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Response of catalase in Antarctic ice alga Chlamydomonas sp. ICE-L to heat stress
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Baosheng Yuan1, Xia Zhao1, Chenlin Liu2, *, Peiyu Zhang1
Haiyang Xuebao | 2019, 41(9) : 80 - 85
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Haiyang Xuebao | 2019, 41(9): 80-85
• Special Column of Polar Research •
Response of catalase in Antarctic ice alga Chlamydomonas sp. ICE-L to heat stress
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Baosheng Yuan1, Xia Zhao1, Chenlin Liu2, *, Peiyu Zhang1
Affiliations
  • 1 School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
  • 2 Center for Marine Ecology Research, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
Published: 2019-09-25 doi: 10.3969/j.issn.0253-4193.2019.09.007
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To investigate the heat stress responding strategies of Antarctic ice algae, the characteristics of a catalase gene CiCAT from the transcriptome of Antarctic ice alga Chlamydomonas sp. ICE-L were analyzed. The length of CiCAT is 2 066 bp encoding a catalase of 492 amino acids. In the phylogenetic tree of catalase amino acid sequences, Antarctic ice alga is clustered with green algae. The amino acid sequence identities of CiCAT are about 80.5% and 78.9% to the catalase from Dunaliella salina and Haematococcus lacustris, respectively. The changes of CiCAT gene expression and catalase activity in Antarctic ice alga were also investigated. Under heat stress, both the relative expression state of CiCAT gene and catalase activity changed from up-regulation to down-regulation over time. After heat stress treatment for 24 h, the expression of CiCAT gene was almost unchanged, while the enzyme activity in the heat treatment group was significantly higher than that in the control group. After 72 h's heat stress treatment, both gene expression and enzyme activity reached the highest level. Our preliminary results show that antioxidase system plays an important role in Antarctic ice algae responding to heat stress, which is similar to that in temperate algae and higher plants.

Antarctic ice alga  /  heat stress  /  catalase
Baosheng Yuan, Xia Zhao, Chenlin Liu, Peiyu Zhang. Response of catalase in Antarctic ice alga Chlamydomonas sp. ICE-L to heat stress[J]. Haiyang Xuebao, 2019 , 41 (9) : 80 -85 . DOI: 10.3969/j.issn.0253-4193.2019.09.007
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Article Info
doi: 10.3969/j.issn.0253-4193.2019.09.007
  • Receive Date：2018-11-02
  • Online Date：2026-04-03
  • Published：2019-09-25
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  • Received：2018-11-02
  • Revised：2019-04-09
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    1 School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
    2 Center for Marine Ecology Research, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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