Volume 18 Issue 5
Oct.  2022
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ZHOU Wei, WU Hui, HUANG Jingjing, ZHAO Xixing, WANG Jingwen, WANG Jinguo. Effects of elevated CO2 and photoperiod on growth and physiological performance of seedlings of Ulva prolifera[J]. South China Fisheries Science, 2022, 18(5): 30-38. DOI: 10.12131/20210278
Citation: ZHOU Wei, WU Hui, HUANG Jingjing, ZHAO Xixing, WANG Jingwen, WANG Jinguo. Effects of elevated CO2 and photoperiod on growth and physiological performance of seedlings of Ulva prolifera[J]. South China Fisheries Science, 2022, 18(5): 30-38. DOI: 10.12131/20210278
shu

Effects of elevated CO2 and photoperiod on growth and physiological performance of seedlings of Ulva prolifera

  • 1.

    Jiangsu Ocean University/Jiangsu Key Laboratory of Marine Bioresources and Environment/Key Laboratory of Coastal Salt Marsh Ecosystems and Resources, Ministry of Natural Resources, Lianyungang 222005, China

  • 2.

    Jiangsu Key Laboratory of Marine Biotechnology, Lianyungang 222005, China

  • 3.

    Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Lianyungang 222005, China

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  • Received Date: September 25, 2021
  • Revised Date: December 23, 2021
  • Accepted Date: February 04, 2022
  • Available Online: February 20, 2022
    Graphical Abstract
    • Abstract
  • Ulva prolifera seedlings, which are the main component of the natural "seed bank" of green tide algae, play an important role in the occurrence and development of green tide. In order to understand the causes of the early outbreak of the green tide of U. prolifera and provide basic data for its early warning and prevention, we studied the growth and physiological responses of seedlings after the seedlings being cultured at two different CO2 levels (LC: 400 μatm; HC: 1 000 μatm) in combination with three different photoperiods (LL: 10 L∶14 D; ML: 12 L∶12 D; HL: 14 L∶10 D). The relative growth rate of seedlings were significantly enhanced by elevated CO2 under three light-dark regimes (P<0.05). The seedlings showed an obvious higher growth rate and a lower dark respiration rate (Rd) by HL treatment than by ML treatment. The impact of elevated CO2 and illumination time on the photochemical performance was not obvious. Elevated CO2 and longer illumination time had negative effects on chlorophyll a (Chl a), chlorophyll b (Chl b) and carotenoids (Car) content. The results suggest that the growth and physiological of seedlings are significantly influenced by elevated CO2 and photoperiod (P<0.05). HC and HL promoted the growth of its seedlings and increased the possibility of outbreak of green tide caused by U. prolifera. This study provides basic data for indepth understanding of the causes of green tide algae outbreak.
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    • References (36)
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