Volume 3 Issue 3
Jun.  2007
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ZHANG Xin, ZOU Dinghui, XU Zhiguang, LIU Shuxia. Effects of increased atmospheric CO2 and N supply on some physiological and biochemical traits in the economic brown seaweed, Hizikia fusiformis (Sargassaceae, Phaeophyta)[J]. South China Fisheries Science, 2007, 3(3): 35-40.
Citation: ZHANG Xin, ZOU Dinghui, XU Zhiguang, LIU Shuxia. Effects of increased atmospheric CO2 and N supply on some physiological and biochemical traits in the economic brown seaweed, Hizikia fusiformis (Sargassaceae, Phaeophyta)[J]. South China Fisheries Science, 2007, 3(3): 35-40.
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Effects of increased atmospheric CO2 and N supply on some physiological and biochemical traits in the economic brown seaweed, Hizikia fusiformis (Sargassaceae, Phaeophyta)

  • Marine Biology Institute, Science Center, Shantou University, Shantou 515063, China

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  • Received Date: December 18, 2006
  • Revised Date: March 20, 2007
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    • Abstract

  • The marine macroalgae Hizikia fusiformis (Harvey) Okamura (Sargassaceae, Phaeophyta) was cultured under the condition of elevated atmospheric CO2and increased N supply to investigate the effects of increased CO2concentration and N supply on the growth, photosynthesis, and other related physiological and biochemical traits in this species. The experiment was designed for two CO2 levels which was 350 and 700 mol · mol-1, and two NO3-levels which was added 0, 500 mol · L-1 NaNO3in seawater. The algae cultured under non-N-enriched seawater, elevated CO2concentration had no significant effects on growth and biochemical traits. However, the algae cultured under N-enriched seawater, elevated CO2could effectively depress the growth.The ratio of fresh weight (FW)to dry weight (DW), the concentrations of soluble protein and soluble carbohydrate were decreased 4.5%, 15% and 32%. It suggested that increased N supply led to the accumulation of NO2-, and elevated CO2concentration caused pH value to decrease. This condition was well to form HNO2, which is toxic effect on H.fusiformis.

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    • References (16)
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