In an acetone extract, chlorophyll a (Chl a) showed the maximum absorbance at 661.6 nm, chlorophyll b (Chl b) at 644.8 nm and total carotenoids at 470 nm and the concentrations of Chl a, Chlb and the sum of carotenoids (cx ? c) was calculated using the following equations for acetone extraction, where the pigment concentrations are given in lg/mL extract solution.