The effects of light and increased CO<sub>2</sub> on the growth and physiological performances in marine green algae <em>Ulva prolifera</em> seedling

Gao Xiuxiu; Li Yahe; Duan Weijun; Xu Nianjun

doi:10.3969/j.issn.0253-4193.2015.10.008

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Gao Xiuxiu, Li Yahe, Duan Weijun, Xu Nianjun. The effects of light and increased CO2 on the growth and physiological performances in marine green algae Ulva prolifera seedling[J]. Haiyang Xuebao, 2015, 37(10): 80-87. doi: 10.3969/j.issn.0253-4193.2015.10.008

Citation:

Gao Xiuxiu, Li Yahe, Duan Weijun, Xu Nianjun. The effects of light and increased CO₂ on the growth and physiological performances in marine green algae Ulva prolifera seedling[J]. Haiyang Xuebao, 2015, 37(10): 80-87. doi: 10.3969/j.issn.0253-4193.2015.10.008

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The effects of light and increased CO₂ on the growth and physiological performances in marine green algae Ulva prolifera seedling

doi: 10.3969/j.issn.0253-4193.2015.10.008

1.
Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China;Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo 315211, China
2.
Ningbo Entry-Exit Inspection and Quarantine Bureau Technology Centre, Ningbo 315012, China

Received Date: 2015-02-11

Abstract

Abstract

Ocean acidification due to increasing anthropogenic CO₂ is expected to influence marine primary productivity. In order to investigate the interactive effects of increased light and CO₂ changes on macroalgae,we grew Ulva prolifera seedling under the normal CO₂ level (400 μL/L) and elevated CO₂ level (1 000 μL/L) conditions,the light levels set as 80 and 260 μmol/(m²·s),and measured its physiological performance. Research finding that the specific growth rate and activity of SOD was highest under high light and normal CO₂ level . However,the activity of CAT showed the highest value under the high CO₂ and low light conditions. Under the different treatments,there was no significant effect on the chlorophyll a and maximal photochemical yield of PSⅡ (F_v/F_m),while the largest ratios of chlorophylla to carotenoid occurred at nomal CO₂ and low light conditions. Meanwhile,the content of soluble protein was decreased by high light and high CO₂.
- CO₂,
- light,
- Ulva prolifera seedling,
- chlorophyll fluorescence efficiency,
- Antioxidant activity

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