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red potato

Sydney Moser, Ingrid Aragon, Amber Furrer, Jan-Willem Van Klinken, Melissa Kaczmarczyk, Byung-Hoo Lee, Judy George, Bruce R Hamaker, Richard Mattes, Mario G Ferruzzi
Beneficial effects of some phenolic compounds in modulation of carbohydrate digestion and glycemic response have been reported, however effects of phenolics from processed potato products on these endpoints are not well known. The aims of this study were to characterize phenolic profiles of fresh potatoes (purple, red, or white fleshed; 2 varieties each) and chips, and to examine the potential for potato phenolic extracts (PPE) to modulate starch digestion and intestinal glucose transport in model systems. Following in vitro assessment, a pilot clinical study (n=11) assessed differences in glycemic response and gastric emptying between chips from pigmented and white potatoes...
February 12, 2018: Nutrition Research
Liping Yang, Yuesheng Xia, Yuchen Tao, Huihui Geng, Yanyan Ding, Yibin Zhou
Three kinds of potato starch were treated with 2.2 N HCl at 35 °C for 40 days, and their susceptibility to acid hydrolysis and the resulting structural changes were evaluated. Red potato starch was more susceptible to acid hydrolysis and presented highest rate of hydrolysis. Lintnerized starches had relatively low average molecular weights and z-average radius of gyration. HPAEC analyses showed three lintners presented different molecular size distributions. Lintnerized yellow potato starch had few chains of DP ≤ 12 (2...
May 15, 2018: Carbohydrate Polymers
Fred K Tabung, Lisa S Brown, Teresa T Fung
Purpose of review: Colorectal cancer (CRC) is a global public health problem, with an estimated 1.4 million cases diagnosed worldwide in 2012. Evidence suggests that diet may be important for primary prevention. Recent findings: The 2017 WCRF/AICR Continuous Update Project on colorectal cancer concluded that there is convincing evidence linking several individual dietary factors with CRC risk but the evidence for dietary patterns was limited and inconclusive. Also, previous reviews and meta-analyses have not critically synthesized various dietary patterns...
December 2017: Current Colorectal Cancer Reports
Christina E Larder, Megan Abergel, Stan Kubow, Danielle J Donnelly
Freeze-drying (FD) has utility for phytonutrient screening but its reliability for starch measurements is unclear. The impact of FD was tested on total (TS), digestible (DS) and resistant starch (RS) for four potato varieties (PC Red, GG Red, GG Yellow, and Dolbec Yellow). The treatments included: (a) tubers boiled and then cooled for 1h at room temperature (RT) (control; Treatment 1) and 24h at 4°C; (b) tubers boiled and then cooled for 1h at RT with subsequent FD (Treatment 2); and (c) raw tubers that underwent FD, then were rehydrated, boiled, and cooled for 1h at RT (Treatment 3)...
January 2018: Food Research International
Diganta Kalita, David G Holm, Daniel V LaBarbera, J Mark Petrash, Sastry S Jayanty
Diabetes mellitus is a chronic disease that is becoming a serious global health problem. Diabetes has been considered to be one of the major risks of cataract and retinopathy. Synthetic and natural product inhibitors of carbohydrate degrading enzymes are able to reduce type 2 diabetes and its complications. For a long time, potatoes have been portrayed as unhealthy for diabetic patients by some nutritionist due to their high starch content. However, purple and red potato cultivars have received considerable attention from consumers because they have high levels of polyphenolic compounds that have potent antioxidant activities...
2018: PloS One
Fang Liu, Yuanjun Yang, Jianwei Gao, Changle Ma, Yuping Bi
In this study, a red mutant was obtained through in vitro regeneration of a wild purple potato. High-performance liquid chromatography and Mass spectrometry analysis revealed that pelargonidin-3-O-glucoside and petunidin-3-O-glucoside were main anthocyanins in the mutant and wild type tubers, respectively. In order to thoroughly understand the mechanism of anthocyanin transformation in two materials, a comparative transcriptome analysis of the mutant and wild type was carried out through high-throughput RNA sequencing, and 295 differentially expressed genes (DEGs) were obtained...
2018: PloS One
Jaime Ruiz-Tovar, Maryana Bozhychko, Jone Miren Del-Campo, Evangelina Boix, Lorea Zubiaga, Jose Luis Muñoz, Carolina Llavero
PURPOSE: Dietary intake and food preferences change after bariatric surgery, secondary to gastrointestinal symptoms and dietitian counseling. The aim of this study was to evaluate the changes in the frequency intake of different foods in patients undergoing sleeve gastrectomy and following a strict dietary control. PATIENTS AND METHODS: A prospective observational study of all the morbidly obese patients undergoing laparoscopic sleeve gastrectomy as bariatric procedure between 2007 and 2012 was performed...
