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Ma Z, Zhu Y, Wang Z, Chen X, Cao J, Liu G, Li G, Wei H, Zhang H. Effect of starch and protein on eating quality of japonica rice in Yangtze River Delta. Int J Biol Macromol 2024; 261:129918. [PMID: 38309388 DOI: 10.1016/j.ijbiomac.2024.129918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/16/2024] [Accepted: 01/31/2024] [Indexed: 02/05/2024]
Abstract
This study examined four types of japonica rice from Yangtze River Delta, categorized based on amylose content (AC) and protein content (PC): high AC with high PC, high AC with low PC, low AC with high PC, and low AC with low PC. It systematically explored the effect of starch, protein and their interactions on eating quality of japonica rice. Rheological analysis revealed that increased amylose, long chains amylopectin or protein levels during cooking strengthen starch-protein interactions (hydrogen bonding), forming a firm gel network. Scanning electron microscopy showed that increased amylose, long chains amylopectin or protein levels made protein and starch more stable in combination during cooking, limiting starch structure cleavage. Therefore, the eating quality of high AC in similar PC japonica rice and high PC in similar AC japonica rice were poor. Further, correlation and random-forest analysis (RFA) identified amylose as the most influential factor in starch-protein interactions affecting rice eating quality, followed by amylopectin and protein. RFA also revealed that in high AC japonica rice, the interactions of Fb3 and albumin with amylose were more conducive to forming good eating quality. In low AC japonica rice, the interactions of Fb2 and prolamin with amylose were more beneficial.
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Affiliation(s)
- Zhongtao Ma
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Ying Zhu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Zhijie Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Xi Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Jiale Cao
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Guodong Liu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Guangyan Li
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
| | - Haiyan Wei
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China.
| | - Hongcheng Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China; Research Institute of Rice Industrial Engineering Technology of Yangzhou University, Yangzhou 225009, China
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Zhu D, Zheng X, Yu J, Chen M, Li M, Shao Y. Effects of Starch Molecular Structure and Physicochemical Properties on Eating Quality of Indica Rice with Similar Apparent Amylose and Protein Contents. Foods 2023; 12:3535. [PMID: 37835188 PMCID: PMC10572605 DOI: 10.3390/foods12193535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/14/2023] [Accepted: 09/18/2023] [Indexed: 10/15/2023] Open
Abstract
It is important to clarify the effects of starch fine structure and protein components on the eating quality of indica rice. In this study, seven indica rice varieties with similar apparent amylose content (AAC) and protein content (PC) but different sensory taste values were selected and compared systematically. It was found that except for AAC and PC, these varieties showed significant differences in starch molecular structure and protein components. Compared with rice varieties with a low sensory taste value, varieties with a higher sensory taste value showed significantly lower amylose and higher amylopectin short chains (degree of polymerization 6-12) content; the protein component showed that the varieties with good taste value had higher albumin and lower globulin and glutelin content (p < 0.05). Rice varieties with lower AC, globulin, and glutelin content, as well as a higher content of albumin and amylopectin short chains, resulted in a higher swelling factor, peak viscosity, breakdown value, and ratio of hardness to stickiness, in which condition cooked rice showed a higher sensory taste value. Moreover, this study indicated that rice varieties with a higher content of albumin and amylopectin short chains were conducive to the good appearance of cooked rice. This study lays the foundation for the taste evaluation of good-tasting indica rice.
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Affiliation(s)
- Dawei Zhu
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs, China National Rice Research Institute, Hangzhou 310006, China; (D.Z.); (X.Z.); (J.Y.); (M.C.)
| | - Xin Zheng
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs, China National Rice Research Institute, Hangzhou 310006, China; (D.Z.); (X.Z.); (J.Y.); (M.C.)
| | - Jing Yu
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs, China National Rice Research Institute, Hangzhou 310006, China; (D.Z.); (X.Z.); (J.Y.); (M.C.)
| | - Mingxue Chen
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs, China National Rice Research Institute, Hangzhou 310006, China; (D.Z.); (X.Z.); (J.Y.); (M.C.)
| | - Min Li
- Rice Research Institute of Guizhou Province, Guiyang 550000, China
| | - Yafang Shao
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs, China National Rice Research Institute, Hangzhou 310006, China; (D.Z.); (X.Z.); (J.Y.); (M.C.)
