BBC:

Plants are able to "remember" and "react" to information contained in light, according to researchers.

Plants, scientists say, transmit information about light intensity and quality from leaf to leaf in a very similar way to our own nervous systems. These "electro-chemical signals" are carried by cells that act as "nerves" of the plants. And the response, which took the form of light-induced chemical reactions in the leaves, continued in the dark. This showed, they said, that the plant "remembered" the information encoded in light.

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