Genomic insights into salt adaptation in a desert poplar

T Ma , J-Y Wang , G-K Zhou , Z Yue , Q-J Hu , Y Chen , B-B Liu , Q Qiu , Z Wang , J Zhang, K Wang , D-C Jiang , C-Y Gou , L-L Yu , D-L Zhan , R Zhou , W-C Luo , Y-Z Yang , S-K Pan , D-M FangY-D Luo , X Wang , G-N Wang , J Wang , Q Wang , X Lu , Z Chen , J-C Liu , Y Lu , Y Yin , H-M Yang , Richard John Abbott, Y-X Wu , D-S Wan , J Li , T-M Yin , M Lascoux, SP DiFazio , GA Tuskan , J Wang , J-Q Liu

Research output: Contribution to journalArticlepeer-review

173 Citations (Scopus)

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.
Original languageEnglish
Number of pages8
JournalNature Communications
DOIs
Publication statusPublished - 21 Nov 2013

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