Effect of a gibberellin-biosynthesis inhibitor treatment on the physicochemical properties of sorghum starch

Li, Enpeng, Hasjim, Jovin, Dhital, Sushil, Godwin, Ian D. and Gilbert, Robert G. (2011) Effect of a gibberellin-biosynthesis inhibitor treatment on the physicochemical properties of sorghum starch. Journal of Cereal Science, 53 3: 328-334. doi:10.1016/j.jcs.2011.02.002


Author Li, Enpeng
Hasjim, Jovin
Dhital, Sushil
Godwin, Ian D.
Gilbert, Robert G.
Title Effect of a gibberellin-biosynthesis inhibitor treatment on the physicochemical properties of sorghum starch
Journal name Journal of Cereal Science   Check publisher's open access policy
ISSN 0733-5210
1095-9963
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1016/j.jcs.2011.02.002
Volume 53
Issue 3
Start page 328
End page 334
Total pages 7
Place of publication London, United Kingdom
Publisher Academic Press
Collection year 2012
Language eng
Formatted abstract
Inhibition of plant growth by Trinexapac-ethyl, TE, a gibberellin-biosynthesis inhibitor, can produce a shorter stemmed plant, requiring less nutrients and water to grow, while maintaining grain yield. Although TE and other plant growth regulators are commonly used in grain crops, their effects on starch biosynthesis in the grains have not been systematically examined. The changes in the structural and functional properties of starch in grains harvested from TE-treated sorghum (Sorghum bicolor (L.) Moench) were examined, and the results compared with those from the untreated controls. TE treatment had little or no effects on the molecular structures of starch, starch granule morphology, and starch and amylose contents, but increased the protein content of the grains significantly. Consistent with the lack of change in the molecular structure, there were no significant effects on the thermal properties of the
starch. The pasting properties of TE-treated sorghum flours, however, showed lower peak viscosity, trough, and final viscosity, which were attributed to their higher protein contents. The TE treatment thus does not have an appreciable effect on the biosynthesis of starch during grain development in sorghum.
Keyword Trinexapac-ethyl
Starch
Sorghum
Pasting and thermal properties
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Agriculture and Food Sciences
Centre for Nutrition and Food Sciences Publications
 
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