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https://www.readbyqxmd.com/read/29352245/av2-protein-of-tomato-leaf-curl-palampur-virus-promotes-systemic-necrosis-in-nicotiana-benthamiana-and-interacts-with-host-catalase2
#1
Poonam Roshan, Aditya Kulshreshtha, Surender Kumar, Rituraj Purohit, Vipin Hallan
Tomato leaf curl Palampur virus (ToLCPalV) is a whitefly-transmitted, bipartite begomovirus. Here, we demonstrated that ectopic expression of AV2 from a Potato virus X (PVX)-based vector accelerated systemic necrosis and reactive oxygen species (ROS) accumulation in Nicotiana benthamiana. Furthermore, 10 amino acids from N-terminal region of AV2 were found to be associated with the systemic necrosis symptom/phenotype. Mutational studies of ToLCPalV infectious clones lacking the AV2 revealed that AV2 is essential for the systemic movement of DNA-A, symptom severity and viral DNA accumulation...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29347912/genome-wide-analysis-of-the-potato-hsp20-gene-family-identification-genomic-organization-and-expression-profiles-in-response-to-heat-stress
#2
Peng Zhao, Dongdong Wang, Ruoqiu Wang, Nana Kong, Chao Zhang, Chenghui Yang, Wentao Wu, Haoli Ma, Qin Chen
BACKGROUND: Heat shock proteins (Hsps) are essential components in plant tolerance mechanism under various abiotic stresses. Hsp20 is the major family of heat shock proteins, but little of Hsp20 family is known in potato (Solanum tuberosum), which is an important vegetable crop that is thermosensitive. RESULTS: To reveal the mechanisms of potato Hsp20s coping with abiotic stresses, analyses of the potato Hsp20 gene family were conducted using bioinformatics-based methods...
January 18, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29344660/purple-sweet-potato-color-attenuates-high-fat-induced-neuroinflammation-in-mouse-brain-by-inhibiting-mapk-and-nf-%C3%AE%C2%BAb-activation
#3
Jian Li, Zhao Shi, Yongjie Mi
Purple sweet potato color (PSPC) is a natural anthocyanin pigment that is derived from purple sweet potato storage roots. PSPC possesses a variety of biological activities, including antioxidant, anti‑inflammatory and neuroprotective effects; however, the detailed effects of PSPC on high‑fat diet (HFD)‑induced neuroinflammation remain to be determined. The aim of the present study was to investigate whether PSPC has a protective role in HFD‑associated neuroinflammation in the mouse brain and to provide novel insight into the mechanisms of the action...
January 17, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29340217/translational-cross-activation-of-the-encapsidated-rna-of-potexviruses
#4
M V Arkhipenko, N A Nikitin, E K Donchenko, O V Karpova, J G Atabekov
We had shown the genomic RNA of potexviruses potato virus X and the alternanthera mosaic virus to be inaccessible in vitro to ribosomes while in intact virion form, but the RNAs can be translationally activated following the binding of movement protein 1 (MP1) to virus particles. Here, we present the results of the follow-up study targeting two more potexvirus species - the Narcissus mosaic virus and the Potato aucuba mosaic virus. We found encapsidated potexviral RNA to share common translational features in vitro and the MP1 to be potent over homological virions of its "own" species and over heterological virions of other species, as well exhibiting selective specificity...
October 2017: Acta Naturae
https://www.readbyqxmd.com/read/29338687/use-of-easy-measurable-phenotypic-traits-as-a-complementary-approach-to-evaluate-the-population-structure-and-diversity-in-a-high-heterozygous-panel-of-tetraploid-clones-and-cultivars
#5
Martin E Tagliotti, Sofia I Deperi, Maria C Bedogni, Ruofang Zhang, Norma C Manrique Carpintero, Joseph Coombs, David Douches, Marcelo A Huarte
BACKGROUND: Diversity in crops is fundamental for plant breeding efforts. An accurate assessment of genetic diversity, using molecular markers, such as single nucleotide polymorphism (SNP), must be able to reveal the structure of the population under study. A characterization of population structure using easy measurable phenotypic traits could be a preliminary and low-cost approach to elucidate the genetic structure of a population. A potato population of 183 genotypes was evaluated using 4859 high-quality SNPs and 19 phenotypic traits commonly recorded in potato breeding programs...
