Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants

doi:10.7525/j.issn.1673-5102.2021.06.017

Abstract

Abstract:

For the pollution of farmland around zinc mines was seriours in China， so an ideal method to screen plant materials with strong resistance to zinc was needed. 5 Sedum plants including Sedum spectabile， S. aizoon， S. hybridum， S. lydium and S. spurium ‘Coccineum were used as materials and potted planting， the different concentrations of exogenous zinc（0，80，160，320，800，1600，2 000 mg·kg^-1） added on the plants growth（biomass and plants height ） and the tolerance of to heavy metal zinc stress of plants was compared and analyzed respectively. The results showed that：The biomass and height of 5 Sedum plants increased first and then decreased with the concentration of heavy metal zinc increased and the growth of plants was inhibited， of which Sedum aizoon and Sedum lydium suffered more severe from zinc toxicity； The maximum growth of 5 Sedum plants appeared in different zinc concentrations， and the increase rate becoming negative appeared in different zinc concentrations either； The R² values in linear analysis of growth and zinc stress of 5 Sedum plants were better， coefficient of regression equation could explain the promotion and inhibition rate of biomass and plant height of 5 Sedum plants， in terms of biomass， the growth promotion rate of S. spurium ‘Coccineum’ was largest， inhibition rate of S. hybridum was largest， and in terms of plant height， the growth promotion and inhibition rate of S. spectabile was largest.

Key words: zinc stress, Sedum, biomass, height of plant, differences

CLC Number:

Q945.79

Ying WANG, Hong-Bo XU, Yang WANG, Meng-Qian WANG, Cheng-Zhong WANG, Yuan-Sen YIN, Xue SUN, Hui ZHOU, Li-Huan ZHUO. Difference of Tolerance to Heavy Metal Zinc Stress of Five Sedum Plants[J]. Bulletin of Botanical Research, 2021, 41(6): 982-992.

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