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Potato anthocyanins

Teresa Cordero, Mohamed A Mohamed, Juan-José López-Moya, José-Antonio Daròs
Potato virus Y (PVY) is a major threat to the cultivation of potato and other solanaceous plants. By inserting a cDNA coding for the Antirrhinum majus Rosea1 transcription factor into a PVY infectious clone, we created a biotechnological tool (PVY-Ros1) that allows infection by this relevant plant virus to be tracked by the naked eye with no need for complex instrumentation. Rosea1 is an MYB-type transcription factor whose expression activates the biosynthesis of anthocyanin pigments in a dose-specific and cell-autonomous manner...
2017: Frontiers in Microbiology
Jingqiu Ge, Yijie Hu, Hongxia Wang, Yuanshe Huang, Peng Zhang, Zhihua Liao, Min Chen
BACKGROUND: Anthocyanins in Purple-fleshed Sweet Potato (PSP) are beneficial to human health. The leaf color (Lc) gene is a transcription factor involved in regulating anthocyanin biosynthesis. The anthocyanin profiles of wild-type PSP of Ayamurasaki and its three Lc-transgenic lines were investigated by HPLC-MS/MS. And in vitro antioxidant activities of wild-type and Lc-transgenic lines, including reducing power activity, DPPH radical scavenging activity, hydroxyl radical scavenging activity, linoleic acid autoxidation inhibition activity, ABTS free radical scavenging activity and oxygen radical absorbance capacity activity, were measured...
April 17, 2017: Journal of the Science of Food and Agriculture
Vincenzo D'Amelia, Riccardo Aversano, Alessandra Ruggiero, Giorgia Batelli, Ingo Appelhagen, Claudio Dinacci, Lionel Hill, Cathie Martin, Domenico Carputo
Wild potato species are useful sources allelic diversity and loci lacking in the cultivated potato. In these species, the presence of anthocyanins in leaves has been associated with a greater tolerance to cold stress. However, the molecular mechanisms that allow potatoes to withstand cold exposure remain unclear. Here, we show that the expression of AN2, a MYB transcription factor, is induced by low temperatures in wild, cold tolerant Solanum commersonii, and not in susceptible S. tuberosum varieties. We found that AN2 is a paralog of the potato anthocyanin regulator AN1, showing similar interaction ability with bHLH co-partners...
April 7, 2017: Plant, Cell & Environment
Matías Ariel Valiñas, María Luciana Lanteri, Arjen Ten Have, Adriana Balbina Andreu
Natural variation of Andean potato was used to study the biosynthesis of phenolic compounds. Levels of phenolic compounds and corresponding structural gene transcripts were examined in flesh and skin of tubers. Phenolic acids, mainly chlorogenic acid (CGA), represent the major compounds, followed by anthocyanins and flavan-3-ols. High-anthocyanin varieties have high levels of CGA. Both metabolite and transcript levels were higher in skin than in flesh and showed a good correspondence. Two hydroxycinnamoyl-CoA transferases (HCT/HQT) have been involved in CGA production, of which HCT reflects CGA levels...
August 15, 2017: Food Chemistry
Xiaoqiang Liu, Min Xiang, Yufang Fan, Chunxian Yang, Lingjiang Zeng, Qitang Zhang, Min Chen, Zhihua Liao
Purple-fleshed sweet potato is good for health due to rich anthocyanins in tubers. Although the anthocyanin biosynthetic pathway is well understood in up-ground organs of plants, the knowledge on anthocyanin biosynthesis in underground tubers is limited. In the present study, we isolated and functionally characterized a root-preferential gene encoding dihydrokaempferol reductase (IbDHKR) from purple-fleshed sweet potato. IbDHKR showed highly similarity with the reported dihydroflavonol reductases in other plant species at the sequence levels and the NADPH-binding motif and the substrate-binding domain were also found in IbDHKR...
2017: Frontiers in Plant Science
Abigail Sido, Sridhar Radhakrishnan, Sung Woo Kim, Elisabeth Eriksson, Frank Shen, Qunhua Li, Vadiraja Bhat, Lavanya Reddivari, Jairam K P Vanamala
Studies have shown a causal link between high-calorie diet (HCD) and colon cancer. However, molecular mechanisms are not fully elucidated. To understand etiology of HCD-induced colon carcinogenesis, we screened 10 pathways linked to elevated colonic cell proliferation and chronic inflammation in an HCD-consuming human-relevant pig model. We observed elevated colonic mucosal interleukin-6 (IL-6) expression in HCD-consuming pigs compared to standard diet controls (SD, P=.04), and IL-6 strongly correlated with Ki-67 proliferative index and zone, early biomarkers of colon cancer risk (r=0...