January 16, 2018: BMC Genetics
https://www.readbyqxmd.com/read/29337064/cloning-and-functional-characterization-of-a-p-coumaroyl-quinate-shikimate-3-hydroxylase-from-potato-solanum-tuberosum
#6
Benjamin J Knollenberg, Jingjing Liu, Shu Yu, Hong Lin, Li Tian
Chlorogenic acid (CGA) plays an important role in protecting plants against pathogens and promoting human health. Although CGA accumulates to high levels in potato tubers, the key enzyme p-coumaroyl quinate/shikimate 3'-hydroxylase (C3'H) for CGA biosynthesis has not been isolated and functionally characterized in potato. In this work, we cloned StC3'H from potato and showed that it catalyzed the formation of caffeoylshikimate and CGA (caffeoylquinate) from p-coumaroyl shikimate and p-coumaroyl quinate, respectively, but was inactive towards p-coumaric acid in in vitro enzyme assays...
January 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29332809/peroxidase-catalyzed-chemiluminescence-system-and-its-application-in-immunoassay
#7
REVIEW
Zhao Zhang, Jiahui Lai, Kesen Wu, Xingcan Huang, Shuai Guo, Lili Zhang, Jian Liu
Peroxidases are widely used as catalysts in chemiluminescence (CL) reaction because of their excellent catalytic activity and various selectable species, such as horseradish peroxidase (HRP), sweet potato peroxidase (SPP) and soybean peroxidase (SbP). They have been employed in many different CL systems for the determination of hydrogen peroxidase (H2O2), nucleic acid, protein and so on. In this paper, the application of peroxidases in the most commonly used luminol-H2O2 CL system was reviewed from two aspects of horseradish peroxidase (HRP) and some anionic peroxidases...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29331861/synthesis-of-colloidal-silver-nanoparticle-clusters-and-their-application-in-ascorbic-acid-detection-by-sers
#8
Jorge L Cholula-Díaz, Diana Lomelí-Marroquín, Bidhan Pramanick, Alfonso Nieto-Argüello, Luis A Cantú-Castillo, Hyundoo Hwang
Ascorbic acid (vitamin C) has an essential role in the human body mainly due to its antioxidant function. In this work, metallic silver nanoparticle (AgNP) colloids were used in SERS experiments to detect ascorbic acid in aqueous solution. The AgNPs were synthesized by a green method using potato starch as reducing and stabilizing agent, and water as the solvent. The optical properties of the yellowish as-synthesized silver colloids were characterized by UV-vis spectroscopy, in which besides a typical band at 410 nm related to the localized surface plasmon resonance of the silver nanoparticles, a shoulder band around 500 nm, due to silver nanoparticle cluster formation, is presented when relatively higher concentrations of starch are used in the synthesis...
December 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29329841/effects-of-radio-frequency-assisted-blanching-on-polyphenol-oxidase-weight-loss-texture-color-and-microstructure-of-potato
#9
Zhenna Zhang, Juan Wang, Xueying Zhang, Qingli Shi, Le Xin, Hongfei Fu, Yunyang Wang
This paper is focused on the effects of radio frequency (RF) heating on the relative activity of polyphenol oxidase (PPO), weight loss, texture, color, and microstructure of potatoes. The results showed that pure mushroom PPO was almost completely inactivated at 80 °C by RF heating. The relative activity of potato PPO reduced to less than 10% with increasing temperature (25-85 °C). Enzyme extract showed the lowest PPO relative activity at 85 °C after RF treatment, followed by the potato cuboids and mashed potato, about 0...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29329810/facile-microencapsulation-of-olive-oil-in-porous-starch-granules-fabrication-characterization-and-oxidative-stability
#10
Miao Lei, Fang-Cheng Jiang, Jie Cai, Si Hu, Rui Zhou, Gang Liu, Yue-Hui Wang, Hai-Bo Wang, Jing-Ren He, Xin-Gao Xiong
In this study, starch with porous structures derived from purple sweet potato was prepared and used as a food-grade polymer for the microencapsulation of olive oil. The optimal reaction conditions for preparing porous starch were determined to improve its adsorption capacity as effective microcapsule-wall materials. Olive oil was then impregnated in microspheres, and loading ratio was optimized by investigating the restrictive factors, including the mass ratio of olive oil to porous starch, as well as the embedding temperature and time...
