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plant polyphenol oxidases

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https://www.readbyqxmd.com/read/27915144/antioxidant-enzyme-and-osmotic-adjustment-changes-in-bean-seedlings-as-affected-by-biochar-under-salt-stress
#1
Salar Farhangi-Abriz, Shahram Torabian
Salinity damaged cellular membranes through overproduction of reactive oxygen species (ROS), while osmolytes and antioxidant capacities play a vital role in protecting plants from salinity caused oxidative damages. Biochar also could alleviate the negative impacts of salt stress in crops. The pot experiment was conducted to investigate the effects of biochar on some antioxidant enzyme activities and osmolyte adjustments of common bean (Phaseolus vulgaris L. cv. Derakhshan) under salinity stress. Bean plants were subjected to three salinity levels (non-saline, 6 and 12 dSm(-1) of NaCl) and biochar treatments (non-biochar, 10% and 20% total pot mass)...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27895647/exogenous-trehalose-treatment-enhances-the-activities-of-defense-related-enzymes-and-triggers-resistance-against-downy-mildew-disease-of-pearl-millet
#2
Sharathchandra R Govind, Sudisha Jogaiah, Mostafa Abdelrahman, Hunthrike S Shetty, Lam-Son P Tran
In recent years, diverse physiological functions of various sugars are the subject of investigations. Their roles in signal transduction in plant responses to adverse biotic and abiotic stress conditions have become apparent, and growing scientific evidence has indicated that disaccharides like sucrose and trehalose mediate plant defense responses in similar way as those induced by elicitors against the pathogens. Trehalose is a well-known metabolic osmoregulator, stress-protectant and non-reducing disaccharide existing in a variety of organisms, including fungi, bacteria, and plants...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27875319/enhanced-oral-bioavailability-of-metoprolol-with-gallic-acid-and-ellagic-acid-in-male-wistar-rats-involvement-of-cyp2d6-inhibition
#3
Bhargavi Latha Athukuri, Prasad Neerati
BACKGROUND: Cytochrome P450-2D6 (CYP2D6), a member of the CYP450 mixed function oxidase system, is an important CYP isoform with regard to herbal-drug interactions and is responsible for the metabolism of nearly 25% of drugs. Until now, studies on the effects of various phytochemicals on CYP2D6 activity in vivo have been very rare. Gallic acid and ellagic acid are natural polyphenols which are widely distributed in fruits and medicinal plants. In the present study, the effects of gallic acid and ellagic acid pretreatment on intestinal transport and oral bioavailability of metoprolol were investigated...
December 1, 2016: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/27872630/control-of-wilt-and-rot-pathogens-of-tomato-by-antagonistic-pink-pigmented-facultative-methylotrophic-delftia-lacustris-and-bacillus-spp
#4
Veeranan Janahiraman, Rangasamy Anandham, Soon W Kwon, Subbiah Sundaram, Veeranan Karthik Pandi, Ramasamy Krishnamoorthy, Kiyoon Kim, Sandipan Samaddar, Tongmin Sa
The studies on the biocontrol potential of pink pigmented facultative methylotrophic (PPFM) bacteria other than the genus Methylobacterium are scarce. In the present study, we report three facultative methylotrophic isolates; PPO-1, PPT-1, and PPB-1, respectively, identified as Delftia lacustris, Bacillus subtilis, and Bacillus cereus by 16S rRNA gene sequence analysis. Hemolytic activity was tested to investigate the potential pathogenicity of isolates to plants and humans, the results indicates that the isolates PPO-1, PPT-1, and PPB-1 are not pathogenic strains...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27858273/comparison-of-the-phytoremediation-potentials-of-medicago-falcata-l-and-medicago-sativa-l-in-aged-oil-sludge-contaminated-soil
#5
Leonid Panchenko, Anna Muratova, Olga Turkovskaya
Thirteen-year monitoring of the vegetation growing in the industrial and adjacent areas of an oil refinery showed the prevalence of yellow medick (Medicago falcata L.) over other plant species, including alfalfa (Medicago sativa L.). A comparative field study of the two Medicago species established that yellow medick and alfalfa exhibited similar resistance to soil petroleum hydrocarbons and that the pollutant concentration in their rhizosphere was 30% lower than that in the surrounding bulk soil. In laboratory pot experiments, yellow medick reduced the contaminant content by 18% owing to the degradation of the major heavy oil fractions, such as paraffins, naphthenes, and alcohol and benzene tars; and it was more successful than alfalfa...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27814588/protective-effect-of-tangeritin-in-transgenic-drosophila-model-of-parkinson-s-disease
#6
Ambreen Fatima, Saba Khanam, Rahul Rahul, Smita Jyoti, Falaq Naz, Fahad Ali, Yasir Hasan Siddique
Parkinson's disease (PD) is a neurodegenerative disorder caused due to the loss of dopaminergic neurons in substantia nigra region of midbrain. The disease is characterized by the accumulation of alpha-synuclein into depositions known as lewy bodies. Till date there is no cure for PD but the limited number of medications may provide temporary relief from the PD symptoms. Flavonoids are a group of polyphenols found in plants. The health benefits of flavonoids have been universally accepted. Tangeritin is a pentamethoxy flavone found in the peels of Mandarin oranges (Citrus reticulata)...
