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Genes 2016, 7(5), 19; doi:10.3390/genes7050019

Transcriptome-Wide Survey and Expression Profile Analysis of Putative Chrysanthemum HD-Zip I and II Genes

College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
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Academic Editors: J. Peter W. Young and Lukas Mueller
Received: 31 January 2016 / Revised: 5 April 2016 / Accepted: 3 May 2016 / Published: 17 May 2016
(This article belongs to the Section Population and Evolutionary Genetics and Genomics)
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Abstract

The homeodomain-leucine zipper (HD-Zip) transcription factor family is a key transcription factor family and unique to the plant kingdom. It consists of a homeodomain and a leucine zipper that serve in combination as a dimerization motif. The family can be classified into four subfamilies, and these subfamilies participate in the development of hormones and mediation of hormone action and are involved in plant responses to environmental conditions. However, limited information on this gene family is available for the important chrysanthemum ornamental species (Chrysanthemum morifolium). Here, we characterized 17 chrysanthemum HD-Zip genes based on transcriptome sequences. Phylogenetic analyses revealed that 17 CmHB genes were distributed in the HD-Zip subfamilies I and II and identified two pairs of putative orthologous proteins in Arabidopsis and chrysanthemum and four pairs of paralogous proteins in chrysanthemum. The software MEME was used to identify 7 putative motifs with E values less than 1e-3 in the chrysanthemum HD-Zip factors, and they can be clearly classified into two groups based on the composition of the motifs. A bioinformatics analysis predicted that 8 CmHB genes could be targeted by 10 miRNA families, and the expression of these 17 genes in response to phytohormone treatments and abiotic stresses was characterized. The results presented here will promote research on the various functions of the HD-Zip gene family members in plant hormones and stress responses. View Full-Text
Keywords: Chrysanthemum morifolium; HD-Zip; phylogenetic analysis; stress response Chrysanthemum morifolium; HD-Zip; phylogenetic analysis; stress response
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Song, A.; Li, P.; Xin, J.; Chen, S.; Zhao, K.; Wu, D.; Fan, Q.; Gao, T.; Chen, F.; Guan, Z. Transcriptome-Wide Survey and Expression Profile Analysis of Putative Chrysanthemum HD-Zip I and II Genes. Genes 2016, 7, 19.

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