Effects of different enhanced UV-B radiation doses on 5-day-old wheat seedlings.

<p>CK, control group; B, treatment groups with graded doses of UV-B radiation (B1, 2.5 KJ/m²/d; B2, 5 KJ/m²/d; B3, 7.5 KJ/m²/d; B4, 10 KJ/m²/d; B5, 12.5 KJ/m²/d). Data are means±SD (n = 3). Means with the same letter are not significantly different at Tukey’s test (p≤0.05).