Abstract
Abstract Light plays a pivotal role in several physiological processes during plant growth, development and adaptation. Plants sense and respond to fluctuating light conditions using various photoreceptors such as phytochromes, cryptochromes and phototropins. In particular, cryptochromes are able to monitor, capture and transmit the stimuli of UVA/blue light in order to promote photomorphogenesis and regulate many aspects of plant development and growth including seed germination and seedling de‐etiolation, flowering induction, circadian rhythms and stress responses. Cryptochromes influence all these processes by modulating the expression pattern of several genes; such massive regulation is fundamental for optimising all physiological properties of plants throughout their life cycle. Key Concepts Light is essential for plant life. Plants use photoreceptors to sense and monitor quality, direction, intensity and length of light stimulus. Cryptochromes play fundamental roles in plant development. Cryptochromes are highly conserved among plant species. Cryptochromes regulate many light‐dependent physiological processes.
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