Influence of diurnal photosynthetic activity on the morphology, structure, and thermal properties of normal and waxy barley starch

Publikation: Forskning - peer reviewTidsskriftartikel

DOI

  • Avi Goldstein
    Avi GoldsteinDepartment of Food Science and Nutrition, University of Minnesota, St Paul, MN 55108, USA.
  • George Annor
    George AnnorDepartment of Food Science and Nutrition, University of Minnesota, St Paul, MN 55108, USA.
  • Varatharajan Vamadevan
    Varatharajan VamadevanDepartment of Food Science and Nutrition, University of Minnesota, St Paul, MN 55108, USA.
  • Ian Tetlow
    Ian TetlowDepartment of Molecular and Cellular Biology, Summerlee Science Complex, University of Guelph, N1G2W1, Canada.
  • Jacob J K Kirkensgaard
    Jacob J K KirkensgaardNiels Bohr Institute, University of Copenhagen,Universitetsparken 5, 2100 Copenhagen, Denmark.
  • Kell Mortensen
    Kell MortensenNiels Bohr Institute, University of Copenhagen,Universitetsparken 5, 2100 Copenhagen, Denmark.
  • Andreas Blennow
    Andreas BlennowDepartment of Plant and Environmental Sciences, University of Copenhagen, Denmark.
  • Kim H Hebelstrup
  • Eric Bertoft
    Eric BertoftDepartment of Food Science and Nutrition, University of Minnesota, St Paul, MN 55108, USA. Electronic address: eric.bertoft@abo.fi.
This study investigated the influence of diurnal photosynthetic activity on the morphology, molecular composition, crystallinity, and gelatinization properties of normal barley starch (NBS) and waxy barley starch (WBS) granules from plants cultivated in a greenhouse under normal diurnal (16 h light) or constant light photosynthetic conditions. Growth rings were observed in all starch samples regardless of lighting conditions. The size distribution of whole and debranched WBS analyzed by gel-permeation chromatography did not appear to be influenced by the different lighting regimes, however, a greater relative crystallinity measured by wide-angle X-ray scattering and greater crystalline quality as judged by differential scanning calorimetry was observed under the diurnal lighting regime. NBS cultivated under the diurnal photosynthetic lighting regime displayed lower amylose content (18.7%), and shorter amylose chains than its counterpart grown under constant light. Although the relative crystallinity of NBS was not influenced by lighting conditions, lower onset, peak, and completion gelatinization temperatures were observed in diurnally grown NBS compared to constant light conditions. It is concluded that normal barley starch is less influenced by the diurnal photosynthetic lighting regime than amylose-free barley starch suggesting a role of amylose to prevent structural disorder and increase starch granule robustness against environmental cues.
OriginalsprogEngelsk
TidsskriftInternational Journal of Biological Macromolecules
Vol/bind98
Sider (fra-til)188-200
Antal sider13
ISSN0141-8130
DOI
StatusUdgivet - maj 2017

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