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Guo X, Wang L, Zhu G, Xu Y, Meng T, Zhang W, Li G, Zhou G. Impacts of Inherent Components and Nitrogen Fertilizer on Eating and Cooking Quality of Rice: A Review. Foods 2023; 12:2495. [PMID: 37444233 DOI: 10.3390/foods12132495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
With the continuous improvement of living standards, the preferences of consumers are shifting to rice varieties with high eating and cooking quality (ECQ). Milled rice is mainly composed of starch, protein, and oil, which constitute the physicochemical basis of rice taste quality. This review summarizes the relationship between rice ECQ and its intrinsic ingredients, and also briefly introduces the effects of nitrogen fertilizer management on rice ECQ. Rice varieties with higher AC usually have more long branches of amylopectin, which leach less when cooking, leading to higher hardness, lower stickinesss, and less panelist preference. High PC impedes starch pasting, and it may be hard for heat and moisture to enter the rice interior, ultimately resulting in worse rice eating quality. Rice with higher lipid content had a brighter luster and better eating quality, and starch lipids in rice have a greater impact on rice eating quality than non-starch lipids. The application of nitrogen fertilizer can enhance rice yield, but it also decreases the ECQ of rice. CRNF has been widely used in cereal crops such as maize, wheat, and rice as a novel, environmentally friendly, and effective fertilizer, and could increase rice quality to a certain extent compared with conventional urea. This review shows a benefit to finding more reasonable nitrogen fertilizer management that can be used to regulate the physical and chemical indicators of rice grains in production and to improve the taste quality of rice without affecting yield.
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Affiliation(s)
- Xiaoqian Guo
- Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China
- China-Sudan Joint Laboratory of Crop Salinity and Drought Stress Physiology, The Ministry of Education of China, Yangzhou 225000, China
| | - Luqi Wang
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Guanglong Zhu
- Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China
| | - Yunji Xu
- Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China
| | - Tianyao Meng
- Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China
| | - Weiyang Zhang
- Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou 225000, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225000, China
| | - Guohui Li
- Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou 225000, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225000, China
| | - Guisheng Zhou
- Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225000, China
- China-Sudan Joint Laboratory of Crop Salinity and Drought Stress Physiology, The Ministry of Education of China, Yangzhou 225000, China
- College for Overseas Education, Yangzhou University, Yangzhou 225000, China
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Dietary Fibre Impacts the Texture of Cooked Whole Grain Rice. Foods 2023; 12:foods12040899. [PMID: 36832977 PMCID: PMC9957187 DOI: 10.3390/foods12040899] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/12/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Consumers' general preference for white rice over whole grain rice stems from the hardness and low palatability of cooked whole grain rice; however, strong links have been found between consuming a large amount of white rice, leading a sedentary lifestyle, and acquiring type 2 diabetes. This led us to formulate a new breeding goal to improve the softness and palatability of whole grain rice while promoting its nutritional value. In this study, the association between dietary fibre profiles (using an enzymatic method combined with high-performance liquid chromatography) and textural properties of whole grain rice (using a texture analyser) was observed. The results showed that a variation in the ratio of soluble dietary fibre (SDF) and insoluble dietary fibre (IDF) influenced the textural characteristics of cooked whole grain rice; found a strong association between SDF to IDF ratio and hardness (r = -0.74, p < 0.01) or gumminess (r = -0.69, p < 0.01) of cooked whole grain rice, and demonstrated that the SDF to IDF ratio was also moderately correlated with cohesiveness (r = -0.45, p < 0.05), chewiness (r = -0.55, p < 0.01), and adhesiveness (r = 0.45, p < 0.05) of cooked whole grain rice. It is suggested that the SDF to IDF ratio can be used as a biomarker for breeding soft and highly palatable whole grain rice of cultivated tropical indica rice to achieve consumer well-being. Lastly, a simple modified method from the alkaline disintegration test was developed for high-throughput screening of dietary fibre profiles in the whole grain indica rice samples.
