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. 2015 Jan 21;15:12. doi: 10.1186/s12870-014-0401-5

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© Qiao et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Neighbor-joining phylogeny of Hsfs from P. bretschneideri , P. trichocarpa and A. thaliana . The phylogenetic tree was obtained using the MEGA 6.0 software on the basis of amino-acid sequences of the N-terminal domains of Hsfs including the DNA-binding domain, the HR-A/B domain and the linker between these two domains. Bootstrap analysis was conducted with 1000 replicates. The abbreviations of species names are as follows: Pb, Pyrus bretschneideri; Pt, Populus trichocarpa; At, Arabidopsis thaliana.