Manipulation of Continuous and End-of-Day Red/Far-Red Light Ratios Affects Glucobrassicin and Gluconasturtiin Accumulation in Cabbage (Brassica oleracea) and Watercress (Nasturtium officinale), Respectively

Ilse E. Renner, Gary Gardner, Vincent A. Fritz

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Cabbage (Brassica oleracea) and watercress (Nasturtium officinale) produce glucobrassicin (GBS) and gluconasturtiin (GNST), precursors of chemopreventive compounds. Their accumulation is affected by environmental signals. We studied the impact of the red to far-red light (R/FR) ratio on GBS concentration in red ″Ruby Ball″ and green ″Tiara″ cabbage. Foliar shading, via weed surrogates that competed with cabbage plants for specific durations, induced R/FR variation among treatments. ″Ruby Ball″ GBS concentrations were the highest when R/FR within the canopy was the lowest. ″Tiara″ was unaffected by competition. The same trend was observed in a controlled environment using R and FR LEDs without weeds present. ″Ruby Ball″ subjected to an R/FR = 0.3 treatment had 2.5- and 1.4-fold greater GBS concentration compared to R/FR = 1.1 and 5.0 treatments combined. Watercress given end-of-day (EOD) R and/or FR pulses after the main photoperiod had the lowest GNST concentrations after an EOD FR pulse but the highest concentrations after an R followed by FR pulse.

Original languageEnglish (US)
Pages (from-to)14126-14142
Number of pages17
JournalJournal of agricultural and food chemistry
Volume69
Issue number47
DOIs
StatePublished - Dec 1 2021

Bibliographical note

Funding Information:
This work was funded by the Minnesota Agricultural Experiment Station.

Publisher Copyright:
© 2021 American Chemical Society.

Keywords

  • Brassica oleracea
  • LEDs
  • Nasturtium officinale
  • chemoprevention
  • controlled environment
  • isothiocyanates
  • light quality
  • phytochrome
  • vegetative shading
  • weed competition

PubMed: MeSH publication types

  • Journal Article

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