title: Effects of preharvest ultraviolet-C irradiation on fruit phytochemical profiles and antioxidant capacity in three strawberry (Fragaria × ananassa Duch.) cultivars.
abstract: BACKGROUND
  Ultraviolet-C (UV-C) has proven effective in extending shelf-life, reducing disease incidence and increasing the levels of health-promoting compounds in several crops. While most studies were conducted at the postharvest stage, our study examined the effect of preharvest UV-C application in three strawberry cultivars (Fragaria × ananassa Duch. 'Albion', 'Charlotte' and 'Seascape'). UV-C treatment was applied from the onset of flowering until the fruits reached commercial maturity on plants grown for two consecutive seasons under greenhouse conditions. The phytochemical profiles and antioxidant capacity of the fruits were assessed at harvest.
  
  
  RESULTS
  The ellagic acid and kaempferol-3-glucuronide contents were significantly increased only in fruits of the cultivar 'Albion' collected from UV-C-treated plants in season 1. UV-C did not consistently affect the other phenolic compounds that were measured. Based on the results of the ferric-reducing antioxidant power, oxygen radical absorbance capacity and total phenolic content assays, the antioxidant capacity of the three strawberry cultivars was not affected by UV-C. Season and cultivar had a decisive impact on these parameters.
  
  
  CONCLUSIONS
  The effect of preharvest UV-C on the levels of bioactive compounds in strawberry fruits appears to be cultivar- dependent, with season or growing conditions having a significant impact.
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.|College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.
authors.forename: Zhichun
authors.initials: Z
authors.lastname: Xie
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Marie Thérèse
authors.initials: MT
authors.lastname: Charles
authors.affiliation: College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.
authors.forename: Jinshuan
authors.initials: J
authors.lastname: Fan
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Denis
authors.initials: D
authors.lastname: Charlebois
authors.affiliation: Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, ON K1A 0C6, Canada.
authors.forename: Shahrokh
authors.initials: S
authors.lastname: Khanizadeh
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Daniel
authors.initials: D
authors.lastname: Rolland
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Dominique
authors.initials: D
authors.lastname: Roussel
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Martine
authors.initials: M
authors.lastname: Deschênes
authors.affiliation: Horticulture Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.
authors.forename: Claudine
authors.initials: C
authors.lastname: Dubé
mesh_terms: D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D004610:Ellagic Acid / Q000378:metabolism / Q000494:pharmacology; D005519:Food Preservation / Q000379:methods*; D031985:Fragaria / Q000737:chemistry / Q000145:classification / Q000528:radiation effects*; D005638:Fruit / Q000737:chemistry / Q000528:radiation effects*; D006801:Humans; D044949:Kaempferols / Q000378:metabolism / Q000494:pharmacology; D010636:Phenols / Q000378:metabolism / Q000494:pharmacology*; D064209:Phytochemicals / Q000378:metabolism / Q000494:pharmacology; D013045:Species Specificity; D014466:Ultraviolet Rays
chemical_list: D000975:Antioxidants; D044949:Kaempferols; D010636:Phenols; D064209:Phytochemicals; D004610:Ellagic Acid; C006552:kaempferol
keywords: UV-C; anthocyanins; ellagic acid; flavonols; preharvest; strawberry (Fragaria × ananassa Duch.)