Photomorphogenic mutants of Arabidopsis thaliana reveal activities of multiple photosensory systems during light-stimulated apical-hook opening

Fluence rate-response curves were generated for red-, far-red-, and blue-light-stimulated apical-hook opening in seedlings of several photomorphogenic mutants of Arabidopsis thaliana (L.) Heynh. Compared to wild-type plants, hook opening was reduced in the phytochrome-deficient hy1, hy2, and hy6 mut...

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