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Garry C. Whitelam, Emma Johnson, Jinrong Peng, Pierre Carol, Mary L. Anderson, John S. Cowl, Nicholas P. Harberd, Phytochrome A Null Mutants of Arabidopsis Display a Wild-Type Phenotype in White Light, The Plant Cell, Vol. 5, No. 7 (Jul., 1993), pp. 757-768
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Whitelam et al. (1993) studied this question.
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