Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071, China;
Department of Environmental Science, Qingdao University, Qingdao 266071, China;
Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071, China;
Department of Marine Biology, Ocean University of Qingdao, Qingdao 266003, China;
axenic culture; conchocelis; antibiotics; Porphyra;