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Amankwaah VA, Williamson S, Olukolu BA, Truong VD, Carey E, Ssali R, Yencho GC. Interrelations of α- and β-amylase activity with starch, sugars, and culinary and nutritional quality attributes in sweetpotato storage roots. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:4662-4670. [PMID: 37406153 DOI: 10.1002/jsfa.12832] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND Little information is available on α- and β-amylase activity and their associations with starch, sugars and other culinary qualities in sweetpotato. The present study aimed to assess sweetpotato storage root α- and β-amylase activity in relation to starch, sugars, β-carotene content and storage root flesh color. RESULTS α- and β-amylase activity (α-AA and β-AA) were assayed from a Tanzania (T) × Beauregard (B) genetic mapping population in their uncured (raw), cured and stored (approximately 11 weeks) forms during 2016 and 2017. Ceralpha and Betamyl methods, with modifications to suit a high-throughput microplate assay format, were used to quantify α-AA and β-AA, respectively. Storage root dry matter, starch, glucose, fructose, sucrose and β-carotene content were predicted using near infrared reflectance spectroscopy. There was little relationship (r2 = 0.02-0.08, P ≤ 0.05 in 2016 and r2 = 0.05-0.11, P ≤ 0.05 in 2017) between α-AA and β-AA. We observed negative linear associations between α-AA and dry matter content and generally no correlations between β-AA and dry matter content. β-AA and sugars were weakly positively correlated. β-AA and β-carotene content were positively correlated (r = 0.3-0.4 in 2016 and 0.3-0.5 in 2017). CONCLUSION Generally, the correlation coefficient for amylase enzyme activity and sugar components of storage roots at harvest increased after curing and during post-harvest storage. The present study is a major step forward in sweetpotato breeding in terms of providing a better understanding of how α- and β-amylase activity are inter-associated with several culinary quality attributes. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Victor A Amankwaah
- CSIR - Crops Research Institute, Kumasi, Ghana
- Department of Horticultural Science, NC State University, Raleigh, NC, USA
| | - Sharon Williamson
- Department of Horticultural Science, NC State University, Raleigh, NC, USA
| | | | - Van-Den Truong
- USDA-ARS, Food Science Research Unit, NC State University, Raleigh, NC, USA
| | - Edward Carey
- Reputed Agric4Dev Stichting and Foundation; Formerly Working for International Potato Center (CIP), Kumasi, Ghana
| | - Reuben Ssali
- International Potato Center (CIP), Kampala, Uganda
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Li C, Kou M, Song W, Arisha MH, Gao R, Tang W, Yan H, Wang X, Zhang Y, Li Q. Comparative Analysis of Saccharification Characteristics of Different Type Sweetpotato Cultivars. Foods 2023; 12:3785. [PMID: 37893678 PMCID: PMC10606501 DOI: 10.3390/foods12203785] [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: 08/27/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
As an important characteristic crop in China, sweetpotato plays an important role in the intake and supplement of nutrients. The saccharification characteristics of sweetpotato determine the edible quality and processing type. Exploring the saccharification characteristics of sweetpotato is of great significance to the selection of processing materials and the formation mechanism of service quality, but there are few relevant studies. A comparison study of two high saccharification varieties (Y25 and Z13) and one low saccharification variety (X27) was conducted to analyze their storage roots physical and chemical properties. The results show that the dry matter content, starch, and amylose content of Y25 and Z13 were significantly different from those of X27. Furthermore, the total amylase activity was significantly higher than that of X27. On the other hand, the starch gelatinization temperature was significantly lower than that of X27. The starch reduction in Y25 and Z13 is four times more than that in X27, and the maltose content of Y25 and Z13 is more than two times that of X27. Finally, the scores of sensory evaluation and physiological sweetness were significantly higher than those of X27. The results provide a theoretical basis for understanding the saccharification characteristics of sweetpotato varieties and are of guiding significance for the selection of sweetpotato parents.