January 1, 2017: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/27808257/physiological-response-and-sulfur-metabolism-of-the-v-dahliae-infected-tomato-plants-in-tomato-potato-onion-companion-cropping
#7
Xuepeng Fu, Chunxia Li, Xingang Zhou, Shouwei Liu, Fengzhi Wu
Companion cropping with potato onions (Allium cepa var. agrogatum Don.) can enhance the disease resistance of tomato plants (Solanum lycopersicum) to Verticillium dahliae infection by increasing the expressions of genes related to disease resistance. However, it is not clear how tomato plants physiologically respond to V. dahliae infection and what roles sulfur plays in the disease-resistance. Pot experiments were performed to examine changes in the physiology and sulfur metabolism of tomato roots infected by V...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27752946/co-application-of-6-ketone-type-brassinosteroid-and-metal-chelator-alleviates-cadmium-toxicity-in-b-juncea-l
#8
Ravdeep Kaur, Poonam Yadav, Ashwani Kumar Thukral, Amandeep Walia, Renu Bhardwaj
Plant growth regulator-assisted phytoremediation has been assessed as a novel strategy to improve phytoremediation potential of plants. In the present work, potential of castasterone, a plant growth regulator, combined with citric acid was explored for phytoremediation of cadmium in Brassica juncea seedlings. The seedlings were raised under controlled laboratory conditions for 7 days. Results revealed that 0.6 mM cadmium exposure induced toxicity in the seedlings, which was reflected through root growth inhibition, accumulation of hydrogen peroxide and malondialdehyde, and loss of cell viability...
October 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27750423/effect-of-plant-age-on-the-quantity-and-quality-of-the-proteins-extracted-from-sugar-beet-beta-vulgaris-l-leaves
#9
Alexandra Kiskini, Anne Vissers, Jean-Paul Vincken, Harry Gruppen, Peter Alexander Wierenga
Effects of the developmental stage (e.g. young, mature or senescent) of leaves on their chemical composition have been described in literature. This study focuses on the variation in chemical composition and quantity and quality of proteins extracted from leaves due to variation in plant age (i.e. harvesting time), using leaves from sugar beets grown in field (Rhino, Arrival) and in greenhouse (Isabella). Within the same variety (Rhino-field, Arrival-field, Isabella-greenhouse) the protein content was similar for leaves from young and old plants (22±1, 16±1, and 10±3% w/w db, respectively)...
October 17, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27690004/proteomic-analysis-of-hylocereus-polyrhizus-reveals-metabolic-pathway-changes
#10
Qingzhu Hua, Qianjun Zhou, Susheng Gan, Jingyu Wu, Canbin Chen, Jiaqiang Li, Yaoxiong Ye, Jietang Zhao, Guibing Hu, Yonghua Qin
Red dragon fruit or red pitaya (Hylocereus polyrhizus) is the only edible fruit that contains betalains. The color of betalains ranges from red and violet to yellow in plants. Betalains may also serve as an important component of health-promoting and disease-preventing functional food. Currently, the biosynthetic and regulatory pathways for betalain production remain to be fully deciphered. In this study, isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomic analyses were used to reveal the molecular mechanism of betalain biosynthesis in H...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27686467/stilbene-accumulation-and-expression-of-stilbene-biosynthesis-pathway-genes-in-wild-grapevine-vitis-amurensis-rupr
#11
Konstantin V Kiselev, Olga A Aleynova, Valeria P Grigorchuk, Alexandra S Dubrovina
We detected and quantified six stilbenes ( cis -piceid, t -piceid, t -ε-viniferin, cis -ε-viniferin, t -resveratrol, and t -δ-viniferin) in the leaves, petioles, berry skins, and seeds of wild-growing Vitis amurensis . The highest content of stilbenes and expression of stilbene biosynthesis genes were in the probes collected in the autumn and after ultraviolet elicitation. Stilbenes, including the best-studied stilbene resveratrol, are known to display valuable bioactivities and protect plants against various pathogens...
