徐慧琳; 曾文炉; 陈翠红; 周启星
June 2016
Journal of Agro-Environment Science;2016, Vol. 35 Issue 6, p1021
Academic Journal
In an indoor pot experiment, biomass of wheat seedlings and accumulation of AHTN[1-(5,6,7,8-tetrahydro-3,5,5,6,8,8-hexamethyl-2-naphthalenyl-)-Ethanone] in wheat seedlings were investigated in a soil polluted by AHTN and Cd to examine the influences of Cd on the bioavailability of AHTN to the wheat seedlings. At the same time, Tenax-TA[poly(2,6-diphenyl-p-phenylene oxide)], SPME(Solid phase microextraction) fibers and TECAMs(Triolein embedded cellulose acetate membranes) were used to extract AHTN from soil and to assess the bioavailability of AHTN to wheat(Triticum aestivum). Results showed that the biomass of wheat seedlings in AHTN-Cd treatment was lower than that in single AHTN treatment. At 5 mg·kg-1 of AHTN concentration, the accumulation of AHTN in different parts of wheat seedlings was inhibited by Cd, and the highest inhibition rate was 39.1%. The transfer of AHTN from the roots to the shoots slowed down in the presence of Cd, with the highest inhibition rate of 19.0%. At 10 mg·kg-1 of AHTN concentration, the accumulation of AHTN in wheat seedlings was induced by Cd, with the highest induction rate of 38.4%. The transfer of AHTN from the roots to the shoots was induced in the presence of Cd, and the highest induction rate was 68.5%. The concentrations of AHTN extracted by Tenax for 24 h, SPME for 12 h and TECAMs for 12 h correlated well with the concentrations in wheat roots, which indicated that Tenax 24 h, SPME 12 h and TECAMs 12 h-extracted fractions could serve as a good predictor of the bioavailability of AHTN to wheat.


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