Figure 3.

Reporter response and ABA levels in dependence of water potential. LUC expression of 4-d-old pAtHB6::LUC seedlings was recorded 24 h after exposure to various water potentials calibrated by supplementing the solidified medium with mannitol. Light emission (A) and ABA (B) levels of shoots were recorded in wild-type (black circles), ABA-deficient aba2-1 (white squares), and ABA-insensitive abi1-1 (white triangles) background. Values are means of 3 independent measurements, each comprising 15 seedlings.