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Affiliation(s)
- Chen Li
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Meng Kou
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Weihan Song
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Mohamed Hamed Arisha
- Department of Horticulture, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
| | - Runfei Gao
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Wei Tang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Hui Yan
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Xin Wang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Yungang Zhang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
| | - Qiang Li
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (C.L.); (M.K.); (W.S.); (R.G.); (W.T.); (H.Y.); (X.W.); (Y.Z.)
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3
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Li C, Kou M, Arisha MH, Tang W, Ma M, Yan H, Wang X, Wang X, Zhang Y, Liu Y, Gao R, Li Q. Transcriptomic and Metabolic Profiling of High-Temperature Treated Storage Roots Reveals the Mechanism of Saccharification in Sweetpotato ( Ipomoea batatas (L.) Lam.). Int J Mol Sci 2021; 22:ijms22136641. [PMID: 34206151 PMCID: PMC8267658 DOI: 10.3390/ijms22136641] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 12/13/2022] Open
Abstract
The saccharification of sweetpotato storage roots is a common phenomenon in the cooking process, which determines the edible quality of table use sweetpotato. In the present study, two high saccharified sweetpotato cultivars (Y25, Z13) and one low saccharified cultivar (X27) in two growth periods (S1, S2) were selected as materials to reveal the molecular mechanism of sweetpotato saccharification treated at high temperature by transcriptome sequencing and non-targeted metabolome determination. The results showed that the comprehensive taste score, sweetness, maltose content and starch change of X27 after steaming were significantly lower than those of Y25 and Z13. Through transcriptome sequencing analysis, 1918 and 1520 differentially expressed genes were obtained in the two periods of S1 and S2, respectively. Some saccharification-related transcription factors including MYB families, WRKY families, bHLH families and inhibitors were screened. Metabolic analysis showed that 162 differentially abundant metabolites related to carbohydrate metabolism were significantly enriched in starch and sucrose capitalization pathways. The correlation analysis between transcriptome and metabolome confirmed that the starch and sucrose metabolic pathways were significantly co-annotated, indicating that it is a vitally important metabolic pathway in the process of sweetpotato saccharification. The data obtained in this study can provide valuable resources for follow-up research on sweetpotato saccharification and will provide new insights and theoretical basis for table use sweetpotato breeding in the future.
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Affiliation(s)
- Chen Li
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China; (C.L.); (W.T.); (M.M.); (H.Y.); (X.W.)
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Meng Kou
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Mohamed Hamed Arisha
- Department of Horticulture, Faculty of Agriculture, Zagazig University, Zagazig, Sharkia 44511, Egypt;
| | - Wei Tang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China; (C.L.); (W.T.); (M.M.); (H.Y.); (X.W.)
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Meng Ma
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China; (C.L.); (W.T.); (M.M.); (H.Y.); (X.W.)
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Hui Yan
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China; (C.L.); (W.T.); (M.M.); (H.Y.); (X.W.)
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Xin Wang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Xiaoxiao Wang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China; (C.L.); (W.T.); (M.M.); (H.Y.); (X.W.)
| | - Yungang Zhang
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Yaju Liu
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Runfei Gao
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
| | - Qiang Li
- Xuzhou Institute of Agricultural Sciences in Jiangsu Xuhuai District/Key Laboratory of Biology and Genetic Breeding of Sweetpotato, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, China; (M.K.); (X.W.); (Y.Z.); (Y.L.); (R.G.)
