Experimenta LS means Groups C (30 min) 1142 A                       C* (30 min) 1025 A B                     K2 903   B                     C* (15 min) 754     C                   C*** 740     C                   A* (60 min) 710     C                   C (15 min) 704     C                   K4 703     C                   K1 695     C                   C** 651     C                   B* 611     C D                 D (60 min) 512       D E               L 427         E F             K3 387         E F G           J 365           F G H         I (30 min) 298           F G H I       G 252             G H I       H 233               H I       D (15 min) 181                 I J     M (30 min) 167                 I J K   I (15 min) 155                 I J K   M (15 min) 78                   J K L F 24.3                     K L N 7.3                       L

Table 3: Results of least square (LS) means comparison of increases in vitamin D2 (IU/70g) in mushrooms exposed under different conditions (Table 1 and Figure 2). Increases in vitamin D for experiments denoted by same capital letter for Group do not differ significantly (α=0.05). All treatments were done on an aluminum foil surface except those marked with * (aluminum pan), ** (white paper on glass pan), and *** (dark non-stick pan).