The Relationship Between Parameters of Electrical Impedance Spectroscopyand Some Physiological Parameters in Pinus bungeana Zucc. Needles DuringDehardening The Relationship Between Parameters of Electrical Impedance Spectroscopyand Some Physiological Parameters in Pinus bungeana Zucc. Needles DuringDehardening Cryo-protectant changes in roots of perennial grasses habituated in alpine area in spring related to dehardening