- Correspondence:
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4
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Nakamura Y. Carbohydrate Components Associated with Sweetness of Cooked Storage Roots of Sweet Potato Cultivars. J JPN SOC FOOD SCI 2020. [DOI: 10.3136/nskkk.67.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Akrimi R, Hajlaoui H, Rizzo V, Muratore G, Mhamdi M. Agronomical traits, phenolic compounds and antioxidant activity in raw and cooked potato tubers growing under saline conditions. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:3719-3728. [PMID: 32248537 DOI: 10.1002/jsfa.10411] [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: 11/04/2019] [Revised: 03/29/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Potato yields and tuber compositions are linked to mechanisms adopted by plants to cope with salinity and often can change after cooking. The current study aimed to evaluate the effects of salinity, variety and cooking method in the composition of potato tubers. Three potato varieties (Spunta, Bellini and Alaska) grown under distinct salt levels (T1: 2.2 ms cm-1 EC, T2: 8.5 ms cm-1 EC before electromagnetic treatment and 6.3 ms cm-1 EC after electromagnetic treatment, T3: 8.5 ms cm-1 EC) were studied. Yield and tuber quality attributes (starch, dry matter, specific density and tuber size) were evaluated. Carotenoids, total and individual phenolics determined by high-performance liquid chromatography (HPLC), relative antioxidant capacity (RAC) and ions content were analyzed, in both raw and water boiled tubers. RESULTS Tuber yield, starch, dry matter, ions and antioxidants were significantly influenced by the salinity level and variety. The least production and the highest antioxidants were obtained under T3. Antioxidants were influenced by cooking method, the interactions treatment × cooking method and variety × cooking method. Individual phenolic compounds exhibited different response to cooking as quercetin, caffeic acid and catechin decreased significantly after boiling. However, coumaric acid increased in Alaska tubers. CONCLUSION Salinity level, variety and cooking method are important determinants of tuber yield and composition. Electromagnetic water may be useful to enhance potato production and tuber quality in areas suffering from water salinization. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Rawaa Akrimi
- Higher Institute of Biotechnology of Monastir, Monastir, Tunisia
| | - Hichem Hajlaoui
- Regional Center of Agricultural Research, Sidi Bouzid, Tunisia
| | - Valeria Rizzo
- Di3A - Department of Agriculture, Food and Environment, University of Catania, Catania, Italy
| | - Giuseppe Muratore
- Di3A - Department of Agriculture, Food and Environment, University of Catania, Catania, Italy
| | - Mahmoud Mhamdi
- Higher Institute of Agronomy of Chott Mariem, Chott Mariem, Tunisia
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6
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Garg M, Sharma N, Sharma S, Kapoor P, Kumar A, Chunduri V, Arora P. Biofortified Crops Generated by Breeding, Agronomy, and Transgenic Approaches Are Improving Lives of Millions of People around the World. Front Nutr 2018; 5:12. [PMID: 29492405 PMCID: PMC5817065 DOI: 10.3389/fnut.2018.00012] [Citation(s) in RCA: 168] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/29/2018] [Indexed: 11/21/2022] Open
Abstract
Biofortification is an upcoming, promising, cost-effective, and sustainable technique of delivering micronutrients to a population that has limited access to diverse diets and other micronutrient interventions. Unfortunately, major food crops are poor sources of micronutrients required for normal human growth. The manuscript deals in all aspects of crop biofortification which includes-breeding, agronomy, and genetic modification. It tries to summarize all the biofortification research that has been conducted on different crops. Success stories of biofortification include lysine and tryptophan rich quality protein maize (World food prize 2000), Vitamin A rich orange sweet potato (World food prize 2016); generated by crop breeding, oleic acid, and stearidonic acid soybean enrichment; through genetic transformation and selenium, iodine, and zinc supplementation. The biofortified food crops, especially cereals, legumes, vegetables, and fruits, are providing sufficient levels of micronutrients to targeted populations. Although a greater emphasis is being laid on transgenic research, the success rate and acceptability of breeding is much higher. Besides the challenges biofortified crops hold a bright future to address the malnutrition challenge.
