Protein and starch characteristics of milled rice from different cultivars affected by transplantation date

The effects of transplantation date on milled rice (physicochemical, amino acids composition and protein profiling) of different cultivars and their starch characteristics (granules size distribution, pasting and thermal) were investigated. Head rice yield increased (2.0–4.1 %) and chalky grains (5–...

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Bibliographic Details
Published in:Journal of food science and technology 2016-08, Vol.53 (8), p.3186-3196
Main Authors: Kaur, Parmeet, Pal, Priyanka, Virdi, Amardeep Singh, Kaur, Amritpal, Singh, Narpinder, Mahajan, Gulshan
Format: Article
Language:English
Subjects:
Accumulation
Agricultural production
Agronomy
Air temperature
Amino acids
Analysis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Cultivars
Food
Food Science
Irrigation
Lipids
Nutrition
Original
Original Article
Precipitation
Proteins
Rice
Seeds
Starch
Studies
Temperature
Transplantation
Viscosity
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Summary:The effects of transplantation date on milled rice (physicochemical, amino acids composition and protein profiling) of different cultivars and their starch characteristics (granules size distribution, pasting and thermal) were investigated. Head rice yield increased (2.0–4.1 %) and chalky grains (5–10 %) decreased with delaying the paddy transplantation of different cultivars by 20 days. Delayed transplantation of paddy significantly increased asparagine, glutamine, threonine, cysteine, methionine, tryptophan, lysine and proline content in milled rice. Early transplantation of paddy showed higher accumulation of glutelin and prolamines than that in milled rice from delayed transplantation. The change in amino acid composition of milled rice with delay in transplantation was related to variation in accumulation of glutelin and prolamines. Starch from delayed transplanted paddy showed higher peak viscosity and lower breakdown viscosity than those from early transplanted paddy. These differences were due to higher accumulation of amylose in starch from delayed transplanted paddy than that from early transplanted paddy due to exposure of former to lower night air temperature during starch synthesis.
ISSN:0022-1155
0975-8402
DOI:10.1007/s13197-016-2293-x