高浓度镉胁迫对茶树生理及吸收积累特性的影响

doi:10.13305/j.cnki.jts.2012.02.010

Abstract

Abstract: ：Through the soil pot experiment, investigation on the influence of high concentrations of cadmium stress on the growth, absorbtion and accumulation physical characteristics of tea plant by using Mingshanbaihao cultivar as testing material. The results showed that: Tea plants did not show obvious symptoms under the cadmium concentration of 0~120 mg/kg. The growth of various organs, chlorophyll synthesis and photosynthesis were significantly inhibited by increasing concentrations of Cd. Superoxide dismutase(SOD), peroxidase(POD), catalase(CAT) activity were gradually reduced accordingly. The content of malondialdehyde(MDA), proline(Pro) and relative conductivity(RC) increased substantially. Cadmium in various organs(y) had a significant or highly significant positive correlation with Cd concentration(x₁) and available cadmium content in soil(x₂). The order of cadmium contents in various organs was Fibrous roots> Roots> Stems> Branches> Leaves> New sterns>. The migration of available cadmium in soil from the underground parts to aboveground parts was the main source of cadmium in tea plants. Cadmium in tea plants mostly fixed by fibrous roots and roots, simultaneously, only a low ratio was transported to aboveground.

Key words: Cd, duress, tea plant, physiological, accumulating abilities

CLC Number:

WANG Chun-mei, TANG Qian, ZHANG Xiao-qin, ZHANG Dong-chuan. Effect of High Concentrations of Cd Stress on the Physiological Characteristics, Absorbtion and Accumulation in Tea Plant[J]. Journal of Tea Science, 2012, 32(2): 107-114.

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Effect of High Concentrations of Cd Stress on the Physiological Characteristics, Absorbtion and Accumulation in Tea Plant

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