Open Access
ARTICLE
Amylose Content and Starch Granule Size in Rice Grains are Affected By Growing Season
Hengdong Zhang1, Min Huang1,*, YingjuanWei2, Jiana Chen1, Shuanglü Shan1, Fangbo Cao1, Guanghui Chen1, Yingbin Zou1
1 Crop and Environment Research Center for Human Health, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.
2 Hunan Agricultural Product Processing Institute, Changsha, 410125, China.
* Corresponding Author: Min Huang. Email: .
Phyton-International Journal of Experimental Botany 2019, 88(4), 403-412. https://doi.org/10.32604/phyton.2019.07371
Abstract
Amylose content and starch granule size in grains influence rice
quality, which differs between the early (ES) and late season (LS). The objective
of this study was to determine the variation of amylose content and starch
granule size between seasons and find the main reasons (e.g., temperature and
solar radiation) for the observed variation. Field experiments with six rice
varieties (three high and three low amylose content rice) planted in the ES and
LS were conducted in 2016 and 2017, respectively. The mean temperatures
during the filling stage were higher in ES, however, the daily temperatures at
7-10 days after flowering (DAF) in 2016, and at 5-10, 13-14 DAF in 2017 were
higher in LS. The results showed that amylose content in LS was lower than in
ES with high amylose content rice varieties (HACV); the opposite trend occurred
with low amylose content rice varieties (LACV). The mean starch granule
diameter was higher in LS than ES in 2016, but the opposite result occurred in
2017 with all rice. Our results suggest that higher temperatures increased and
decreased the amylose content in HACV and LACV, respectively. Temperatures
at 5-15 DAF were important for the formation of starch granules: lower
temperatures during 10-14 DAF increased the proportion of larger starch
granules (d>6.21 μm, some with d>13.3 μm), and higher temperatures at 5-6
DAF increased the proportion of starch granules with diameter 4.24-6.21 μm.
Keywords
Cite This Article
Zhang, H., Huang, M., , Y., Chen, J., Shan, S. et al. (2019). Amylose Content and Starch Granule Size in Rice Grains are Affected By Growing Season.
Phyton-International Journal of Experimental Botany, 88(4), 403–412. https://doi.org/10.32604/phyton.2019.07371
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