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Guo J, Qu L, Wang L, Lu W, Lu D. Effects of post-silking drought stress degree on grain yield and quality of waxy maize. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:1530-1540. [PMID: 36194545 DOI: 10.1002/jsfa.12250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 09/26/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Drought stress (DS) induced by post-silking have a major impact on the yield and quality of maize. In this study, the effects of different degrees of DS after pollination on grain filling, starch and protein metabolism, and functional properties were investigated using two waxy maize cultivars as materials. The levels of DS that were investigated were 'mild water stress' (WS1), 'moderate water stressed' (WS2), and 'severe waterstressed' (WS3). RESULTS Drought stress decreased grain fresh weight, dry weight, and moisture content in both cultivars during grain filling, and reduced kernel number, kernel weight, and grain yield at maturity. The effect on grain development and yield formation gradually increased with drought aggravation. The water stress (WS) treatment downregulated the enzymatic activities related to starch biosynthesis during grain-filling process, accompanied by a decrease in soluble sugar and starch deposition. The WS treatment increased the enzymatic activities involved in protein synthesis during grain-filling process, thereby increasing the protein content of grains. On average, WS2 and WS3 treatments reduced the pasting viscosities and increased the gelatinization temperatures of grains, with WS3 having the greatest effect. However, the changes of setback viscosity, gelatinization enthalpy, retrogradation enthalpy, and retrogradation percentage under WS treatment were inconsistent in both cultivars. Pearson correlation analysis showed that starch content was negatively correlated with gelatinization temperatures and positively correlated with pasting viscosities in both cultivars. However, grain pasting and gelatinization properties have opposite correlations with protein content and starch content. CONCLUSIONS These findings suggest that post-silking DS regulated the grain-filling process and starch and protein biosynthesis, which influenced grain yield and quality. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Jian Guo
- Jiangsu Key Laboratory of Crop Genetics and Physiology|Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou, 225009, P.R. China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, 225009, P.R. China
| | - Lingling Qu
- Jiangsu Key Laboratory of Crop Genetics and Physiology|Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou, 225009, P.R. China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, 225009, P.R. China
| | - Longfei Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology|Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou, 225009, P.R. China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, 225009, P.R. China
| | - Weiping Lu
- Jiangsu Key Laboratory of Crop Genetics and Physiology|Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou, 225009, P.R. China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, 225009, P.R. China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, P.R. China
| | - Dalei Lu
- Jiangsu Key Laboratory of Crop Genetics and Physiology|Jiangsu Key Laboratory of Crop Cultivation and Physiology, Yangzhou University, Yangzhou, 225009, P.R. China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, 225009, P.R. China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, P.R. China
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Hou S, Men Y, Wei M, Zhang Y, Li H, Sun Z, Han Y. Total Protein Content, Amino Acid Composition and Eating-Quality Evaluation of Foxtail Millet ( Setaria italica (L.) P. Beauv). Foods 2022; 12:foods12010031. [PMID: 36613247 PMCID: PMC9818070 DOI: 10.3390/foods12010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Foxtail millet has attracted substantial attention in recent years because of its excellent properties as a cereal crop with high nutritional value. Although the cultivation area of foxtail millet keeps growing, the fundamental research into the nutritional and eating qualities of foxtail millet germplasm collections is limited. In this study, we performed a survey of protein content, amino acid composition and eating quality among a germplasm collection of foxtail millet accessions grown in different environments. Our results revealed 21 accessions with stable protein content under different environments. The correlation analysis further revealed that the protein content of the grains was affected by environmental and genotypic interactions. The further amino acid composition analyses suggested that higher protein content accessions have a better essential amino acid index, providing more nutritional value for human beings and animal feedstock. Moreover, the flavor-related amino acid content and other eating-quality trait analyses were also performed. The subordinative analysis suggested that B331 could be the best accession with high protein content and superior eating quality. Taken together, this study provides essential nutritional and eating-quality data on our germplasm collection of foxtail millets, and provides a core genetic resource from which to breed elite foxtail millet varieties in the future.
