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Title:: Effect of Cr⁶⁺ on the Seed Germination and Chlorophyll Content of Viola tricolor

Author(s):: JIANG Cheng1; WANG Jingjia2; LI Jiamei1; LI Fu3; LI Xiuping1; WU Hengmei1; (1.College of Life Sciences,Jiamusi University,Jiamusi,Heilongjiang 154007；2.The Second Affiliated Hospital,Jiamusi University,Jiamusi,Heilongjiang 154002；3.College of Sciences,Jiamusi University,Jiamusi,Heilongjiang 154007)

Keywords:: Cr; Viola tricolor; seed germination; seedling growth; chlorophyll

Abstract:: The Viola tricolor seed was used as materials and water culture was used to explore the effects of different concentrations of hexavalent chromium ion stress on seed germination and seedling growth of Viola tricolor.The purpose of this study was to clear the harm and mechanism of chromium on Viola tricolor,and provide the basis for further research.The results showed that germination energy and germination rate were increased when the concentration of Cr6+ range was 0-5.0 mg·L-1,and decreased when the concentration of Cr6+ range was 5.0-80.0 mg·L-1；when the concentration of Cr6+ range was 0-80.0 mg·L-1,with the increasing of the concentration of Cr6+,root length of Viola tricolor decreased significantly,the seedling length first increased and then decreased,and there was the maximum when the the concentration of Cr6+ was 2.5 mg·L-1.When the concentration of Cr6+ range was 0-5.0 mg·L-1,the concentration of chlorophyll a,chlorophyll b and total chlorophyll were increased,and that was decreased when the concentration of Cr6+ range was 5.0-40.0 mg·L-1.