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Related Experiment Video

Updated: Dec 23, 2025

Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
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[Construction and function of a root-specific promoter SRSP].

Wenwen Cui1,2, Jing Chi2, Yanfang Feng1

  • 1School of Life Sciences, Northeast Agricultural University, Harbin 150000, Heilongjiang, China.

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|April 30, 2020
PubMed
Summary

Scientists designed a synthetic root-specific promoter (SRSP) to enhance stress-related gene expression in crops. This novel promoter demonstrated root-specific activity in transgenic tobacco, offering potential for improved crop resilience and yield.

Keywords:
cis-acting elementsgusroot-specific promotersynthetic promoter

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Area of Science:

  • Plant Molecular Biology
  • Synthetic Biology
  • Agricultural Science

Background:

  • Roots are vital for water and nutrient absorption but susceptible to various stresses, impacting crop yield.
  • Developing tissue-specific promoters is crucial for targeted gene expression and functional analysis in crops.

Purpose of the Study:

  • To design and synthesize a novel root-specific promoter (SRSP) for driving gene expression in plant roots.
  • To evaluate the root-specific expression capability of the designed SRSP promoter in transgenic plants.

Main Methods:

  • A synthetic root-specific module (pro-SRS) was constructed using four root-specific cis-acting elements in tandem.
  • The pro-SRS module was fused with a minimal CaMV 35S promoter to create the SRSP promoter.
  • SRSP promoter constructs were transformed into tobacco plants using Agrobacterium-mediated transformation.
  • Root-specific expression was analyzed using Real-time PCR (RT-PCR) and GUS histochemical staining.

Main Results:

  • The synthesized SRSP promoter successfully conferred root-specific gene expression in transgenic tobacco plants.
  • RT-PCR and GUS staining confirmed the promoter's activity was confined to the root tissues.
  • The study demonstrated that repeated arrangements of cis-acting elements can effectively create functional tissue-specific promoters.

Conclusions:

  • The SRSP promoter is a functional tool for achieving root-specific gene expression in plants.
  • This research provides a foundation for designing rationally engineered tissue-specific promoters for agricultural applications.
  • The synthetic promoter holds potential for enhancing crop stress tolerance and optimizing gene expression strategies.