News of the WeekPlant Science

How Seedlings See the Light

See allHide authors and affiliations

Science  17 Aug 2001:
Vol. 293, Issue 5533, pp. 1237-1238
DOI: 10.1126/science.293.5533.1237a

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


Exactly how light touches off the chain of events that converts a ghostly pale seedling into a green, photosynthesizing plant has long been a mystery. Now, a team of scientists has uncovered a surprisingly simple three-step pathway involving blue light that solves part of the mystery. In a report published online this week by Science (, they show that in the plant Arabidopsis thaliana, the photoreceptors that detect blue light interact directly with a protein known to regulate light responses in plants. This suggests that the light signal may be transmitted to that protein without the intercession of other proteins.