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Glucosinolate variability between turnip organs during development.

Guusje Bonnema1, Jun Gu Lee2, Wang Shuhang1

  • 1Plant Breeding, Wageningen University and Research, Wageningen, The Netherlands.

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|June 7, 2019
PubMed
Summary
This summary is machine-generated.

Glucosinolate profiles in turnip (Brassica rapa spp. rapa) varied significantly between plant parts and developmental stages. These chemical differences are influenced by genotype and gene expression, impacting turnip ecophysiology and breeding potential.

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Area of Science:

  • Plant Science
  • Agricultural Science
  • Biochemistry

Background:

  • Turnip (Brassica rapa spp. rapa) is a vital vegetable crop with distinct physiological roles for its leaves and tubers.
  • Leaves act as metabolic sources, while tubers transition from sinks to sources for reproductive development.

Purpose of the Study:

  • To investigate chemical changes, specifically glucosinolate profiles, in various turnip tissues throughout plant development.
  • To analyze the influence of genotype and gene expression on glucosinolate variation.

Main Methods:

  • Analysis of glucosinolate profiles using liquid chromatography-mass spectrometry (LC-MS).
  • Gene expression analysis focused on glucosinolate biosynthesis pathways.
  • Sampling of diverse tissues (seedling, leaves, tuber, stalk, flower, seed) at seven developmental time points across two genotypes.

Main Results:

  • Significant differences in glucosinolate profiles were observed between above-ground tissues and tubers, correlating with their physiological roles.
  • Distinct chemical profiles were noted between the two studied genotypes and across different developmental stages (early vs. late harvest).
  • Gene expression analysis provided insights into the genetic basis underlying observed glucosinolate variations.

Conclusions:

  • Glucosinolate profiles in turnip are dynamic, varying with tissue type, developmental stage, and genetic background.
  • Understanding these chemical variations is crucial for turnip ecophysiology and for breeding programs aiming for improved nutritional or agronomic traits.