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Affiliation(s)
- Monika Garg
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Natasha Sharma
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Saloni Sharma
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Payal Kapoor
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Aman Kumar
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | | | - Priya Arora
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
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7
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Aoki N. Sweet Potato Flour Decreases Firmness of Gluten-free Rice Bread. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2018. [DOI: 10.3136/fstr.24.105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Noriaki Aoki
- Crop Development and Agribusiness Research Division, Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization
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8
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Wei S, Lu G, Cao H. Effects of cooking methods on starch and sugar composition of sweetpotato storage roots. PLoS One 2017; 12:e0182604. [PMID: 28827808 PMCID: PMC5565179 DOI: 10.1371/journal.pone.0182604] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 07/23/2017] [Indexed: 11/19/2022] Open
Abstract
Sweetpotato has rich nutrition, good ecological adaptability and high yield. There is a lack of knowledge about the effects of cooking methods on starch and sugar components in elite Chinese cultivars. In this study, sweetpotato storage roots from four cultivars "Xinxiang", "Jinyu", "Zimei" and "Yuzishu 263" were treated by baking, boiling and steaming and subsequently analyzed for starch content, amylase activity and sugar contents including glucose, fructose, sucrose and maltose. Results indicated that cooking reduced starch content and final amylase activity and increased reducing sugar content especially maltose content, but did not have significant influence on non-reducing sugar content. These effects were different among the four cultivars and three cooking methods. Baking led to the least starch reduction. Storage roots of "Jinyu" contained the highest amount of sugar content and thus sweetest. Sugar composition analysis suggested that cultivars "Xinxiang" and "Jinyu" belong to high-maltose cultivars. This study may provide useful information for evaluating the cooking quality of sweetpotato cultivars.
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Affiliation(s)
- Shuying Wei
- College of Agriculture & Food Science and The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
| | - Guoquan Lu
- College of Agriculture & Food Science and The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, Zhejiang A & F University, Lin'an, Zhejiang, China
- * E-mail: (HC); (GL)
| | - Heping Cao
- U.S. Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, Commodity Utilization Research Unit, New Orleans, Louisiana, United States of America
- * E-mail: (HC); (GL)
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Lebot V. Rapid quantitative determination of maltose and total sugars in sweet potato ( Ipomoea batatas L. [Lam.]) varieties using HPTLC. Journal of Food Science and Technology 2017; 54:718-726. [PMID: 28298685 DOI: 10.1007/s13197-017-2510-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/18/2016] [Accepted: 01/25/2017] [Indexed: 10/20/2022]
Abstract
When a raw sweet potato root is analysed, only sucrose, glucose and fructose are present but during cooking, starch is hydrolysed into maltose giving the sweet flavour to cooked roots. This study aimed at developing an HPTLC protocol for the rapid quantitative determination of maltose and total sugars in four commercial varieties and to compare them to 243 hybrids grouped by flesh colour (white, orange, purple). In commercial varieties, mean maltose content varied from 10.26 to 15.60% and total sugars from 17.83 to 27.77% on fresh weight basis. Hybrids showed significant variation in maltose content within each group, with means ranging from 7.65% for white-fleshed, to 8.53% in orange- and 11.98% in purple-fleshed. Total mean sugars content was 20.24, 22.11 and 26.84% respectively for white, orange and purple flesh hybrids. No significant correlations were detected between individual sugars but maltose and total sugars content were highly correlated. Compared to the best commercial variety (Baby), 25 hybrids (10.3%) presented a higher maltose content and 40 (16.5%) showed a higher total sugars content. HPTLC was observed as an attractive, cost efficient, high-throughput technique for quantitating maltose and total sugars in sweet potatoes. Perspectives for improving sweet potato quality for consumers' requirements are also discussed.
