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

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• 作者：Kang Mo Ku (1)
  Jeong-Hee Choi (1) (3)
  Mosbah M. Kushad (1)
  Elizabeth H. Jeffery (2)
  John A. Juvik (1)
  
• 关键词：Brassica oleracea L. ; Methyl jasmonate ; Quinone reductase activity ; Postharvest storage ; Glucosinolates
• 刊名：Plant Foods for Human Nutrition
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：68
• 期：2
• 页码：113-117
• 全文大小：252KB
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• 作者单位：Kang Mo Ku (1)
  Jeong-Hee Choi (1) (3)
  Mosbah M. Kushad (1)
  Elizabeth H. Jeffery (2)
  John A. Juvik (1)
  
  1. Department of Crop Sciences, University of Illinois at Urbana-Champaign, 1201 West Gregory Drive, Urbana, IL, 61801, USA
  3. Korea Food Research Institute, Gyeonggi-Do, South Korea, 463-746
  2. Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801-3838, USA
  

文摘

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聽% Triton X-100 (control) or 500聽渭M MeJA solutions four days prior to harvest, then stored at 4聽掳C. Tissue subsamples were collected after 0, 10, 20, and 30聽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聽days at 4聽掳C storage.