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Title:: Effects of Heavy Metal Ions Stress on Seed Germination and Seedling Physiological Indices of Green Bean

Author(s):: QI Wenjing; YU Han; ZHANG Jiahui; ZHANG Mengqi; XU Shengshi; CUI Yue; (Department of Bioscience,Changchun Normal University,Changchun,Jilin 130032)

Keywords:: heavy metal ions; seed germination; soluble sugar; soluble protein; green bean

Abstract:: In order to explore the toxic mechanism of heavy metals stress on the germination and growth of crops,the green bean seeds were used as materials,the seed germination and seedling physiological indices of green bean were compared and analyzed under different concentrations of Hg2(NO3)2,Pb(NO3)2 and CuCl2 treatment.The results showed that the stress of three heavy metal ions could inhibit the growth of root and stem of green bean seedlings,especially the CuCl2 and Hg2(NO3)2 stress.However,the soluble sugar content of green bean seeds increased significantly under the heavy metal ions stress.Under the stress of 50 mg·L-1 Hg2(NO3)2 and 150 mg·L-1 Pb(NO3)2,the accumulation of soluble sugar got to the peak.Moreover,Pb(NO3)2 stress promoted the accumulation of soluble protein in germinated green bean,rather than Hg2(NO3)2 and CuCl2 stress.