January 28, 2017: Journal of Nutritional Biochemistry
Tuba Esatbeyoglu, Miriam Rodríguez-Werner, Anke Schlösser, Peter Winterhalter, Gerald Rimbach
Sweet potato (Ipomoea batatas L.) is mainly cultivated in Asia. The deep purple color of purple sweet potato (PSP) is due to the high content of acylated anthocyanins. In the present study, PSP-derived polyphenols were identified using HPLC-PDA and HPLC-ESI-MS(n) analyses. After concentration of the polyphenols from PSP, preparative separation into two fractions, designated anthocyanins (AF) and copigments (CF), was carried out using adsorptive membrane chromatography. In enzyme inhibitory assays, all PSP samples inhibited the enzymes α-amylase, α-glucosidase and xanthine oxidase...
April 15, 2017: Food Chemistry
Zhenzhou Zhu, Tian Jiang, Jingren He, Francisco J Barba, Giancarlo Cravotto, Mohamed Koubaa
This work provides an evaluation of an ultrasound-assisted, combined extraction, centrifugation and ultrafiltration process for the optimal recovery of polyphenols. A purple sweet potato (PSP) extract has been obtained using ultrasonic circulating extraction equipment at a power of 840 W, a frequency of 59 kHz and using water as solvent. Extract ultrafiltration, using polyethersulfone (PES), was carried out for the recovery of polyphenol, protein and anthocyanin. Pre-treatment, via the centrifugation of purple sweet potato extract at 2500 rpm over 6 min, led to better polyphenol recovery, with satisfactory protein removal (reused for future purposes), than PSP extract filtration without centrifugation...
November 20, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Amber Furrer, Dennis P Cladis, Anne Kurilich, Ramesh Manoharan, Mario G Ferruzzi
Reported content and process stability of phenolics in potato products is inconsistent. Changes in phenolic content of select varieties through fresh and industrial preparation/reconstitution were assessed. Total chlorogenic acids (CQAs) ranged from 43 to 953mg/100g dw and were more concentrated in pigmented compared to white/yellow-fleshed potatoes. Anthocyanin (ANC) content ranged from 18.6 to 22.9mg/100g dw and were mainly present in the flesh of pigmented potatoes. Retention of phenolics through commercial processing ranged from 49 to 85% for pigmented varieties and 32-55% for white/yellow...
March 1, 2017: Food Chemistry
Inyoung Choi, Jun Young Lee, Monique Lacroix, Jaejoon Han
A new colorimetric pH indicator film was developed using agar, potato starch, and natural dyes extracted from purple sweet potato, Ipomoea batatas. Both agar and potato starch are solid matrices used to immobilize natural dyes, anthocyanins. The ultraviolet-visible (UV-vis) spectrum of anthocyanin extract solutions and agar/potato starch films with anthocyanins showed color variations to different pH values (pH 2.0-10.0). Fourier transform infrared (FT-IR) and UV-vis region spectra showed compatibility between agar, starch, and anthocyanin extracts...
March 1, 2017: Food Chemistry
Yi Ma, Chang-Jun Hou, Hui-Xiang Wu, Huan-Bao Fa, Jun-Jie Li, Cai-Hong Shen, Dan Li, Dan-Qun Huo
In this work, maltodextrin-grafted-cinnamic acid (MD-g-CA) was synthesised and used as wall material to improve the stability of purple sweet potato anthocyanins (PSPa) via microencapsualtion. MD-g-CA was prepared through esterification in a two-step convenient synthesis procedure and characterised using infra-red (IR) spectroscopy. The IR data indicated the typical ester carbonyl stretching at around 1721 cm(-1). Moreover, MD-g-CA could give about 40% inhibition of DPPH radical and present excellent UV-absorption, which were notably better than that of native MD...
September 2016: Journal of Microencapsulation
Dorota Gumul, Rafał Ziobro, Eva Ivanišová, Anna Korus, Július Árvay, Tomáš Tóth
The basis for gluten-free diet is often gluten-free bread, which is usually characterized by a low-nutritional value, and lacks any pro-health properties. Only after an introduction of gluten-free raw materials, containing high level of bioactive compounds it would be possible to obtain the product with a pro-health potential. The aim of the study was to analyze the content of bioactive compounds (total phenolic content, phenolic acids, flavonoids, flavonols, anthocyanins and carotenoids) in gluten-free bread prepared with 5% addition of freeze-dried red and purple potatoes as well as to assess their antioxidant potential...
August 25, 2016: International Journal of Food Sciences and Nutrition
Zhenzhou Zhu, Qingyan Guan, Mohamed Koubaa, Francisco J Barba, Shahin Roohinejad, Giancarlo Cravotto, Xinsun Yang, Shuyi Li, Jingren He
Ultrasound pre-treatment (UAE) was applied to assist the extraction of valuable compounds (polyphenols (especially anthocyanins), and proteins) from purple sweet potato (PSP). Under optimum conditions (ultrasound time (40min); supplementary hot extraction (80°C) up to 120min; pH: 2.5; ethanol concentration: 58%), the highest concentrations of polyphenols (3.877mg/g), anthocyanins (0.293mg/g), and proteins (0.753mg/g) were found, with minimal specific energy consumption (8406J/mg). Moreover, anthocyanin and non-anthocyanin polyphenols in PSP extract from optimized extraction temperature were identified using HPLC-DAD-ESI-MS(2)...
