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Biologia

, Volume 73, Issue 4, pp 333–337 | Cite as

Photosynthetic response of Bangia fuscopurpurea (Bangiales, Rhodophyta) towards dehydration and hyposalinity

  • Wen Jun Wang
  • Zong Gen Shen
  • Xiu Tao Sun
  • Fu Li Liu
  • Zhou Rui Liang
  • Fei Jiu Wang
  • Jian Yi Zhu
Short Communication
  • 21 Downloads

Abstract

Bangia fuscopurpurea, an important farmed species in China, inhabits upper intertidal zones where it suffers periodical desiccation and salinity stress. However, the physiological response and acclimation mechanism of Bangia to abiotic stress is unknown. Here, the photosynthetic response of B. fuscopurpurea to desiccation and hyposalinity was investigated by using chlorophyll fluorescence measurement. The optimum photosynthetic efficiency of photosystem II (Fv/Fm), photochemical quenching (qP) and the non-photochemical quenching (NPQ) of B. fuscopurpurea thalli maintained at basal level when the absolute water content (AWC) was 32%. As AWC decreased from 32% to 9%, Fv/Fm dropped from 0.62 to 0.1 and NPQ increased from 0.2 to 1.2. No significant change occurred in the mean qP but great standard deviation was present as AWC was 9%. Fv/Fm, qP and NPQ of the thalli with 9% AWC fully recovered after rehydration. That B. fuscopurpurea kept high photosystem II photochemical reactions even when AWC was mere 32% enabled this species to survive extreme air drying at low tide. Fv/Fm and qP dropped while NPQ increased with 1 h of varying hyposaline treatment and they regained the basal levels after 6–24 h treatment. Nine days later, Fv/Fm, qP and NPQ levels of the thalli in 100% freshwater was equal to the control level (0.62, 0.9, 0.1, respectively). The present finding suggested that this alga has high photosynthetic capacity to survive during low tide, even during heavy rainfall. We hope this study would facilitate further investigation on the stress acclimation mechanism of B. fuscopurpurea.

Keywords

Abiotic stress Chlorophyll fluorescence Intertidal seaweed Marine Bangia Photosynthesis 

Abbreviations

AWC

Absolute water content

Fv/Fm

The optimum photosynthetic efficiency of photosystem II

NPQ

The non-photochemical quenching

PS II

Photosystem II

qP

The photochemical quenching

Notes

Acknowledgements

We are grateful to the editors and anonymous reviewers. This work was supported by the National Natural Science Foundation of China (31672630), the Special Scientific Research Funds for Central Non-profit Institutes, Chinese Academy of Fishery Sciences (2015A02XK01), the National Science and Technology Infrastructure Project (2012-2017), and the Open Funds of Seaweed Genetics and Germplasm Key Laboratory, Changshu Institute of Technology (2014-2016).

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Copyright information

© Plant Science and Biodiversity Centre, Slovak Academy of Sciences 2018

Authors and Affiliations

  1. 1.Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoChina
  2. 2.Laboratory for Marine Fisheries Science and Food Production ProcessesQingdao National Laboratory for Marine Science and TechnologyQingdaoChina
  3. 3.Changshu Institute of TechnologyChangshuChina

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