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Affiliation(s)
- Vincent Lebot
- UMR AGAP, CIRAD-BIOS, P.O. Box 946, Port-Vila, Vanuatu
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10
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Katayama K, Kobayashi A, Sakai T, Kuranouchi T, Kai Y. Recent progress in sweetpotato breeding and cultivars for diverse applications in Japan. BREEDING SCIENCE 2017; 67:3-14. [PMID: 28465663 PMCID: PMC5407919 DOI: 10.1270/jsbbs.16129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 12/19/2016] [Indexed: 05/07/2023]
Abstract
Sweetpotato (Ipomoea batatas (L.) Lam.) is an outcrossing hexaploid that is cultivated in the tropics and warm-temperate regions of the world. Sweetpotato has played an important role as a famine-relief crop during its long history and has recently been reevaluated as a health-promoting food. In Japan, sweetpotato is used for a wide range of applications, such as table use, processed foods, and alcohol and starch production, and two groups at National Agriculture Research Organization (NARO) undertake the breeding of cultivars for these applications. Sweetpotato breeders utilize breeding processes such as grafting for flower induction and the identification of incompatibility groups before crossing to conquer problems peculiar to sweetpotato. For table use, new cultivars with high sugar content were released recently and have become popular among Japanese consumers. New cultivars with high anthocyanin or β-carotene content were released for processed foods and use as colorants. As raw materials, new cultivars with high alcohol yield were released for the production of shochu spirits. In addition, new cultivars with high starch yield and a cultivar containing starch with excellent cold-storage ability were released for starch production. This review deals with recent progress in sweetpotato breeding and cultivars for diverse applications in Japan.
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Affiliation(s)
- Kenji Katayama
- Division of Field Crop Research, Institute of Crop Science, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- Corresponding author (e-mail: )
| | - Akira Kobayashi
- Division of Upland Farming Research, Kyushu Okinawa Agricultural Research Center, NARO,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
| | - Tetsufumi Sakai
- Division of Upland Farming Research, Kyushu Okinawa Agricultural Research Center, NARO,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
| | - Toshikazu Kuranouchi
- Division of Field Crop Research, Institute of Crop Science, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Yumi Kai
- Division of Upland Farming Research, Kyushu Okinawa Agricultural Research Center, NARO,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
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Kitahara K, Nakamura Y, Otani M, Hamada T, Nakayachi O, Takahata Y. Carbohydrate components in sweetpotato storage roots: their diversities and genetic improvement. BREEDING SCIENCE 2017; 67:62-72. [PMID: 28465669 PMCID: PMC5407920 DOI: 10.1270/jsbbs.16135] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 10/31/2016] [Indexed: 05/23/2023]
Abstract
Carbohydrates are important components in sweetpotatoes in terms of both their industrial use and eating quality. Although there has been a narrow range of diversity in the properties of sweetpotato starch, unique varieties and experimental lines with different starch traits have been produced recently both by conventional breeding and genetic engineering. The diversity in maltose content, free sugar composition and textural properties in sweetpotato cultivars is also important for their eating quality and processing of storage roots. In this review, we summarize the current status of research on and breeding for these important traits and discuss the future prospects for research in this area.
