Post‐flowering photoperiod has marked effects on fruit chemical composition in red raspberry (Rubus idaeus). (25th August 2014)

• Record Type: Journal Article
• Authors: Mazur, S.P.; Sønsteby, A.; Wold, A.‐B.; Foito, A.; Freitag, S.; Verrall, S.; Conner, S.; Stewart, D.; Heide, O.M.
• Is Part Of: Annals of applied biology. Volume 165:Number 3(2014)
• Page Start: 454
• Page End: 465
• Publication Date: 2014-08-25
• Subjects: Crop science -- Periodicals; Plants, Protection of -- Periodicals; Crops -- Ecology -- Periodicals; 630
• DOI: 10.1111/aab.12153
• Languages: English
• ISSNs: 0003-4746

Abstract

<abstract abstract-type="main" id="aab12153-abs-0001"> <title>Abstract</title> <p id="aab12153-para-0001">The effect of photoperiod on nutritional quality and chemical composition of 'Glen Ample' red raspberry has been studied under controlled environment conditions. Long day (LD) conditions during fruit growth and maturation significantly increased fruit concentrations of ascorbic acid, total phenolics, organic acids such as malic, quinic and ellagic acids, as well as the ferric reducing activity power, while reducing the concentrations of soluble solids, sucrose and the sugar/acid ratio. The levels of total anthocyanin and oxalic acid were not significantly affected by photoperiod whereas semi‐quantitative analysis indicated a significant increase in the levels of some ellagitannins. The same responses were found whether LD was established by day‐length extension with low‐intensity light or by night interruption, thus demonstrating that the observed changes in nutritional quality of raspberry fruit was mediated through specific photoperiodic mechanism(s) independently of the daily light energy supply.</p> </abstract>