January 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29329405/solanaceous-exocyst-subunits-are-involved-in-immunity-to-diverse-plant-pathogens
#11
Yu Du, Elysa J R Overdijk, Jeroen A Berg, Francine Govers, Klaas Bouwmeester
The exocyst, a multiprotein complex consisting of eight subunits, plays an essential role in many biological processes by mediating secretion of post-Golgi-derived vesicles towards the plasma membrane. In recent years, roles for plant exocyst subunits in pathogen defence have been uncovered, largely based on studies in the model plant Arabidopsis. Only a few studies have been undertaken to assign the role of exocyst subunits in plant defence in other plants species, including crops. In this study, predicted protein sequences from exocyst subunits were retrieved by mining databases from the Solanaceous plants Nicotiana benthamiana, tomato, and potato...
January 10, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29329242/absorption-and-metabolism-of-phenolics-from-digests-of-polyphenol-rich-potato-extracts-using-the-caco-2-hepg2-co-culture-system
#12
Shima Sadeghi Ekbatan, Michele M Iskandar, Lekha Sleno, Kebba Sabally, Joelle Khairallah, Satya Prakash, Stan Kubow
The bioactivity of dietary polyphenols depends upon gastrointestinal and hepatic metabolism of secondary microbial phenolic metabolites generated via colonic microbiota-mediated biotransformation. A polyphenol-rich potato extract (PRPE) containing chlorogenic, caffeic, and ferulic acids and rutin was digested in a dynamic multi-reactor gastrointestinal simulator of the human intestinal microbial ecosystem (GI model). Simulated digestion showed extensive degradation of the parent compounds and the generation of microbial phenolic metabolites...
January 12, 2018: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29327646/late-blight-resistance-screening-of-major-wild-swedish-solanum-species-s-dulcamara-s-nigrum-and-s-physalifolium
#13
Kibrom Abreha, Åsa Lankinen, Laura Masini, Sofia Hydbom, Erik Andreasson
To understand the contribution of wild Solanum species to the epidemiology of potato late blight in Sweden, we characterized the resistance of the three putative alternative hosts; Solanum physalifolium, S. nigrum, and S. dulcamara to Phytophthora infestans, the causal agent of late blight. The pathogen sporulated in all ten investigated S. physalifolium genotypes, suggesting susceptibility (S phenotype). Field-grown S. physalifolium was naturally infected but could regrow, though highly infected genotypes were smaller at the end of the season...
January 12, 2018: Phytopathology
https://www.readbyqxmd.com/read/29325987/transfer-of-pectobacterium-carotovorum-subsp-carotovorum-strains-isolated-from-potatoes-grown-at-high-altitudes-to-pectobacterium-peruviense-sp-nov
#14
Malgorzata Waleron, Agnieszka Misztak, Michal Waleron, Martyna Franczuk, Bartosz Wielgomas, Krzysztof Waleron
Seven Gram-negative, rod-shaped pectinolytic bacteria strains designated as IFB5227, IFB5228, IFB5229, IFB5230, IFB5231, IFB5232, IFB5636, isolated from potato tubers cultivated in Peru at high altitude (2400-3800m) were subjected to polyphasic analyses that revealed their distinctiveness from the other Pectobacterium species. Phylogenetic analyses based on five housekeeping genes (gyrA, recA, recN, rpoA and rpoS) clearly showed strains separateness, simultaneously indicating Pectobacterium atrosepticum, Pectobacterium wasabiae, Pectobacterium parmentieri and Pectobacterium betavasculorum as the closest relatives...
December 21, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29322139/effects-of-polysaccharides-from-purple-sweet-potatoes-on-immune-response-and-gut-microbiota-composition-in-normal-and-cyclophosphamide-treated-mice
#15
Chao Tang, Jian Sun, Bo Zhou, Changhai Jin, Jun Liu, Juan Kan, Chunlu Qian, Nianfeng Zhang
In this study, three polysaccharides including water-soluble polysaccharide (WSP), dilute alkali-soluble polysaccharide (DASP) and concentrated alkali-soluble polysaccharide (CASP) were extracted from purple sweet potatoes and then administered to normal and cyclophosphamide (CTX) treated mice by gavage. The results showed that WSP and CASP could restore the spleen index and immune cytokine (IL-2 and IL-6) levels in CTX treated mice, while DASP could enhance the levels of TNF-α, IL-2 and IL-6. As compared to the normal control group, WSP and CASP treatment groups exhibited increased levels of Bacteroidetes, Lachnospiraceae and Oscillospira, but decreased levels of Firmicutes, Alcaligenaceae and Sutterella in normal mice...