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Affiliation(s)
- Siyu Hou
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
- Shanxi Key Laboratory of Minor Crops Germplasm Innovation and Molecular Breeding, Taiyuan 030031, China
| | - Yihan Men
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
| | - Min Wei
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
| | - Yijuan Zhang
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
- Shanxi Key Laboratory of Minor Crops Germplasm Innovation and Molecular Breeding, Taiyuan 030031, China
| | - Hongying Li
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
- Shanxi Key Laboratory of Minor Crops Germplasm Innovation and Molecular Breeding, Taiyuan 030031, China
| | - Zhaoxia Sun
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
- Shanxi Key Laboratory of Minor Crops Germplasm Innovation and Molecular Breeding, Taiyuan 030031, China
- Correspondence: ; Tel.: +86-18636071356
| | - Yuanhuai Han
- College of Agriculture, Institute of Agricultural Bioengineering, Shanxi Agricultural University, Jinzhong 030801, China
- Shanxi Key Laboratory of Minor Crops Germplasm Innovation and Molecular Breeding, Taiyuan 030031, China
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Peng L, Lu H, Chen J, Wu Z, Xiao Z, Qing X, Song J, Wang Z, Zhao J. Characteristics of Seed Vigor in Rice Varieties with Different Globulin Accumulations. Int J Mol Sci 2022; 23:ijms23179717. [PMID: 36077115 PMCID: PMC9456403 DOI: 10.3390/ijms23179717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Seed vigor of rice is an important trait for direct seeding. The objective of this study was to reveal the relationship between globulin and seed vigor, and then to explore a method for evaluating seed vigor. Several rice varieties with different levels of 52 kDa globulin accumulation were used to compare seed vigor under normal and aged conditions. Results showed that varieties with high globulin accumulation obtained significantly higher seed vigor, measured by germination percentage and germination index, compared with those varieties with low globulin accumulation under normal and aged conditions. Meanwhile, a significantly higher accumulation of reactive oxygen species (ROS) was observed in the early germinating seeds of varieties with high globulin accumulation compared to those varieties with low globulin accumulation under normal and aged conditions. Collectively, the globulin content could be applied in the evaluation of seed vigor, which contributes to the selection of rice varieties for direct seeding.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jia Zhao
- Correspondence: (Z.W.); or (J.Z.)
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Development of Certified Reference Materials for the Determination of Apparent Amylose Content in Rice. Molecules 2022; 27:molecules27144647. [PMID: 35889518 PMCID: PMC9322866 DOI: 10.3390/molecules27144647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 11/16/2022] Open
Abstract
Apparent amylose content (AAC) is one of the most important parameters in rice quality evaluation. In this study, four rice reference materials used to test rice AAC were developed. The AAC of rice reference materials were measured by a spectrophotometric method with a defatting procedure, calibrated from potato amylose and waxy rice amylopectin at the absorption wavelengths of 620 and 720 nm. Homogeneity test (n = 20) was judged by F-test based on the mean squares of among and within bottles, and short- and long-term stability monitoring was performed by T-test to check if there was significant degradation at the delivery temperature of under 40 °C (14 days) and at 0–4 °C storage condition (18 months), respectively. After joint evaluation by ten laboratories, Dixion and Cochran statistical analyses were presented. The expanded uncertainties were calculated based on the uncertainty of homogeneity, short- and long-term stability, and inter-laboratory validation containing factor k = 2. It found that the four reference materials were homogenous and stable, and had the AAC (g/100 g, k = 2) of 2.96 ± 1.01, 10.68 ± 0.66, 17.18 ± 1.04, and 16.09 ± 1.29, respectively, at 620 nm, and 1.46 ± 0.49, 10.44 ± 0.56, 16.82 ± 0.75, and 24.33 ± 0.52, respectively, at 720 nm. It was indicated that 720 nm was more suitable for the determination of rice AAC with lower uncertainties. The determinations of the AAC of 11 rice varieties were carried out by two methods, the method without defatting and with calibration from the four rice reference materials and the method with a defatting procedure and calibrating from potato amylose and waxy rice amylopectin. It confirmed that the undefatted rice reference materials could achieve satisfactory results to test the rice samples with the AAC ranging from 1 to 25 g/100 g. It would greatly reduce the time cost and improve testing efficiency and applicability, and provide technical support for the high-quality development of the rice industry.
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In vitro testing indicates an accelerated rate of digestion of starch into glucose of cooked rice with the development of low amylose rice in China. Food Chem X 2022; 14:100278. [PMID: 35284817 PMCID: PMC8914537 DOI: 10.1016/j.fochx.2022.100278] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 01/24/2022] [Accepted: 03/04/2022] [Indexed: 01/19/2023] Open
Abstract
The consumption of low amylose rice has substantially increased in China. In vitro starch digestion properties were evaluated in low amylose rice of China. The rate of digestion of starch into glucose was accelerated in low amylose rice. In vivo assessment of the diabetes risk with consuming low amylose rice is needed.
