Plants are often seen as passive organisms, rooted in one place and largely unable to react to the world around them.

But a new field of research is challenging these assumptions and showing that plants are as sophisticated as animals in detecting and adjusting to environmental signals.

Plants can perceive light through specialised proteins, detect sound vibrations and respond to touch via mechano-sensitive channels, recognise chemical signals released by neighbouring plants, and even retain memories of past experiences through changes in their DNA.

My own research focuses on how plants detect the passage of time as part of their seasonal cycle, but that it merely one aspect of a major reconsideration of their sensory capacity – and the parallels with animal senses.

Plants can see colours

Anyone who has noticed a flower turning its head to track the sun knows plants can detect light. Like animals, plants sense light signals using specialised receptors, each for a different wavelength (or colour) of light.

Phytochromes detect red and far-red light and cryptochromes and phototropins respond to blue and ultraviolet light. These sensors transform light cues into molecular signals to coordinate a plant’s........

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