The effect of short-term cold exposure on the change in the concentration of free proline in various birch species <i>in vitro</i>

In natural conditions of growth, forest woody plants constantly face negative environmental factors. Environmentally unfavorable impacts certainly affect the physiological and biochemical processes occurring in lead to activation their own protective mechanisms. recent years, methods biotechnology (cell tissue selection) have been increasingly used study adaptive capabilities, as well degree tolerance abiotic stress our work, we evaluated specifics reaction Betula pendula Roth, Roth var. carelica (Mercklin) L. Hmet-Ahti pubescens Ehrh. vitro, particular change level free proline low-temperature (+4C) different duration times. It was found that highest value amino acid content relation control Merckl. clones ranged from 163 206%, 103 128% 101 131%, respectively. Uniformity noted among according response stress. The relationship between ability produce more successful adaptation cold shock revealed.