Cross-adaptation of spring barley (Hordeum vulgare L.) to environmental stress induced by heavy metals

摘要

The aim of this study was to investigate the possibilities of spring barley (cv. 'Aura DS') cross-adaptation to the impact of different (Cu, Zn, Cr, Ni, Cd and Pb) heavy metals. The most efficient cross-adaptation was detected after pretreatment with Cd and Ni. Pretreat-ment with Cd caused the most essential increase in tolerance to Cr and Ni, was the only stressor to whose impact spring barley was not more tolerant after pretreatment with Cd. After pretreatment by Ni, spring barley grew approximately 1.5 times better than not adapted ones, and only Cr was the metal to whose impact spring barley was not more tolerant after pretreatment with Ni. Cr and Pb, contrary to Cd and Ni, were detected to be the metals that almost did not stimulate cross-adaptation of spring barley to the other heavy metals and even adaptation to themselves. Cross-adaptive relations among the heavy metals were fou to be not always reciprocal. Cadmium was detected as a heavy metal with the most both-sided cross-adaptive relations with other metals and any reciprocal cross-adaptive relation were not detected for Cr and Pb.