Effects of lanthanum on root membrane permeability and nutrient contents in root exudate of rice

Abstract

Abstract: This study showed that when lanthanum was in lower concentration (≤50μg·ml^-1),the membrane permeability of rice root was stabilized by decreasing the electrolyte exosmosis,and the contents of K⁺,Ca²⁺,P and H⁺ in root exudate were lower than the control;while the concentration of La³⁺ was in the range of 100～400 μg·ml^-1,the electrolyte exosmosis was reduced in the first 6 hours,and then significantly increased.When the concentration of La³⁺ was over 500 μg·ml^-1,the electrolyte exosmosis was continuously enlarged because of the destruction of the membrane. Under this condition,K⁺,Ca²⁺,P and H⁺ in root exudate were higher than the control.It could be concluded that the concentration of 50 μg·ml^-1 La³⁺ was safe to rice growing.

CLC Number:

Q945.12

GAO Hongjian, CHANG Jiang, ZHANG Zili, JIANG Xin, ZHAO Zhenhua. Effects of lanthanum on root membrane permeability and nutrient contents in root exudate of rice[J]. Chinese Journal of Applied Ecology, 2004, (4): 651-654.

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