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Analysis of transcription factors among differentially expressed genes induced by drought stress in Populus davidiana
Vise andre og tillknytning
2017 (engelsk)Inngår i: 3 Biotech, E-ISSN 2190-5738, Vol. 7, artikkel-id 209Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Populus davidiana is native to the Korean Peninsula and is one of the most dominant and abundantly growing forest trees in eastern Asia. Compared to other Populus species such as P. trichocarpa, P. euphratica, and P. tremula, relatively little is known about P. davidiana. Here, we performed transcriptomic analysis of P. davidiana under drought stress induced by 10% polyethylene glycol. A total of 12,403 and 12,414 differentially expressed genes (DEGs) were successfully annotated with the P. trichocarpa reference genome after 6 and 12 h of treatment, respectively. Of these, a total of 404 genes (238 up-regulated and 166 down-regulated) after 6 h and 359 genes (187 up-regulated and 172 down-regulated) after 12 h of treatment were identified as transcription factors. Transcription factors known to be key genes for drought stress response, such as AP2-EREB, WRKY, C2H2, and NAC, were identified. This results suggesting that early induction of these genes affected initiation of transcriptional regulation in response to drought stress. Quantitative real-time PCR results of selected genes showed highly significant (R = 0.93) correlation with RNA-Seq data. Interestingly, the expression pattern of some transcription factors was P. davidiana specific. The sequence of P. davidiana ortholog of P. trichocarpa gene POPTR_0018s10230, which plays an important role in plant response to drought, was further analyzed as our RNA-Seq results showed highly significant changes in the expression of this gene following the stress treatment. Sequence of the gene was compared to P. trichocarpa gene sequence using cloning-based sequencing. Additionally, we generated a predicted 3D protein structure for the gene product. Results indicated that the amino acid sequence of P. davidiana-specific POPTR_0018s10230 is different at six different positions compared to P. trichocarpa, resulting in a significantly different structure of the protein. Identifying the transcription factors expressed in P. davidiana under drought stress will not only offer clues for understanding the underlying mechanisms involved in drought stress physiology but also serve as a basis for future molecular studies on this species.

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Springer, 2017. Vol. 7, artikkel-id 209
Emneord [en]
Drought stress, Transcriptome, Poplar, Transcription factors
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-176695DOI: 10.1007/s13205-017-0858-7ISI: 000404680500015PubMedID: 28667649OAI: oai:DiVA.org:umu-176695DiVA, id: diva2:1500953
Tilgjengelig fra: 2020-11-14 Laget: 2020-11-14 Sist oppdatert: 2023-11-14bibliografisk kontrollert

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