December 17, 2017: Obesity Surgery
Biljana Gigic, Heiner Boeing, Reka Toth, Jürgen Böhm, Nina Habermann, Dominique Scherer, Petra Schrotz-King, Clare Abbenhardt-Martin, Stephanie Skender, Hermann Brenner, Jenny Chang-Claude, Michael Hoffmeister, Karen Syrjala, Paul B Jacobsen, Martin Schneider, Alexis Ulrich, Cornelia M Ulrich
Quality of life (QoL) is an important clinical outcome in cancer patients. We investigated associations between dietary patterns and QoL changes in colorectal cancer (CRC) patients. The study included 192 CRC patients with available EORTC QLQ-C30 data before and 12 months post-surgery and food frequency questionnaire data at 12 months post-surgery. Principal component analysis was used to identify dietary patterns. Multivariate regression models assessed associations between dietary patterns and QoL changes over time...
January 2018: Nutrition and Cancer
Kemal Kazan, Donald Gardiner
Diseases caused by Fusarium pathogens inflict major yield and quality losses on many economically important plant species worldwide, including cereals. Fusarium crown rot (FCR) caused by Fusarium pseudograminearum is a cereal disease that occurs in many arid and semi-arid cropping regions of the world. In recent years, this disease has become more prevalent, in part due to the adoption of moisture-preserving cultural practices such as minimum tillage and stubble retention. In this pathogen profile, we present a brief overview of recent research efforts that not only have advanced our understanding of the interactions between F...
November 4, 2017: Molecular Plant Pathology
Candice Mazewski, Katie Liang, Elvira Gonzalez de Mejia
The objective was to compare the anti-proliferative effect of anthocyanin-rich plant extracts on human colon cancer cells and determine their mechanism of action. Eleven extracts were tested: red (RG) and purple grape, purple sweet potato, purple carrot, black and purple bean, black lentil (BL), black peanut, sorghum (SH), black rice, and blue wheat. HCT-116 and HT-29 inhibition correlated with total phenolics (r=0.87 and 0.77, respectively), delphinidin-3-O-glucoside concentration with HT-29 inhibition (r=0...
March 1, 2018: Food Chemistry
Feitong Wu, Karen Wills, Laura L Laslett, Brian Oldenburg, Graeme Jones, Tania Winzenberg
Influences of dietary patterns on musculoskeletal health are poorly understood in middle-aged women. This cross-sectional analysis from a cohort of 347 women (aged 36-57 years) aimed to examine associations between dietary patterns and musculoskeletal health outcomes in middle-aged women. Diet was measured by the Cancer Council of Victoria FFQ. Total body bone mineral content (TB BMC), femoral neck and lumbar spine bone density (dual-energy X-ray absorptiometry), lower limbs muscle strength (LMS) and balance tests (timed up and go test, step test, functional reach test (FRT) and lateral reach test) were also measured...
October 2017: British Journal of Nutrition
Neelam Yadav, Anil Kumar Chhillar, Chandra S Pundir
The nanoparticles of haemoglobin (HbNPs) were prepared by desolvation method and characterized by transmission electron microscopy (TEM),UV-vis spectroscopy, Fourier transformation infra red (FTIR) spectroscopy and X-ray diffraction (XRD) and atomic force microscopy (AFM). Protein profile of HbNPs was also studied by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). An amperometric acrylamide biosensor was constructed by immobilizing covalently HbNPs onto polycrystalline Au electrode. The Au electrode was characterized by scanning electron microscopy (SEM) and electrochemical impedance spectra (EIS) before and after immobilization of HbNPs...
September 28, 2017: International Journal of Biological Macromolecules
Miloslav Šulc, Zora Kotíková, Luboš Paznocht, Vladimír Pivec, Karel Hamouz, Jaromír Lachman
Certain potato cultivars are capable of producing anthocyanin pigments in the potato skin and flesh and those pigments have been shown, together with other phytochemicals, to promote good health. Six common anthocyanidins (cyanidin, delphinidin, petunidin, pelargonidin, malvidin and peonidin) were analyzed weekly for 15weeks in red- and purple-fleshed potato cultivars (Red Emma, Königspurpur, Valfi and Blaue de la Mancha) grown in field conditions using a validated LC-(+ESI)MS/MS method. Pelargonidin was the major type detected in red-fleshed cultivars whereas petunidin was the major type detected in the purple ones...