January 11, 2018: Food & Function
https://www.readbyqxmd.com/read/29320724/purification-and-characterization-of-a-novel-high-molecular-weight-alkaline-protease-produced-by-an-endophytic-bacillus-halotolerans-strain-ct2
#16
Gharbi Dorra, Karkouch Ines, Ben Slimene Imen, Coquet Laurent, Azaiez Sana, Olfa Tabbene, Cosette Pascal, Jouenne Thierry, Limam Ferid
A protease-producing strain CT2 isolated from Tunisian potatoes, exhibiting a potent protease activity (prot CT2), was identified as Bacillus halotolerans according to 16S ribosomal DNA sequence analysis. Maximum prot CT2 production was obtained in medium supplemented with bean seed proteins. Proteolytic activity was purified by ammonium sulphate precipitation, Sephacryl S-200 gel filtration and SP-sepharose cation-exchange chromatography. Optimal enzyme activity was reached at pH 9 and temperature of 50 °C...
January 7, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29315972/differential-induction-of-polar-and-non-polar-metabolism-during-wound-induced-suberization-in-potato-solanum-tuberosum-l-tubers
#17
Kathlyn N Woolfson, Meghan L Haggitt, Yanni Zhang, Alexandra Kachura, Anica Bjelica, M Alejandra Rey Rincon, Karina M Kaberi, Mark A Bernards
Wound-induced suberin deposition involves the temporal and spatial coordination of phenolic and fatty acid metabolism. Phenolic metabolism leads to both soluble metabolites that accumulate as defense compounds as well as hydroxycinnamoyl derivatives that form the basis of the poly(phenolic) domain found in suberized tissue. Fatty acid metabolism involves the biosynthesis of very long chain fatty acids, 1-alkanols, ω-hydroxy fatty acids and α,ω-dioic acids that form a poly(aliphatic) domain, commonly referred to as suberin...
January 8, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29315596/relationships-between-tyrosine-phenylalanine-chlorogenic-acid-and-ascorbic-acid-concentrations-and-blackspot-biochemical-potential-and-blackspot-susceptibility-in-stored-russet-potatoes
#18
Aymeric Goyer, Julien Pellé
BACKGROUND: Blackspot in potato is an internal tissue discoloration that occurs during handling and transport of potato tubers. Blackspot is cosmetically undesirable and represents a huge economic cost for the potato industry. The aim of this study was to test whether concentrations of certain metabolites in the potato tuber cortex could predict blackspot susceptibility. RESULTS: Seven russet potato varieties were stored for eight months at 8.80 C. Stored tubers were subjected to mechanical impact and evaluated for blackspot susceptibility...
January 9, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29314007/chlorophyll-fluorescence-imaging-reveals-genetic-variation-and-loci-for-a-photosynthetic-trait-in-diploid-potato
#19
Aina E Prinzenberg, Marcela Víquez-Zamora, Jeremy Harbinson, Pim Lindhout, Sjaak van Heusden
Physiology and genetics are tightly interrelated. Understanding the genetic basis of a physiological trait such as the quantum yield of the photosystem II, or photosynthetic responses to environmental changes will benefit the understanding of these processes. By means of chlorophyll fluorescence imaging "CF", the quantum yield of photosystem II can be determined rapidly, precisely and non-invasively. In this article, the genetic control and variation in the steady-state quantum yield of PSII "ΦPSII " is analysed for diploid potato plants...
January 4, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29307117/genetic-mapping-of-quantitative-trait-loci-for-tuber-cadmium-and-zinc-concentration-in-potato-reveals-associations-with-maturity-and-both-overlapping-and-independent-components-of-genetic-control
#20
Molla F Mengist, Sheila Alves, Denis Griffin, Joanne Creedon, Mike J McLaughlin, Peter W Jones, Dan Milbourne
Cd is a toxic metal, whilst Zn is an essential for plant and human health. Both can accumulate in potato tubers. We examine the genetic control of this process. The aim of this study was to map quantitative trait loci (QTLs) influencing tuber concentrations of cadmium (Cd) and zinc (Zn). We developed a segregating population comprising 188 F1 progeny derived from crossing two tetraploid cultivars exhibiting divergent tuber-Cd-accumulation phenotypes. These progeny were genotyped using the SolCap 8303 SNP array, and evaluated for Cd, Zn, and maturity-related traits...
January 6, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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