January 15, 2017: Food Chemistry
T Oki, M Kano, F Ishikawa, K Goto, O Watanabe, I Suda
The objective is to evaluate the efficacy of anthocyanin-rich purple-fleshed sweet potato (PSP) beverage on the serum levels of gamma-glutamyl transferase (GGT), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) in healthy Caucasians with borderline hepatitis. Forty healthy Caucasians (41-69 years) consumed three bottles of the PSP beverage (177 mg anthocyanins per 125-ml bottle) or placebo (1.3 mg) per day for 8 weeks. Thirty-nine subjects completed the study and two subjects were excluded from statistical analysis...
February 2017: European Journal of Clinical Nutrition
Tomoyuki Oki, Mitsuyoshi Kano, Osamu Watanabe, Kazuhisa Goto, Esther Boelsma, Fumiyasu Ishikawa, Ikuo Suda
An open-label study with one treatment arm was conducted to investigate changes in health-related biomarkers (blood pressure and liver enzyme activity) and the safety of 4 weeks of consuming a purple-fleshed sweet potato beverage in Caucasian subjects. Twenty healthy adults, 18-70 years of age, with a body mass index >25 kg/m(2), elevated blood pressure and elevated levels of liver function biomarkers consumed two cartons of purple-fleshed sweet potato beverage (125 ml, including 117 mg anthocyanin per carton) daily for 4 weeks...
2016: Bioscience of Microbiota, Food and Health
Khanitta Ruttarattanamongkol, Sasivimon Chittrakorn, Monthana Weerawatanakorn, Narong Dangpium
Pigmented sweet potatoes (SPs) are outstanding sources of anthocyanin, β-carotene and other color-related phytonutrients. However, fresh SP roots are highly perishable and difficult to store. To reduce losses and extend their uses, fresh SP could be converted into flour. SP cultivars with deep purple (Phichit 65-3) and orange-fleshed (T101) colors newly developed in Thailand were studied. The influence of drying methods on physico-chemical properties, anthocyanin, β-carotene and antioxidant activity retentions of purple and orange-fleshed SP flours (SPFs) was investigated...
April 2016: Journal of Food Science and Technology
Sang Hoon Lee, Seung Hee Oh, In Guk Hwang, Hyun Young Kim, Koan Sik Woo, Shun Hee Woo, Hong Sig Kim, Junsoo Lee, Heon Sang Jeong
This study was performed to evaluate and compare the antioxidant substance content and antioxidant activities of white (Superior) and colored (Hongyoung, Jayoung, Jasim, Seohong, and Jaseo) potatoes. The potatoes were extracted with 80% ethanol and were evaluated for the total polyphenol, flavonoid, and anthocyanin contents and for 1,1-diphenyl- 2-picrylhydrazyl (DPPH)/2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical scavenging activity, reducing power, and ferrous metal ion chelating effect...
June 2016: Preventive Nutrition and Food Science
Lijun Wang, Yuk Man Li, Lin Lei, Yuwei Liu, Xiaobo Wang, Ka Ying Ma, Chengnan Zhang, Hanyue Zhu, Yimin Zhao, Zhen-Yu Chen
A high fat diet induces the accumulation of lipid hydroperoxides (LPO), accelerates the ageing process and causes a greater mortality in Drosophila melanogaster. Purple sweet potato is rich in antioxidant anthocyanin. The purpose of the present study was to examine if supplementation of purple sweet potato anthocyanin (PSPA) could reduce the mortality of fruit flies fed a high-fat diet. Results showed that the mean lifespan of fruit flies was shortened from 56 to 35days in a dose-dependent manner when lard in the diet increased from 0% to 20%...
September 2016: Experimental Gerontology
Huseyin Ayvaz, Adnan Bozdogan, M Monica Giusti, Mustafa Mortas, Rene Gomez, Luis E Rodriguez-Saona
Efficient selection of potato varieties with enhanced nutritional quality requires simple, accurate and cost effective assays to obtain tuber chemical composition information. In this study, 75 Andean native potato samples from 7 Solanum species with different colors were characterized and quantified for their anthocyanin, phenolics and sugar content using traditional reference methods. IR (infrared) spectra of potato extracts were collected using a portable infrared system and partial least squares regression (PLSR) calibration models were developed...
November 15, 2016: Food Chemistry
Ali Ghasemzadeh, Daryush Talei, Hawa Z E Jaafar, Abdul Shukor Juraimi, Mahmud Tengku Muda Mohamed, Adam Puteh, Mohd Ridzwan A Halim
BACKGROUND: Sweet potato (Ipomoea batatas L.) is one of the most important consumed crops in many parts of the world because of its economic importance and content of health-promoting phytochemicals. METHODS: With the sweet potato (Ipomoea batatas L.) as our model, we investigated the exogenous effects of three plant-growth regulators methyl jasmonate (MeJA), salicylic acid (SA), and abscisic acid (ABA) on major phytochemicals in relation to phenylalanine ammonia lyase (PAL) activity...
May 28, 2016: BMC Complementary and Alternative Medicine
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