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. 2019 Feb 26;10:233. doi: 10.3389/fpls.2019.00233

Figure 4.

Figure 4

LDL1/2-HDA6 is involved in regulation of CCA1/LHY. (A) Expression of CCA1 and LHY in TOC1-OE plants, hda6/ldl1/2, and WT. Gene expression levels were determined by qRT-PCR and normalized to UBQ10. Plants were grown under 12/12 light/dark for 14 days and collected on ZT0. (B) Transient luciferase assays in CCA1pro::CCA1:LUC (pCCA1:LUC) transformed protoplasts. CaMV 35S promoter driven TOC1, HDA6, or LDL1 effector constructs were introduced into mesophyll protoplasts. Samples were collected on ZT0 after 12 h of transformation. Relative Light Units (RLU) represents firefly luciferase normalized by co-expressed 35S pro::Renilla luciferase. 35Spro::GFP transformed protoplasts were used as the negative control. Data points represent the average of three technical replicates. Error bars correspond to SD from three biological replicates. P < 0.05, ∗∗P < 0.005 (Student’s t-test).