Abstract
X1-homologous genes (XHS) encode plant specific proteins containing three basic domains (XH, XS, zf-XS). In spite of their physiological importance, systematic analyses of ZmXHS genes have not yet been explored. In this study, we isolated and characterized ten ZmXHS genes in a whole-of-genome analysis of the maize genome. A total of ten members of this family were identified in maize genome. The ten ZmXHS genes were distributed on seven maize chromosomes. Multiple alignment and motif display results revealed that most ZmXHS proteins share all the three conserved domains. Putative cis-elements involved in abiotic stress responsive, phytohormone, pollen-specific and quantitative, seed development and germination, light and circadian rhythms regulation, Ca2+-responsive, root hair cell-specific, and CO2-responsive transcriptional activation were observed in the promoters of ZmXHS genes. Yeast hybrid assay revealed that the XH domain of ZmXHS5 was necessary for interaction with itself and ZmXHS2. Microarray data showed that the ZmXHS genes had tissue-specific expression patterns in the maize developmental steps and biotic stresses response. Quantitative real-time PCR analysis results indicated that, except ZmXHS9, the other nine ZmXHS genes were induced in the seedling leaves by at least one of the four abiotic stresses applied.







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- ABA:
-
Abscisic acid
- bZIP:
-
Basic leucine zipper
- DAP:
-
Day after pollination
- ORF:
-
Open reading frame
- PEG:
-
Polyethylene glycol
- RDR6:
-
RNA-dependent RNA polymeraes 6
- XH:
-
X1 homologue
- XHS:
-
XH and XS domain
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Acknowledgments
We are grateful to editors and reviewers for their helpful comments and the providers who submitted the microarray data to the public expression databases which can be applied freely. This work was supported partly by the Beijing Municipal Science and Technology Commission (No. Z111100066111005 and Z121100001512012); Beijing Nova Program (No. Z121105002512031); Beijing Academy of Agriculture and Forestry Sciences (No. KJCX201102003), and the Youth Foundation (No. QNJJ201303).
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Zhang, Z., Chen, Y., Zhao, D. et al. X1-homologous genes family as central components in biotic and abiotic stresses response in maize (Zea mays L.). Funct Integr Genomics 14, 101–110 (2014). https://doi.org/10.1007/s10142-013-0343-2
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DOI: https://doi.org/10.1007/s10142-013-0343-2


