Abstract
Plant growth and development is greatly dependent on, and influenced by, light. Therefore, plants have evolved an elaborate machinery to monitor changes in light quality and quantity. The phytochrome family of photoreceptors is responsible for sensing red (R) and far-red (FR) light wavelengths. This is achieved through the ability of phytochrome proteins to switch between the R-absorbing biologically inactive Pr form and the FR-absorbing biologically active Pfr form. In a recent paper, Martinez-Garcia et al.1 have made an important breakthrough in understanding the mechanism by which the phytochrome-perceived signal is transduced to the nucleus to modulate gene expression.
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