Pre-harvest Methyl Jasmonate Treatment Enhances Cauliflower Chemoprotective Attributes Without a Loss in Postharvest Quality

Kang Mo Ku, Jeong Hee Choi, Mosbah M Kushad, Elizabeth H Jeffery, John A Juvik

Research output: Contribution to journalArticle

Abstract

Methyl jasmonate (MeJA) treatment can significantly increase glucosinolate (GS) concentrations in Brassica vegetables and potentially enhance anticancer bioactivity. Although MeJA treatment may promote ethylene biosynthesis, which can be detrimental to postharvest quality, there are no previous reports of its effect on cauliflower postharvest quality. To address this, cauliflower curds in field plots were sprayed with either 0.1 % Triton X-100 (control) or 500 μM MeJA solutions four days prior to harvest, then stored at 4 °C. Tissue subsamples were collected after 0, 10, 20, and 30 days of postharvest storage and assayed for visual color change, ethylene production, GS concentrations, and extract quinone reductase inductive activity. MeJA treatment increased curd GS concentrations of glucoraphanin, glucobrassicin, and neoglucobrassicin by 1.5, 2.4, and 4.6-fold over controls, respectively. MeJA treated cauliflower showed significantly higher quinone reductase activity, a biomarker for anticancer bioactivity, without reducing visual color and postharvest quality for 10 days at 4 °C storage.

Original languageEnglish (US)
Pages (from-to)113-117
Number of pages5
JournalPlant Foods for Human Nutrition
Volume68
Issue number2
DOIs
StatePublished - Jun 2013

Keywords

  • Brassica oleracea L.
  • Glucosinolates
  • Methyl jasmonate
  • Postharvest storage
  • Quinone reductase activity

ASJC Scopus subject areas

  • Food Science
  • Chemistry (miscellaneous)

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