December 15, 2017: Food Chemistry
Hong Sodaneath, Jung-In Lee, Seung-Ok Yang, Hyekyeng Jung, Hee Wook Ryu, Kyung-Suk Cho
A new decolorizing white-rot fungus, OBR105, was isolated from Mount Odae in South Korea and identified by the morphological characterization of its fruit body and spores and partial 18s rDNA sequences. The ligninolytic enzyme activity of OBR105 was studied to characterize their decolorizing mechanism using a spectrophotometric enzyme assay. For the evaluation of the decolorization capacity of OBR105, the isolate was incubated in an erlenmeyer flask and in an airlifte bioreator with potato dextrose broth (PDB) medium supplemented with each dye...
September 19, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Guy Polturak, Noam Grossman, David Vela-Corcia, Yonghui Dong, Adi Nudel, Margarita Pliner, Maggie Levy, Ilana Rogachev, Asaph Aharoni
Betalains are tyrosine-derived red-violet and yellow plant pigments known for their antioxidant activity, health-promoting properties, and wide use as food colorants and dietary supplements. By coexpressing three genes of the recently elucidated betalain biosynthetic pathway, we demonstrate the heterologous production of these pigments in a variety of plants, including three major food crops: tomato, potato, and eggplant, and the economically important ornamental petunia. Combinatorial expression of betalain-related genes also allowed the engineering of tobacco plants and cell cultures to produce a palette of unique colors...
August 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
Shumei Wang, Petra C Boevink, Lydia Welsh, Ruofang Zhang, Stephen C Whisson, Paul R J Birch
The potato blight pathogen Phytophthora infestans secretes effector proteins that are delivered inside (cytoplasmic) or can act outside (apoplastic) plant cells to neutralize host immunity. Little is known about how and where effectors are secreted during infection, yet such knowledge is essential to understand and combat crop disease. We used transient Agrobacterium tumefaciens-mediated in planta expression, transformation of P. infestans with fluorescent protein fusions and confocal microscopy to investigate delivery of effectors to plant cells during infection...
October 2017: New Phytologist
Whasun Lim, Gwonhwa Song
Delphinidin is a member of the anthocyanidin family and is a natural pigment in red cabbage, berries, sweet potatoes and grapes. It possesses nutraceutical properties against various chronic diseases and types of cancer. However, little is known about its preventative effects on epithelial ovarian cancer, a disease that is associated with a low survival rate, a poor prognosis and a high rate of recurrence. The results of the present study demonstrated that the proliferation of SKOV3 cells decreased in a dose-dependent manner in response to treatment with delphinidin, and the phosphorylation of carcinogenic protein kinases associated with the progression of epithelial ovarian cancer was affected by delphinidin treatment...
July 2017: Oncology Letters
Anne Oertel, Andrea Matros, Anja Hartmann, Panagiotis Arapitsas, Klaus J Dehmer, Stefan Martens, Hans-Peter Mock
Metabolite profiling of tuber flesh and peel for selected colored potato varieties revealed cultivar and tissue specific profiles of anthocyanins and other polyphenols with variations in composition and concentration. Starchy tubers of Solanum tuberosum are a staple crop and food in many countries. Among cultivated potato varieties a huge biodiversity exists, including an increasing number of red and purple colored cultivars. This coloration relates to the accumulation of anthocyanins and is supposed to offer nutritional benefits possibly associated with the antioxidative capacity of anthocyanins...
August 2017: Planta
M Cilião Filho, M B D Bertéli, J S Valle, L D Paccola-Meirelles, G A Linde, F G Barcellos, N B Colauto
The genetic diversity of epiphytic yeasts from grape carposphere is susceptible to environmental variations that determine the predominant carposphere microbiota. Understanding the diversity of yeasts that inhabit grape carposphere in different environments and their pectinolytic activity is a way to understand the biotechnological potential that surrounds us and help improve winemaking. Therefore, this study aimed to evaluate the pectinolytic activity and characterize the genetic diversity of isolated epiphytic yeasts from grape carposphere...
June 20, 2017: Genetics and Molecular Research: GMR
Claudia C Gras, Nicole Nemetz, Reinhold Carle, Ralf M Schweiggert
Anthocyanin profiles and contents of three purple sweet potato provenances were investigated by HPLC-DAD-MS(n). In contrast to widely uniform profiles, the contents of total (558-2477mg/100gDM) and individual anthocyanins varied widely. Furthermore, quantitative and qualitative effects of intermolecular co-pigmentation were studied by adding chlorogenic and rosmarinic acids, and food-grade phenolic apple and rosemary extracts at various dosages to a diluted purple sweet potato concentrate at pH 0.9, 2.6, 3...
November 15, 2017: Food Chemistry
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