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Non-mycorrhizal Corylus avellana L. seedlings and filbert seedlings colonized with Tuber albidum Pico were grown in semihydroponic culture with frequent renewed nutrient solution. The seedlings were exposed to 0.96 μM of KCr(SO4)2 ·12H2O and of K2CrO4 for one month. Such a low concentration of Cr slightly increased the fine root length. Chromium did not vary the degree of infection with T. albidum,...