scholarly journals Effects of dynamic low temperature during the grain filling stage on starch morphological structure, physicochemical properties, and eating quality of soft japonica rice

2020 ◽  
Vol 97 (2) ◽  
pp. 540-550 ◽  
Author(s):  
Yajie Hu ◽  
Luan Li ◽  
Jinyu Tian ◽  
Chengxin Zhang ◽  
Jie Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Physicochemical Properties ◽  
Morphological Structure ◽  
Grain Filling ◽  
Eating Quality ◽  
Japonica Rice ◽  
Filling Stage ◽  
Grain Filling Stage

Effect of Temperature during Grain Filling Stage on Endosperm Structure and Apperance Quality of Aromatic Rice

2012 ◽  
Vol 460 ◽  
pp. 286-289 ◽  
Author(s):  
Zhen Jiang Xu ◽  
Li Zhong Xiao ◽  
Hong Liu ◽  
Yong Hao Ren ◽  
Zhi Lin Li
Keyword(s):  
Grain Filling ◽  
Effect Of Temperature ◽  
Rice Grain ◽  
Aromatic Rice ◽  
Starch Granules ◽  
Filling Stage ◽  
Appearance Quality ◽  
Endosperm Structure ◽  
Grain Filling Stage

Based on the experiment of two inbred aromatic rice varieties and one hybrid aromatic rice line treated under four different temperatures( daymean temperature 21°C, 23°C, 26°C and 30°C respectively) during grain filling stage in phytotrons, the shape and arrangement of endosperm starch granules in rice grain transection were observed by scanning electron microscope and the related characteristics of rice grain qualities of chalky percent and chalkiness were analyzed at the same time. The results showed that under the lower temperature( daymean temperature21°C and 23°C), many large compound starch granules with clear angulars packed together regularly without significant natural gaps bewteen starch granules in the tansectional endosperm. However, with the increase of temperature, starch granules in the transectional endosperm were changed from regularly shaped and closely and orderly arranged to various shaped and chaoticly arranged with obvious natural gaps between starch granules, which was closely consistent with the poorer appearance quality under the higher temperature, which indicated that the endosperm structure is closely related with appearance quality of aromatic rice.

Nitrogen effect on amino acid composition in leaf and grain of japonica rice during grain filling stage

2015 ◽  
Vol 64 ◽  
pp. 29-33 ◽  
Author(s):  
Yanling Zhao ◽  
Min Xi ◽  
Xincheng Zhang ◽  
Zhaomiao Lin ◽  
Chengqiang Ding ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Grain Filling ◽  
Japonica Rice ◽  
Filling Stage ◽  
Nitrogen Effect ◽  
Grain Filling Stage

scholarly journals Dissecting the meteorological and genetic factors affecting rice grain quality in Northeast China

2021 ◽  
Author(s):  
Mojun Chen ◽  
Zhao Li ◽  
Jie Huang ◽  
Yongfeng Yan ◽  
Tao Wu ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Air Temperature ◽  
Northeast China ◽  
Grain Quality ◽  
Meteorological Factors ◽  
Grain Filling ◽  
Rice Grain ◽  
Filling Stage ◽  
Grain Filling Stage

Abstract Background The Northeast Plain of China, which is an important region for the production of high grain quality rice in China. However, the grain quality of the rice produced varies across this region, even for the same cultivar. Objective In order to explore the meteorological factors that have the greatest influence on quality and the transcriptional level differences between different cultivars and different locations at grain filling stage. Methods We grew eight rice cultivars in three locations in Northeast China during two growing seasons (2017 and 2018). We recorded meteorological conditions, including air temperature, air temperature range, and photosynthetically active radiation (PAR) during the grain-filling stage of each cultivar, and analyzed the grain quality of those eight cultivars. Results Across all eight cultivars, meteorological factors had a stronger effect on eating quality than genotype, while genotype had a stronger effect on milling quality. Of the three environmental factors assessed, PAR was significantly correlated with the most grain quality traits. Using RNA-sequencing analysis, we identified 573 environment-specific DEGs (Differentially Expressed Genes), and 119 genotype-specific DEGs; 11 DEGs were responsive to genotype × environment interactions. These DEGs were involved in many key metabolic processes. Conclusion Our results indicated that interactions among environmental factors, especially PAR, affected rice quality in Northeast China. Further analyses of the DEGs identified herein may provide useful information for future breeding programs aiming to develop high grain quality rice varieties suitable for cultivation across Northeast China.

