3.3. Cadmium concentration in the plant
Mycorrhizal colonization and Cd concentration in the soil significantly affected Cd accumulation in the plant.
In the shoots, no significant difference (P<0.05) was observed between plants exposed to the soils treated with different levels of Cd (Fig. 2a). Non inoculated P. pinaster seedlings growing at 30 mg Cd kg−1 had a 2.2-fold higher metal concentration in the roots than those growing at 15 mg Cd kg−1 (Fig. 2b).
Significant (P<0.05) differences in Cd accumulation were found in plants inoculated with ECM fungi. At the highest Cd concentration, both ECM fungi induced significantly (P<0.05) lower metal accumulation in the root system. Seedlings inoculated with R. roseolus showed a 1.3-fold higher Cd accumulation in the shoots than the non inoculated counterparts, at both Cd concentrations.
Plants inoculated with R.roseolus had very similar metal uptake at 15 and 30 mg Cd kg−1 whereas seedlings inoculated with S.bovinus growing at 30 mg Cd kg−1 showed a 1.6-fold and 2.2-fold higher shoot and root accumulation, respectively.
Moreover, the interaction between both fungal inoculation and Cd concentration in the soils was also significant, as shown by the twoway ANOVA performed for Cd accumulation in the plant versus the ECM fungi and the Cd concentration on the soil (Table 3).
การแปล กรุณารอสักครู่..
