Seedlings Stably Expressing UVR8C44 Show a Constitutive Photomorphogenic Phenotype.
(A) UVR8 protein levels in uvr8-7, wild-type (Wassilewskija [Ws]), YFP-NLS-C44-expression line 1, 13, and 15, and YFP-YFP-expression line (far right) seedlings.
(B) and (C) Hypocotyl growth in weak white light. Images of representative individuals (B) and quantification of hypocotyl lengths (C) of 4-d-old seedlings grown under white light are shown. Means and se are shown (n > 20).
(D) Transcript levels of CHS in uvr8-7/Pro35S:YFP-NLS-UVR8C44 transgenic seedlings (lines 1, 13, and 15) compared with a uvr8-7/Pro35S:YFP-YFP line (YFP-YFP) as measured by quantitative RT-PCR analysis. Error bars represent se in triplicate biological measurements.
(E) Coimmunoprecipitation of COP1 in protein extracts from uvr8-7, uvr8-7/Pro35S:YFP-YFP, and uvr8-7/Pro35S:YFP-NLS-UVR8C44 transgenic seedlings grown for 7 d in white light. IB, immunoblotting; IP, immunoprecipitation.