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《Marine Sciences》 2004-09
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Responses of bio-chemical compositions of four Antarctic ice microalgae to UV-B irradiation enhancement

MIAO Jin-lai1, KAN Guang-feng2, JIANG Ying-hui1, ZHANG Bo-tao2, LI Hao2, HOU Xu-guang3, LI Guang-you2(1. Key Laboratory of Marine Bio-active Substances, SOA, Qingdao 266061, China; 2. Marine Life College, Ocean University of China, Qingdao 266003, China; 3. Life Science College, Shandong University, Jinan 250100, China)  
UV-B irradiation environment in the Antarctic was setup to simulate in lab. changes in biochemical compositions in four algae. The results showed that after the treatment the contents of protein in four Antarctic ice microalga decreased obviously, and the compositions and contents of amino acids consisting of the protein also changed distinctly. Six amino acids, such as Pro and Pro-OH, increased markedly; seven amino acids, such as Glu and Val, decreased obviously. The contents of the total lipid of four Antarctic ice microalga increased obviously. Total lipid contents of two green algae increase by 30% percent, while two diatoms increase by 15%. Moreover, the contents of the unsaturated fatty acids increased while that of saturated fatty acids decreased, and some new compositions were synthesized in four algae. The elemental contents of Mg,Na and Al decreased while that of Fe,Ca,Zn and Mn increased. In all, the content of inorganic compositions decreased, but that of organic compositions increased. The results that main bio-chemical compositions in four algae changed markedly with UV-B enhancement showed that the Antarctic ice microalga responded to the enhancement of UV-B irradiation actively, and adapted themselves to the strong irradiation environment. Further study needs for be dene on the adaptation of Antarctic ice microalga to the strong UV-B irradiation environment in Antarctic area.
【Fund】: 国家自然科学基金资助项目 (40206022)
【CateGory Index】: Q946
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