Extreme environmental adaptation mechanisms of Antarctic bryophytes are mainly the activation of antioxidants, secondary metabolites and photosynthetic pathways

BMC Plant Biology

Research Article

Liping Zhang¹  Zhi Zhang¹  Yongjun Sun²  Wenming Ju²  Junhan Cao³  Kai Wang³  Ling Qin³  Changfeng Qu⁴  Jinlai Miao⁴ 

[1] Department of Special Medicine, School of Basic Medicine, Qingdao University, 266071, Qingdao, China;Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, 266061, Qingdao, China;Homey Group Co.,Ltd, 264300, Rongcheng, China;Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, 266061, Qingdao, China;Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, 266061, Qingdao, China;Laboratory for Marine Drugs and Bioproducts, Qingdao Pilot National Laboratory for Marine Science and Technology, 266237, Qingdao, China;Marine Natural Products R&D Laboratory, Qingdao Key Laboratory, 266061, Qingdao, China;

关键词: Antarctica;    Pohlia nutans;    Third-generation sequencing;    UVB;    Low-temperature;   

DOI  :  10.1186/s12870-023-04366-w

 received in 2022-10-26, accepted in 2023-06-22,  发布年份 2023

来源: Springer

【 摘 要 】

The environment in Antarctica is characterized by low temperature, intense UVB and few vegetation types. The Pohlia nutans M211 are bryophytes, which are the primary plants in Antarctica and can thrive well in the Antarctic harsh environment. The transcriptional profiling of Pohlia nutans M211 under low temperature and high UVB conditions was analyzed to explore their polar adaptation mechanism in the extreme Antarctic environment by third-generation sequencing and second-generation sequencing. In comparison to earlier second-generation sequencing techniques, a total of 43,101 non-redundant transcripts and 10,532 lncRNA transcripts were obtained, which were longer and more accurate. The analysis results of GO, KEGG, AS (alternative splicing), and WGCNA (weighted gene co-expression network analysis) of DEGs (differentially expressed genes), combined with the biochemical kits revealed that antioxidant, secondary metabolites pathways and photosynthesis were the key adaptive pathways for Pohlia nutans M211 to the Antarctic extreme environment. Furthermore, the low temperature and strong UVB are closely linked for the first time by the gene HY5 (hlongated hypocotyl 5) to form a protein interaction network through the PPI (protein–protein interaction networks) analysis method. The UVR8 module, photosynthetic module, secondary metabolites synthesis module, and temperature response module were the key components of the PPI network. In conclusion, this study will help to further explore the polar adaptation mechanism of Antarctic plants represented by bryophytes and to enrich the polar gene resources.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

【 图 表 】

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