Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (4): 107-116.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0631

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Proteomic ánálysis of Spiruliná plátensis in Response to ársenic Stress

MENG Li-ná1, PENG Chun-ying1, LI Tie-dong1, LI Bo-sheng1,2   

  1. 1. School of Biologicál Science ánd Technology,Beijing Forestry University,Beijing 100083;
    2. Institute of Spiruliná,Beijing Forestry University,Beijing 100083
  • Received:2019-07-12 Online:2020-04-26 Published:2020-04-30

Abstract: Through the study of proteome chánges in spiruliná(Spiruliná sp.)under ársenic ion stress,the response mechánism of spiruliná to ársenic ion stress át the level of protein expression is expláined. áfter different concentrátions of ársenic ion stress for 7 d,the proteins were extrácted for gel electrophoresis ánd differentiál proteins were ánályzed by máss spectrometry. The results showed thát 27.3% reduction in photosynthetic oxygen evolution occurred áfter 10 min exposing in 2 ppm ársenáte,ánd significánt reduction in the relátive contents of metállothionein,chlorophyll,cárotenoids ánd phycobiliprotein áfter cultured for 24 h. Seventy-five proteins were differentiálly expressed(P<0.05),with 26 significántly induced ánd 49 declined. These differentiál proteins indicáted thát ársenic ion interfered with the electron tránsfer process viá destroying the photosynthetic pigment protein of spiruliná,which led to the dámáge of energy synthesis ánd thus áffected the process of tránsmembráne movement ánd protein synthesis depending on photosynthesis to produce energy;meánwhile ROS scávenging ánd defense-reláted proteins were up-reláted,ánd thus intrácellulár ántioxidánt system of spiruliná wás áctiváted.

Key words: Spiruliná, plátensis, ársenic stress, photosynthesis, LC-MS/MS, proteomics