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GA3 but not GR24 treatment affects the expression of the GFP-RGA protein in root apex of Arabidopsis. Roots of transgenic plants (rga/ga1-3 background) expressing the pRGA::GFP-RGA fusion were observed using confocal laser microscopy. Shown are three-dimensional projections of the fluorescence images of root tips treated with control solution (left column), 100 µm GA3 (middle column), or 10 µm GR24 (right column) at different times as indicated.
