A tissue-specific promoter, Pt-RbcS, from Populus was isolated and cloned based on alignment of AtRBCS-2B cDNA with genomic Populus sequences. Sequence analysis of Pt-RbcS revealed cis-acting regulatory elements in the promoter region, including an ATCT-motif, BoxI, GAG-motif, I-box, G-box, BoxII, GATA-motif, and TCT-motif, which are involved in light responses. In transgenic tobacco lines carrying the β-glucuronidase (GUS) gene driven by the Pt-RbcS promoter, GUS expression was detected in leaves and stems, but not in roots. Transgenic poplar lines harboring constructs carrying the GUS gene driven by truncated Pt-RbcS promoters revealed distinctive expression patterns for five different promoter constructs. The Pt-RbcS promoter was expressed preferentially in photosynthetic tissues such as leaves and stems. Moreover, deletion analysis of the 1,547 bp Pt-RbcS promoter region revealed that a 927-bp DNA segment is critical for expression of Pt-RbcS in green tissues. Overall, our study suggests that the Pt-RbcS promoter from Populus could be applied to genetically improve the photosynthetic efficiency of woody plants. © 2012 Springer-Verlag.
CITATION STYLE
Wang, L., Li, L., Xu, L., Zhou, J., Zhuang, H., Gong, X., … Zhuge, Q. (2013). Isolation and Functional Analysis of the Poplar RbcS Gene Promoter. Plant Molecular Biology Reporter, 31(1), 120–127. https://doi.org/10.1007/s11105-012-0482-y
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