The consumption of low amylose rice has substantially increased in China in recent years. This in vitro study showed that the starch digestion process was distinctly different between a group of commercial rice samples (CR, n = 34) with low amylose content (14–20%) and a group of control rice samples (CK, n = 16) with high amylose content (24–30%). In particular, the CR group had an active digestion duration that was ∼ 90% shorter and a rate of glucose production within the active digestion duration that was nearly 50% higher compared to the CK group. The findings of this study indicate that the development of low amylose rice in China can result in an acceleration in the rate of digestion of starch into glucose of cooked rice, highlighting the need for in vivo assessment of the potential risk of diabetes associated with the consumption of low amylose rice.
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10
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Zhao Y, Henry RJ, Gilbert RG. Testing the Linearity Assumption for Starch Structure-Property Relationships in Rices. Front Nutr 2022; 9:916751. [PMID: 35677552 PMCID: PMC9168890 DOI: 10.3389/fnut.2022.916751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/02/2022] [Indexed: 11/28/2022] Open
Abstract
Many properties of starch-containing foods are significantly statistically correlated with various structural parameters. The significance of a correlation is judged by the p-value, and this evaluation is based on the assumption of linear relationships between structural parameters and properties. We here examined the linearity assumption to see if it can be used to predict properties at conditions that are not close to those under which they were measured. For this we used both common domesticated rices (DRs) and Australian wild rices (AWRs), the latter having significantly different structural parameters and properties compared to DRs. The results showed that (1) the properties were controlled by more than just the amylopectin or amylose chain-length distributions or amylose content, other structural features also being important, (2) the linear model can predict the enthalpy ΔHg of both AWRs and DRs from the structural parameters to some extent but is often not accurate; it can predict the ΔHg of indica rices with acceptable accuracy from the chain length distribution and the amount of longer amylose chains (degree of polymerization > 500), and (3) the linear model can predict the stickiness of both AWRs and DRs to acceptable accuracy in terms of the amount of longer amylose chains. Thus, the commonly used linearity assumption for structure-property correlations needs to be regarded circumspectly if also used for quantitative prediction.
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Affiliation(s)
- Yingting Zhao
- Centre for Nutrition and Food Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
- Jiangsu Key Laboratory of Crop Genetics and Physiology/State Key Laboratory of Hybrid Rice, College of Agriculture, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
| | - Robert J. Henry
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Robert G. Gilbert
- Centre for Nutrition and Food Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
- Jiangsu Key Laboratory of Crop Genetics and Physiology/State Key Laboratory of Hybrid Rice, College of Agriculture, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
- *Correspondence: Robert G. Gilbert
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11
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Hu X, Zhang W, Lu L, Shao Y, Chen M, Zhu Z, Mou R. Comparison of quality of appearance, cooking quality, and protein content of green‐labeled rice and conventional rice. Cereal Chem 2022. [DOI: 10.1002/cche.10543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xianqiao Hu
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Weixing Zhang
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Lin Lu
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Yafang Shao
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Mingxue Chen
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Zhiwei Zhu
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
| | - Renxiang Mou
- Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture and Rural Affairs China National Rice Research Institute Hangzhou China
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12
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Jarma Arroyo SE, Siebenmorgen TJ, Seo HS. Effects of Thickness Fraction Process on Physicochemical Properties, Cooking Qualities, and Sensory Characteristics of Long-Grain Rice Samples. Foods 2022; 11:foods11020222. [PMID: 35053955 PMCID: PMC8775037 DOI: 10.3390/foods11020222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 11/16/2022] Open
Abstract
A process of removing thinner kernels of rough rice, i.e., thickness fraction process, has been suggested as a method for increasing milling yields in the rice industry. This study aimed at determining whether physicochemical properties, cooking qualities, and sensory characteristics of rice samples could be changed by the addition of a thickness fraction into the rice process stream. Each of four long-grain rice cultivar lots was assigned into two groups: unfractionated and thickness-fractionated. For the thickness-fractionated group, thin rice kernels (<1.9 mm) of rough rice were discarded from unfractionated rice samples. Unfractionated and thickness-fractionated rice samples were compared with respect to physicochemical properties, cooking qualities, and sensory characteristics. The results showed that the removal of such thin kernels decreased the breakage and chalkiness rates and increased head rice yields. Fractionated rice samples exhibited lower amylose contents and crude protein contents but higher gelatinization temperatures than unfractionated rice samples. While the optimum cooking duration and width–expansion ratios of thickness-fractionated rice samples were higher than those of unfractionated ones, there was a negligible impact of the thickness fraction process on sensory characteristics of long-grain rice samples. In conclusion, the thickness fraction process affects physicochemical properties and cooking qualities more than the sensory characteristics of rice samples.
