cooling from transpiration; conversely, a drought-stressed plant can become several degrees warmer than the air.

Why this is interesting

Have you ever touched a leaf on a hot day and felt it surprisingly cool? Or noticed a plant in full sun feeling almost hot? Plants aren't just passive thermometers—they have a special relationship with temperature.

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Plant Temperature Compared to Surroundings

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