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Related Concept Videos

Riboswitches01:56

Riboswitches

Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...

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Comparative Transcriptomics Deciphers Quinclorac Selectivity in Rice and Tobacco.

Yuehong Huang1,2, Huan Niu1,2, Quanlin Pan1,2

  • 1College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.

Physiologia Plantarum
|July 12, 2026
PubMed
Summary

Quinclorac herbicide impacts tobacco more than rice. This study reveals rice uses glutathione detoxification and sustains photosynthesis, while tobacco activates defense pathways, explaining their differing sensitivities in crop rotation.

Keywords:
comparative transcriptomicsdetoxificationquincloracrice–tobacco rotationselective sensitivity

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Area of Science:

  • Plant molecular biology and stress response
  • Agricultural science and sustainable practices
  • Herbicide toxicology and crop physiology

Background:

  • Quinclorac herbicide is essential for rice cultivation but poses risks to subsequent tobacco crops in rotation systems.
  • The differing sensitivities of rice and tobacco to quinclorac are not well understood at a molecular level.
  • Understanding these differences is crucial for sustainable agricultural practices and managing herbicide residues.

Purpose of the Study:

  • To investigate the differential molecular mechanisms underlying quinclorac response in rice and tobacco.
  • To integrate transcriptomics, physiological profiling, and metabolic analysis to elucidate stress perception and phenotypic responses.
  • To provide a molecular basis for the varying tolerance of rice and tobacco to quinclorac.

Main Methods:

  • Comparative transcriptomics analysis to identify differentially expressed genes.
  • Physiological profiling to assess growth inhibition and oxidative damage.
  • Metabolic pathway analysis to understand biochemical responses to quinclorac.

Main Results:

  • Tobacco (K326) exhibited severe growth inhibition and oxidative damage under quinclorac exposure.
  • Rice (Nipponbare) maintained homeostasis, activating NAC transcription factors for glutathione-based detoxification and sustaining photosynthesis.
  • Tobacco activated mitogen-activated protein kinase (MAPK) and ethylene/jasmonic acid pathways, with significant MYB and WRKY transcription factor activity.

Conclusions:

  • Rice and tobacco employ distinct molecular strategies to cope with quinclorac stress.
  • Rice prioritizes detoxification and metabolic stability, while tobacco activates defense signaling pathways.
  • This study provides a framework for understanding quinclorac's differential impact and informs sustainable rice-tobacco crop rotation.