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13
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Huang M, Li X, Hu L, Xiao Z, Chen J, Cao F. Comparing texture and digestion properties between white and brown rice of indica cultivars preferred by Chinese consumers. Sci Rep 2021; 11:19054. [PMID: 34561529 PMCID: PMC8463671 DOI: 10.1038/s41598-021-98681-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/13/2021] [Indexed: 11/09/2022] Open
Abstract
The consumption of good tasting rice, mainly soft-textured white rice with low amylose content, has substantially increased in China as living standards improve. However, this diet change may increase the risk of developing type II diabetes because the soft-textured white rice is generally less resistant to digestion and has a higher glycemic index. In contrast, intake of brown rice is inversely associated with type II diabetes risk. This study was conducted to test the possibility that brown rice processed from soft-textured cultivars has both acceptable texture and improved health benefits. Texture and digestion properties were compared between white and brown rice of five indica cultivars preferred by Chinese consumers. Mean hardness was 33% higher while mean springiness was 5% lower for cooked brown rice than for cooked white rice. As compared to cooked white rice, cooked brown rice had a 41% longer mean active digestion duration but 31% lower mean glucose production rate and 11% lower mean total glucose production from starch digestion. However, the differences in texture and starch digestion properties between cooked brown and white rice were affected by cultivar identity. Brown rice processed from suitable cultivars with both a relatively thinner bran layer and relatively higher grain amylose content met consumer requirements in terms of acceptable texture and improved health benefits.
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Affiliation(s)
- Min Huang
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China.
| | - Xing Li
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Liqin Hu
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Zhengwu Xiao
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Jiana Chen
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Fangbo Cao
- Crop and Environment Research Center for Human Health, Key Laboratory of Ministry of Education for Crop Physiology and Molecular Biology, Hunan Agricultural University, Changsha, 410128, China
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14
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Wang X, Wang K, Yin T, Zhao Y, Liu W, Shen Y, Ding Y, Tang S. Nitrogen Fertilizer Regulated Grain Storage Protein Synthesis and Reduced Chalkiness of Rice Under Actual Field Warming. FRONTIERS IN PLANT SCIENCE 2021; 12:715436. [PMID: 34527011 PMCID: PMC8435852 DOI: 10.3389/fpls.2021.715436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/05/2021] [Indexed: 06/02/2023]
Abstract
Our previous study has shown that nitrogen plays an important role in dealing with significantly increased chalkiness caused by elevated temperature. However, the role of nitrogen metabolites has not been given sufficient attention, and its regulatory mechanism is not clear. This study investigated the effects of high temperature and nitrogen fertilizer on the synthesis of grain storage protein and further explored the quality mechanism under the actual scenario of field warming. Results showed that increased temperature and nitrogen fertilizer could affect the activities of nitrogen metabolism enzymes, namely, glutamate synthetase, glutamine synthetase, glutamic pyruvic transaminase, and glutamic oxaloacetic transaminase, and the expressions of storage protein synthesis factor genes, namely, GluA and GluB, and subfamily genes, namely, pro14, BiP1, and PDIL1, which co-induced the changes of storage protein synthesis in rice grains. Furthermore, the increased temperature changed the balance of grain storage substances which may lead to the significantly increased chalky rate (197.67%) and chalkiness (532.92%). Moreover, there was a significant negative correlation between prolamin content and chalkiness, indicating that nitrogen fertilizer might regulate the formation of chalkiness by affecting the synthesis of prolamin. Results suggested that nitrogen application could regulate the related core factors involved in nitrogen metabolism pathways, which, in turn, affects the changes in the storage protein components in the grain and further affects quality. Therefore, as a conventional cultivation measure, nitrogen application would have a certain value in future rice production in response to climate warming.
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Affiliation(s)
- Xueqin Wang
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Kailu Wang
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Tongyang Yin
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Yufei Zhao
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Wenzhe Liu
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Yingying Shen
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
| | - Yanfeng Ding
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
- Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China
| | - She Tang
- College of Agronomy, Nanjing Agricultural University, Nanjing, China
- Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China
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