Genomic insights into salt adaptation in a desert poplar

Tao Ma, Junyi Wang, Gongke Zhou, Zhen Yue, Quanjun Hu, Yan Chen, Bingbing Liu, Qiang Qiu, Zhuo Wang, Jian Zhang, Kun Wang, Dechun Jiang, Caiyun Gou, Lili Yu, Dongliang Zhan, Ran Zhou, Wenchun Luo, Hui Ma, Yongzhi Yang, Shengkai Pan, Dongming Fang, Yadan Luo, Xia Wang, Gaini Wang, Juan Wang, Qian Wang, Xu Lu, Zhe Chen, Jinchao Liu, Yao Lu, Ye Yin, Huanming Yang, Richard J. Abbott, Yuxia Wu, Dongshi Wan, Jia Li, Tongming Yin, Martin Lascoux, Stephen P. DiFazio, Gerald A. Tuskan, Jun Wang () and Jianquan Liu ()
Additional contact information
Tao Ma: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Junyi Wang: BGI-Shenzhen
Gongke Zhou: Key Laboratory of Biofuels and Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences
Zhen Yue: BGI-Shenzhen
Quanjun Hu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Yan Chen: BGI-Shenzhen
Bingbing Liu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Qiang Qiu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Zhuo Wang: BGI-Shenzhen
Jian Zhang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Kun Wang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Dechun Jiang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Caiyun Gou: BGI-Shenzhen
Lili Yu: BGI-Shenzhen
Dongliang Zhan: BGI-Shenzhen
Ran Zhou: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Wenchun Luo: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Hui Ma: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Yongzhi Yang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Shengkai Pan: BGI-Shenzhen
Dongming Fang: BGI-Shenzhen
Yadan Luo: BGI-Shenzhen
Xia Wang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Gaini Wang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Juan Wang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Qian Wang: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Xu Lu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Zhe Chen: BGI-Shenzhen
Jinchao Liu: BGI-Shenzhen
Yao Lu: BGI-Shenzhen
Ye Yin: BGI-Shenzhen
Huanming Yang: BGI-Shenzhen
Richard J. Abbott: School of Biology, Mitchell Building, University of St Andrews
Yuxia Wu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Dongshi Wan: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Jia Li: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University
Tongming Yin: The Key Lab of Forest Genetics and Gene Engineering, Nanjing Forestry University
Martin Lascoux: Evolutionary Biology Centre, Uppsala University
Stephen P. DiFazio: West Virginia University
Gerald A. Tuskan: Oak Ridge National Laboratory
Jun Wang: BGI-Shenzhen
Jianquan Liu: State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University

Nature Communications, 2013, vol. 4, issue 1, 1-9

Abstract: Abstract Despite the high economic and ecological importance of forests, our knowledge of the genomic evolution of trees under salt stress remains very limited. Here we report the genome sequence of the desert poplar, Populus euphratica, which exhibits high tolerance to salt stress. Its genome is very similar and collinear to that of the closely related mesophytic congener, P. trichocarpa. However, we find that several gene families likely to be involved in tolerance to salt stress contain significantly more gene copies within the P. euphratica lineage. Furthermore, genes showing evidence of positive selection are significantly enriched in functional categories related to salt stress. Some of these genes, and others within the same categories, are significantly upregulated under salt stress relative to their expression in another salt-sensitive poplar. Our results provide an important background for understanding tree adaptation to salt stress and facilitating the genetic improvement of cultivated poplars for saline soils.

Date: 2013
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DOI: 10.1038/ncomms3797

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