Tocopherol levels and composition in stressed wild-type and 35S::HPT1 plants. A, α-Tocopherol; B, γ-tocopherol; C, β-tocopherol; D, δ-tocopherol. Leaves of stressed 35S::HPT1 plants accumulated slightly more α-tocopherol than those of wild-type plants. Large differences are evident in the levels of β-, γ-, and δ-tocopherol between 35S::HPT1 and wild type.