scholarly journals Dissecting of the Deterioration in Eating Quality for Erect Panicle (Ep) Type High Yield Japonica Super Rice in Northest China

2021 ◽  
Author(s):  
Sibo Chen ◽  
Shuangjie Chen ◽  
Yihui Jiang ◽  
Qing Lu ◽  
Zhongyuan Liu ◽  
...  
Keyword(s):  
Grain Filling ◽  
Pleiotropic Effect ◽  
High Yield ◽  
Eating Quality ◽  
Grain Protein ◽  
Protein Accumulation ◽  
Filling Stage ◽  
Key Factor ◽  
Use Efficiency ◽  
Grain Filling Stage

Abstract Ep type is an important morphological improvement (following dwarf breeding and ideal plant type) to adapt to super high yield breeding of rice, which shows a pleiotropic effect in increasing grain yield and nitrogen use efficiency (NUE) in rice. Nevertheless, it remains unclear whether Ep has adverse effects on eating quality and its regulatory of increasing nitrogen uptake and assimilation. In this study, we developed a pair of near-isogenic lines (NILs) of dep1 (NIL-Ep, NIL-Non Ep) in the Liaogeng 5 (LG5) and Akihikari (AKI) backgrounds. Here, we report that rice plants NIL-Ep have more grain numbers per panicle in middle to bottom spike positions than plants NIL-non Ep. This part of increased grain not only is the key factor to increase the yield, but also is the reason to reduce the eating quality. The content of prolamin and glutelin in the grain increased significantly, which resulted in higher hardness and worse viscosity of rice after cooking. Additionally, the activity of several essential enzymes catalyzing nitrogen metabolism is higher in the NIL-Ep line than in NIL-non Ep line, especially from the mid to late grain filling stage. Based on these results, we conclude that Ep positively regulates grain protein accumulation primarily through enhance the activity of enzyme enroll nitrogen assimilation and redistribution during the mid to late grain-filling stage, resulting in excessive accumulation of grain protein and decreased the quality of eating.

Effect of light intensity on grain quality of rice at different spike positions during grain-filling stage

2013 ◽  
Vol 21 (2) ◽  
pp. 164
Author(s):  
MingHui DONG ◽  
Feng HUI ◽  
JunRong GU ◽  
PeiFeng CHEN ◽  
DaiFeng YANG ◽  
...  
Keyword(s):  
Light Intensity ◽  
Grain Quality ◽  
Grain Filling ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
Effect Of Light

Effects of Nitrogen Amount on Yield and Nutrient Absorption of Cold Land Japonica Rice under the Condition of Straw Returning

2015 ◽  
Vol 737 ◽  
pp. 325-331
Author(s):  
Qi Wang ◽  
Shu Wang
Keyword(s):  
Rice Variety ◽  
Grain Filling ◽  
Nutrient Absorption ◽  
Maturity Stage ◽  
Japonica Rice ◽  
N Accumulation ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
1000 Grain Weight ◽  
Heading Stage

Effects of nitrogen amount on yield and nutrient absorption of cold land japonica rice under the condition of straw returning were studied using cold land rice variety Dong Nong 428 as experimental material. The results showed as follows: yields and effective spikes increased first then reduced, and the highest yield and effective panicles per plant was 7983.33 kg·hm-2 and 17.7 per plant that was found in treatment with nitrogen amount was 133 kg/hm2; differences of plant N, P and K accumulation of each treatment in tillering stage were not obvious and showed single peak curve change in heading stage while took on obvious increasing trend in grain filling stage and maturity stage. The straw returning increased effective spikes while had no effects on yield, spike weight, total shriveled rate and 1000-grain weight; the straw returning also had no effects on N, P and K accumulation in tillering and heading stage while it inhibit N, P and K accumulation in grain filling stage, and it inhibited N accumulation while promoted P and K accumulation in maturity stage.

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