Sr. No. Biochemical activity Activity folds change over 72 h of incubation
Green mature fruits Semi ripe fruits Ripe fruits
uninfected infected uninfected infected uninfected infected
1 Total phenol content mg/g fruit weight -1.47 -2.01 -1.28 -1.69 -1.29 -1.56
2 Total sugar content mg/g fruit weight +4.62 +9.07 +3.58 +3.27 +2.46 +2.38
3 PAL activity
U/hr./g fruit weight
+1.15 +1.61 +4.81 +3.68 +3.27 +1.04
4 PPO activity
U/mint./g fruit weight
+9.48 +12.17 +14.73 +19.33 +2.33 +2.94
5 POX activity
U/mint/g fruit weight
+8.0 +12.33 +6.17 +7.30 +2.24 +2.45
Table 2: Activity of total soluble sugar, phenol and defense related enzymes in banana fruits uninfected and infected by L. theobromae at different ripening stages.