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Cyclophilin Participates in Responding to Stress Situations in Porphyra haitanensis (Bangiales, Rhodophyta)

Authors

  • Zhaojun Jia,

    1. College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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  • Jianfeng Niu,

    1. Institute of Oceanology, The Chinese Academy of Sciences (IOCAS), Qingdao, China
    Current affiliation:
    1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
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  • Li Huan,

    1. Institute of Oceanology, The Chinese Academy of Sciences (IOCAS), Qingdao, China
    2. Graduate University of the Chinese Academy of Sciences, Beijing, China
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  • Xiaojie Wu,

    1. College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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  • Guangce Wang,

    Corresponding author
    1. Institute of Oceanology, The Chinese Academy of Sciences (IOCAS), Qingdao, China
    • College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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  • Zhaojun Hou

    1. College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
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Author for correspondence: e-mail gcwang@qdio.ac.cn.

Abstract

Porphyra haitanensis (T. J. Chang & B. F. Zheng) is an important economic alga found off the southern coast of China. It has evolved a strong tolerance against stress, which is an important survival characteristic. Cyclophilin has been shown to be involved in the stress response of plants and algae. To investigate the tolerance against stress in Porphyra, we isolated the cyclophilin PhCYP18 gene (Accession number JQ413239) and measured its expression over different generations and stress conditions. In P. haitanensis, cyclophilin PhCYP18 accumulated more in the filamentous sporophyte generation than in the blade gametophyte generation. This difference was thought to be due to harsh environments and a gene dosage effect. It has been found, however, that PhCYP18 expression was dysregulated in blades under high salt stress, strong irradiance stress and multifactorial stress compared to blades under normal conditions. Moreover, the changes were not linearly related to the degree of stress. It was therefore thought that PhCYP18 actively responded to stress situations and induced strong stress tolerance, which is evident in P. haitanensis.

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