Figure 1.

Supplemental green light induces a shade response in wild-type Arabidopsis Col-0. Wild-type (Col-0) Arabidopsis plants were grown under white light for approximately 3 weeks and then transferred to one of four light treatments: 50 μmol m⁻² s⁻¹ red and 40 μmol m⁻² s⁻¹ blue LED light (RB); 50 μmol m⁻² s⁻¹ red, 40 μmol m⁻² s⁻¹ blue, and 10 μmol m⁻² s⁻¹ green light (RBg); 50 μmol m⁻² s⁻¹ red, 40 μmol m⁻² s⁻¹ blue, and 40 μmol m⁻² s⁻¹ green light (RBG); or 20 μmol m⁻² s⁻¹ red, 40 μmol m⁻² s⁻¹ blue, and 40 μmol m⁻² s⁻¹ green light (rBG) for 3 to 5 d. Individual plant rosettes were dissected, and conspicuous leaf attributes were quantified. A, Single representative plants harvested from the different light treatments. B, Mean leaf angle of plants grown in the four light conditions. Leaf angle represents the number of degrees between the third pair of leaves. C, Mean petiole length as a percentage of total leaf length of different light-treated plants. The measurements in B and C were derived from the third true leaves from eight to 10 individual plants. Error bars represent se. Different letters represent statistically different means (P < 0.05). [See online article for color version of this figure.]