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Affiliation(s)
- Kanefumi Kitahara
- Department of Food Science and Biotechnology, Faculty of Agriculture, Kagoshima University,
1-21-24 Korimoto, Kagoahima, Kagoshima 890-0065,
Japan
| | - Yoshiyuki Nakamura
- Division of Field Crop Research, Institute of Crop Science, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Motoyasu Otani
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University,
Nonoichi, Ishikawa 921-8836,
Japan
| | - Tatsuro Hamada
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University,
Nonoichi, Ishikawa 921-8836,
Japan
| | - Osamu Nakayachi
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University,
Nonoichi, Ishikawa 921-8836,
Japan
| | - Yasuhiro Takahata
- Department of Planning, Kyushu Okinawa Agricultural Research Center, NARO,
Suya 2421, Koshi, Kumamoto 861-1192,
Japan
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Katayama K, Tamiya S, Sakai T, Kai Y, Ohara-Takada A, Kuranouchi T, Yoshinaga M. Inheritance of low pasting temperature in sweetpotato starch and the dosage effect of wild-type alleles. BREEDING SCIENCE 2015; 65:352-6. [PMID: 26366119 PMCID: PMC4542937 DOI: 10.1270/jsbbs.65.352] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/23/2015] [Indexed: 05/23/2023]
Abstract
Sweetpotato (Ipomoea batatas (L.) Lam.), which is an outcrossing hexaploid, is one of the most important starch-producing crops in the world. During the last decade, new sweetpotato cultivars, e.g. 'Quick Sweet', which have approximately 20°C lower pasting temperature, slower retrogradation and higher digestibility of raw starch than ordinary cultivars, have been developed in Japan. Genetic analysis of these variants with low pasting temperature starch was conducted in this study. Using 8 variants and 15 normal clones, 26 families were generated. The results from analyzing these progenies suggested that this trait is a qualitative character controlled by one recessive allele (designated spt), which is inherited in a hexasomic manner. A dosage effect of the wild-type Spt allele was found for starch pasting temperature, although the effect was not linear. These results will aid breeders to develop sweetpotato cultivars with a range of starch pasting temperatures.
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Affiliation(s)
- Kenji Katayama
- NARO Institute of Crop Science,
2-1-18 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- NARO Kyushu Okinawa Agricultural Research Center,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
| | - Seiji Tamiya
- NARO Institute of Crop Science,
2-1-18 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- NARO Hokkaido Agricultural Research Center,
9-4 Shinseiminami, Memuro, Kasai, Hokkaido 082-0071,
Japan
| | - Tetsufumi Sakai
- NARO Kyushu Okinawa Agricultural Research Center,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
| | - Yumi Kai
- NARO Kyushu Okinawa Agricultural Research Center,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
| | - Akiko Ohara-Takada
- NARO Institute of Crop Science,
2-1-18 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- Headquarters, National Agriculture and Food Research Organization (NARO),
3-1-1 Kannondai, Tsukuba, Ibaraki 305-8517,
Japan
| | - Toshikazu Kuranouchi
- NARO Institute of Crop Science,
2-1-18 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Masaru Yoshinaga
- NARO Kyushu Okinawa Agricultural Research Center,
6651-2 Yokoichi, Miyakonojo, Miyazaki 885-0091,
Japan
- Headquarters, National Agriculture and Food Research Organization (NARO),
3-1-1 Kannondai, Tsukuba, Ibaraki 305-8517,
Japan
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Carotenoids gene markers for sweetpotato (Ipomoea batatas L. Lam): applications in genetic mapping, diversity evaluation and cross-species transference. Mol Genet Genomics 2014; 289:237-51. [PMID: 24384928 DOI: 10.1007/s00438-013-0803-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 12/11/2013] [Indexed: 10/25/2022]
Abstract
Carotenoids play essential biological roles in plants, and genes involved in the carotenoid biosynthesis pathway are evolutionarily conserved. Orange sweetpotato is an important source of β-carotene, a precursor of vitamin A. In spite of this, only a few research studies have focussed on the molecular aspects of carotenoid genes regarding their specific sequence and structure. In this study, we used published carotenoid gene sequences from Ipomoea and other species for "exon-primed intron-crossing" approaches. Fifteen pairs of primers representing six carotenoid genes were designed for different introns, eleven of which amplified scorable and reproducible alleles. The sequence of PCR products showed high homology to the original ones. Moreover, the structure and sequence of the introns and exons from five carotenoid structural genes were partially defined. Intron length polymorphism and intron single nucleotide polymorphisms were detected in amplified sequences. Marker dosages and allelic segregations were analysed in a mapping population. The developed markers were evaluated in a set of Ipomoeas batatas accessions so as to analyse genetic diversity and conservation applicability. Using CG strategy combined with EPIC-PCR technique, we developed carotenoid gene markers in sweetpotato. We reported the first set of polymorphic Candidate Gene markers for I. batatas, and demonstrated transferability in seven wild Ipomoea species. We described the sequence and structure of carotenoid genes and introduced new information about genomic constitution and allele dosage.
