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

Avi Goldstein, George Annor, Varatharajan Vamadevan, Ian Tetlow, Jacob J.K. Kirkensgaard, Kell Mortensen, Andreas Blennow, Kim H. Hebelstrup, Eric Bertoft

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Abstract

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.

LanguageEnglish (US)
Pages188-200
Number of pages13
JournalInternational Journal of Biological Macromolecules
Volume98
DOIs
StatePublished - May 1 2017

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Hordeum
Starch
Thermodynamic properties
Hot Temperature
Lighting
Amylose
Light
Greenhouses
Differential Scanning Calorimetry
Gel permeation chromatography
X ray scattering
Gel Chromatography
Cues
Differential scanning calorimetry
X-Rays
Crystalline materials
Temperature

Keywords

  • Barley
  • Diurnal activity
  • Starch granules
  • waxy starch

PubMed: MeSH publication types

  • Journal Article

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Influence of diurnal photosynthetic activity on the morphology, structure, and thermal properties of normal and waxy barley starch. / Goldstein, Avi; Annor, George; Vamadevan, Varatharajan; Tetlow, Ian; Kirkensgaard, Jacob J.K.; Mortensen, Kell; Blennow, Andreas; Hebelstrup, Kim H.; Bertoft, Eric.

In: International Journal of Biological Macromolecules, Vol. 98, 01.05.2017, p. 188-200.

Research output: Contribution to journalArticle

Goldstein, A, Annor, G, Vamadevan, V, Tetlow, I, Kirkensgaard, JJK, Mortensen, K, Blennow, A, Hebelstrup, KH & Bertoft, E 2017, 'Influence of diurnal photosynthetic activity on the morphology, structure, and thermal properties of normal and waxy barley starch' International Journal of Biological Macromolecules, vol 98, pp. 188-200. DOI: 10.1016/j.ijbiomac.2017.01.118
Goldstein, Avi ; Annor, George ; Vamadevan, Varatharajan ; Tetlow, Ian ; Kirkensgaard, Jacob J.K. ; Mortensen, Kell ; Blennow, Andreas ; Hebelstrup, Kim H. ; Bertoft, Eric. / Influence of diurnal photosynthetic activity on the morphology, structure, and thermal properties of normal and waxy barley starch. In: International Journal of Biological Macromolecules. 2017 ; Vol. 98. pp. 188-200
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