Cadmium Uptake and Subcellular Distribution in Shoots of Pakchoi and Cd-Ca Interaction

doi:10.7668/hbnxb.2010.06.045

Abstract

Abstract: Cd uptake, subcellular distribution and interaction between Cd and Ca in pakchio were studied.The results showed that Cd was mainly kept in the roots of two cuhivars of pakchoi, and the concentration of Cd in shoot. Hangzhouyoudong was higher than that of∞.Huqing No.1, but the concentration of Cd in root was the opposite.The Cd concentrations of subcellular fraction increased with increasing Cd concentration in the growth medium.Cd was accumulated mainly in cytoplasm of shoots and this accumulation Was fairly independent of Cd concentration in nutrient solution.The lowest Cd concentration was found in organelles fractions of both Cd concentrations.There were differences between two cuhivars which the distribution rate of cell wall fraction in ca. Hangzhouyoudong was higher than that.Huqing No.1.Ca was mainly retained in the cytoplasm fraction.In cytoplasm and cell wall fractions. Cd and Ca had a synergistic effect at 0.1 mg/L Cd concentration.and had an antagonistic effect at 1.0 mg/L Cd con· centration.

Key words: Pakchoi, Cadmium, Calcium, Subcellular distribution

CLC Number:

S634.3

SUN Guang-wen, ZHU Zhu-jun, FANG Xue-zhi. Cadmium Uptake and Subcellular Distribution in Shoots of Pakchoi and Cd-Ca Interaction[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(6): 229-232. doi: 10.7668/hbnxb.2010.06.045.

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