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Kim SH, Song WK, Kim YH, Kwon SY, Lee HS, Lee IC, Kwak SS. Characterization of full-length enriched expressed sequence tags of dehydration-treated white fibrous roots of sweetpotato. BMB Rep 2009; 42:271-6. [PMID: 19470240 DOI: 10.5483/bmbrep.2009.42.5.271] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Sweetpotato (Ipomoea batatas (L). Lam.) is relatively tolerant to unfavorable growth conditions such as drought, yet has not been exploited to provide a better understanding of the molecular basis of drought stress tolerance. We obtained 983 high-quality expressed sequence tags of 100 bp or longer (average length of 700 bp) from cDNA libraries of detached white fibrous root tissues by subjecting them to dehydration for 6 h. The 431 cDNAs were each assigned a function by alignment using the BLASTX algorithm. Among them, three genes associated with various abiotic stresses and nine genes not previously associated with drought stress were selected for expression pattern analysis through detailed reverse transcription-polymerase chain reaction. The direct and indirect relationships of the 12 genes with drought tolerance mechanisms were ascertained at different developmental stages and under various stress conditions.
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Affiliation(s)
- Sun-Hyung Kim
- Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-333, Korea
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Hamada T, Kim SH, Shimada T. Starch-branching Enzyme I Gene (IbSBEI) from Sweet Potato (Ipomoea batatas); Molecular Cloning and Expression Analysis. Biotechnol Lett 2006; 28:1255-61. [PMID: 16802100 DOI: 10.1007/s10529-006-9083-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Accepted: 04/19/2006] [Indexed: 10/24/2022]
Abstract
The cDNA of the starch-branching enzyme I gene (IbSBEI) in the sweet potato (Ipomoea batatas) has been cloned and sequenced. The IbSBEI amino acid sequence was 81% identical to that of potato StSBEI. DNA gel-blot analyses demonstrated that at least two copies of IbSBEI are present in the sweet potato genome. IbSBEI was strongly expressed in tuberous roots. Transcript levels in the roots of single leaf cuttings were extremely low during the first 15-40 d after planting and continuously increased up to 50 d, by which time the tuberous roots had almost completely developed. This indicates that IbSBEI may work in concert with the AGPase large subunit during the primary phase of starch granule formation.
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Affiliation(s)
- Tatsuro Hamada
- Research Institute of Bioresource and Biotechnology, Ishikawa Prefectural University, Suematsu, Nonoichi, Ishikawa 921-8836, Japan.
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Kim SH, Hamada T. Rapid and reliable method of extracting DNA and RNA from sweetpotato, Ipomoea batatas (L). Lam. Biotechnol Lett 2006; 27:1841-5. [PMID: 16328977 DOI: 10.1007/s10529-005-3891-2] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2005] [Accepted: 09/19/2005] [Indexed: 10/25/2022]
Abstract
A quick, simple and reliable method of extracting DNA from sweetpotato (Ipomoea batatas (L.) Lam.) has been developed. The method was applied successfully for extraction of total DNA from leaves and total RNA from leaves and various tissues. The yield of DNA extracted by this procedure was high (about 1 mg/g leaf tissue). The extracted DNA was completely digested by restriction endonucleases indicating the absence of common contaminating compounds. The absorbancy ratios of A260/A230 and A260/A280 of isolated RNA were approx. 2 and the yield was about 0.2 mg/g fresh wt. CIPK and tublin genes were successfully amplified by RT-PCR, suggesting the integrity of isolated RNA. The total DNA and RNA isolated by this method was of sufficient quality for subsequent molecular analysis.
