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Glucosinolate biosynthesis in Eruca sativa.

Dimitra Katsarou1, Michalis Omirou2, Kalliopi Liadaki1

  • 1University of Thessaly, Department of Biochemistry & Biotechnology, Larisa, Greece.

Plant Physiology and Biochemistry : PPB
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Summary

Nitrogen and sulfur availability significantly impact glucosinolate (GSL) levels and gene expression in Eruca sativa. Nutritional strategies can enhance these chemoprotective compounds in edible plants.

Keywords:
BiosynthesisBrassicaceaeCancer cellsCytotoxicityGlucosinolatesPlant nutrition

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Area of Science:

  • Plant Biochemistry
  • Molecular Biology
  • Nutritional Science

Background:

  • Glucosinolates (GSLs) are vital secondary metabolites in the Caparalles order, known for plant-biome interactions and chemoprotective properties.
  • Eruca sativa (arugula) is an agronomically and nutritionally valuable plant, closely related to Arabidopsis thaliana, making it a model for GSL research.

Purpose of the Study:

  • To identify genes in Eruca sativa involved in aliphatic and indolic glucosinolate biosynthesis.
  • To investigate the transcriptional and content-level effects of nitrogen (N) and sulfur (S) availability on GSL pathways.
  • To evaluate the biological activity of E. sativa extracts based on nutritional treatments.

Main Methods:

  • Identification of GSL biosynthetic genes in Eruca sativa.
  • Analysis of GSL content in leaf and root tissues under varying N and S conditions.
  • Transcriptional profiling of GSL biosynthetic genes.
  • Assessment of cytotoxicity of plant extracts on human cancer cells.

Main Results:

  • N and S supply significantly and interactively affected GSL content in leaves, correlating with gene expression.
  • Roots showed complex responses of GSLs and related genes to nutritional treatments.
  • Plant extracts exhibited altered cytotoxicity based on N and S availability, linked to GSL accumulation.

Conclusions:

  • Nitrogen and sulfur availability are critical factors controlling plant GSL content at the transcriptional level.
  • Tailored nutritional schemes can enhance the accumulation of chemoprotective glucosinolates in edible plants like E. sativa.
  • This highlights the potential for optimizing plant-based health benefits through controlled cultivation.