The greenness of leaves is due to the presence of chlorophyll. The plant with high chlorophyll content will have
high rate of photosynthesis. Obviously higher greenness was observed in C1 (< 10 kDa), C2 (10-30 kDa) and C3
(30-50 kDa) at all concentration of chitosan than in C4 (100-300 kDa), C5 (> 300 kDa), C6 (Irradiated chitosan),
C7 (Unirradiated chitosan) at all concentration and in control. Fig.2 shows the higher greenness of corn plants
sprayed with degraded chitosan (C3 at 100 ppm) compared with the control. As a result, corn plants treated with
lower molecular weight (C1-C3) chitosan were more greenness than that treated with higher molecular weight
chitosan.