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Effects of Fluctuating Light Density on the Growth and Chemical Constituents of Ulva pertusa

Laboratory studies were undertaken to determine the growth and chemical constituents of Ulva pertusa at fluctuating light density treatments. Results showed that the specific growth rates (SGR) of Ulva pertusa significantly increased at the fluctuating light density treatments than the constant light density. The ratios of Chl a / Chl b varied with the fluctuating light density. The protein contents of Ulva pertusa increased at fluctuating light density. In contrast, the soluble sugars contents of U. pertusa decreased at fluctuating light density.