Effect of shrimp chitosan with different molecular weights. Orchid
protocorm-like bodies (PLB’s) were cultivated during 0, 3 and 6 weeks on
VW liquid medium supplemented with shrimp chitosan with molecular
weights of 1 kDa (oligo-chitosan), and of 10 and 100 kDa. Standard deviation
was calculated from three independent experiments by one-way
ANOVA.