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MESH Headings
- 2-Propanol/chemistry
- Blotting, Southern
- Chloroform/chemistry
- DNA, Plant/genetics
- DNA, Plant/isolation & purification
- Electrophoresis, Agar Gel
- Ipomoea batatas/chemistry
- Ipomoea batatas/genetics
- Lithium Chloride/chemistry
- Pentanols/chemistry
- Plant Components, Aerial/chemistry
- Plant Components, Aerial/genetics
- Plant Leaves/chemistry
- Plant Leaves/genetics
- Plant Roots/chemistry
- Plant Roots/genetics
- Protein Kinases/genetics
- RNA, Plant/genetics
- RNA, Plant/isolation & purification
- RNA, Ribosomal/genetics
- RNA, Ribosomal/isolation & purification
- Reverse Transcriptase Polymerase Chain Reaction
- Spectrophotometry, Ultraviolet
- Tubulin/genetics
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Affiliation(s)
- Sun-Hyung Kim
- Research Institute of Bioresource and Biotechnology, Ishikawa Prefectural University, Suematu, 921-8836 Nonoichi, Ishikawa, Japan.
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Abstract
A nuclear AmyB gene from sweet potato encoding beta-amylase (beta Amy) that is abundant in tuberous roots and inducible in other organs by an exogenous supply of sucrose or polygalacturonic acid, was isolated and characterized. Genomic Southern blot hybridization, restriction maps of independently isolated phage lambda genomic clones, and the nucleotide sequence of AmyB compared with that of the cDNA, all suggested that beta Amy of sweet potato is encoded by a gene that is present in a single copy per haploid genome. In the sequence of AmyB, the sequence that is identical to that of the cDNA was split into seven exons by six introns, and the transcription of this gene starts from multiple sites 26 to 30 bp downstream from a potential TATA-box sequence, 5'-TATATAA. In the 5'-upstream region of AmyB, there are sequences homologous to those conserved in the 5'-upstream regions of genes encoding sporamin, which are regulated similarly to AmyB. The 5'-upstream region of AmyB also contains sequences to which several previously known plant nuclear factors bind.
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Affiliation(s)
- N Yoshida
- Laboratory of Biochemistry, School of Agriculture, Nagoya University, Japan
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Orjeda G, Freyre R, Iwanaga M. Use of Ipomoea trifida germ plasm for sweet potato improvement. 3. Development of 4x interspecific hybrids between Ipomoea batatas (L.) Lam. (2n=6x=90) and I. trifida (H.B.K) G. Don. (2n=2x=30) as storage-root initiators for wild species. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1991; 83:159-163. [PMID: 24202352 DOI: 10.1007/bf00226245] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/1991] [Accepted: 05/16/1991] [Indexed: 06/02/2023]
Abstract
More than 28,000 pollinations were carried out between 5 Ipomoea batatas and 41 diploid I. trifida accessions of diverse origins to obtain 4x interspecific hybrids. From the resultant 730 seeds, 248 plants were finally obtained. Ploidy level determination of the progeny showed unexpected results: 52 individuals were hexaploid, 5 were pentaploid, 190 were tetraploid, as expected, and one was not determined. The existence of 5x and 6x progenies from 6x x 2x crosses not only confirmed the presence of 2n gametes but also their successful function in gene flow between ploidy levels and polyploidization within this genus. The progeny and their cultivated parents were planted in an observation field. The cultivated parents produced 0.49 kg/plant or less. Most 4x progenies did not produce storage roots or had very poor yields; nonetheless, and despite their cultivated parents' poor yields, 8 genotypes yielded between 0.81 and 1.50 kg/plant.A new scheme, using the 4x interspecific hybrids, is proposed for evaluating 2x and 4x wild accessions of the section Batatas to which the sweet potato belongs. Other possible uses of the 4x hybrids in breeding and genetics of the sweet potato are also discussed.
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Affiliation(s)
- G Orjeda
- International Potato Center (CIP), P.O. Box 5969, Lima, Peru
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