THE SHADE AVOIDANCE SYNDROME - MULTIPLE RESPONSES MEDIATED BY MULTIPLE PHYTOCHROMES

In recent years, the concept of shade avoidance has provided a functio nal meaning to the role of the phytochrome photoreceptor family in mat ure plants in their natural environment, and the question of which of these phytochromes is responsible for shade avoidance reactions has in evitably been raised. Unfortunately, a misconception has arisen that p hytochrome B is solely responsible for detecting the environmental sig nal that initiates the shade avoidance syndrome. This view is too simp listic, and is based upon a selective interpretation of the available evidence, In this short Commentary, we review the concept of the shade avoidance syndrome, show how the misconception arose, and emphasize t he plurality of perception and response that is crucial to successful competition for light.