September 29, 2016: Planta
https://www.readbyqxmd.com/read/27664922/purification-of-polyphenol-oxidase-from-borage-trachystemon-orientalis-l-by-using-three-phase-partitioning-and-investigation-of-kinetic-properties
#12
Esma Hande Alici, Gulnur Arabaci
In this study a Polyphenol oxidase from borage plant was purified with 3.59-fold enrichment in the specific activity and 68.75% recovery of the total activity by using three-phase partitioning purification technique for the first time. Its molecular weight was found around 80kDa with sodium dodecyl sulfate polyacrylamide gel electrophoresis. The optimum pH and temperature values of the enzyme for the used four substrates ranged between the pH 5.0-7.5 and 5-30°C. The kcat/Km values showed that the enzyme has the greatest reactivity toward caffeic acid among the substrates used...
September 21, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27647014/flavonoids-gallotannins-and-ellagitannins-in-syzygium-guineense-and-the-traditional-use-among-malian-healers
#13
Thuy Lan Nguyen, Anders Rusten, Mona Skogsrud Bugge, Karl Egil Malterud, Drissa Diallo, Berit Smestad Paulsen, Helle Wangensteen
ETHNOPHARMACOLOGICAL RELEVANCE: Syzygium guineense has been traditionally used in Mali in West Africa for the treatment of different diseases such as stomach problems, wounds, inflammations and various female disorders. AIMS OF THE STUDY: (1) To perform an ethnopharmacological survey on the traditional use of S. guineense among Malian healers. (2) To isolate and identify chemical constituents from S. guineense leaves and to study their radical scavenging and enzyme inhibitory effects...
November 4, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27575873/dietary-fisetin-supplementation-protects-against-alcohol-induced-liver-injury-in-mice
#14
Qian Sun, Wenliang Zhang, Wei Zhong, Xinguo Sun, Zhanxiang Zhou
BACKGROUND: Overproduction of reactive oxygen species is associated with the development of alcoholic liver disease (ALD). Plant polyphenols have been used as dietary interventions for multiple diseases including ALD. The objective of this study was to determine whether dietary supplementation with fisetin, a novel flavonoid, exerts beneficial effect on alcohol-induced liver injury. METHODS: C57BL/6J mice were pair-fed with the Lieber-DeCarli control or ethanol (EtOH) diet for 4 weeks with or without fisetin supplementation at 10 mg/kg/d...
October 2016: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/27536521/suppression-of-magnaporthe-oryzae-and-interaction-between-bacillus-subtilis-and-rice-plants-in-the-control-of-rice-blast
#15
Yuexia Sha, Qi Wang, Yan Li
Magnaporthe oryzae, the causative pathogen of rice blast, has caused extensive losses to rice cultivation worldwide. Strains of the bacterium Bacillus subtilis have been used as biocontrol agents against rice blast. However, little has been reported about the interaction between B. subtilis and the rice plant and its mechanism of action. Here, the colonization process and induced disease resistance by B. subtilis SYX04 and SYX20 in rice plants was examined. Strains of B. subtilis labeled with green fluorescent protein reached population of more than 5 × 10(6) CFU/g after 20 days on mature rice leaves and were detected after 3 days on newly grown leaves...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27532545/plant-growth-promotion-and-suppression-of-bacterial-leaf-blight-in-rice-by-inoculated-bacteria
#16
Sumera Yasmin, Abha Zaka, Asma Imran, Muhammad Awais Zahid, Sumaira Yousaf, Ghulam Rasul, Muhammad Arif, Muhammad Sajjad Mirza
The present study was conducted to evaluate the potential of rice rhizosphere associated antagonistic bacteria for growth promotion and disease suppression of bacterial leaf blight (BLB). A total of 811 rhizospheric bacteria were isolated and screened against 3 prevalent strains of BLB pathogen Xanthomonas oryzae pv. oryzae (Xoo) of which five antagonistic bacteria, i.e., Pseudomonas spp. E227, E233, Rh323, Serratia sp. Rh269 and Bacillus sp. Rh219 showed antagonistic potential (zone of inhibition 1-19 mm)...
2016: PloS One
https://www.readbyqxmd.com/read/27494754/chrysobalanus-icaco-l-fruits-inhibit-nadph-oxidase-complex-and-protect-dna-against-doxorubicin-induced-damage-in-wistar-male-rats
#17
Vinicius Paula Venancio, Marcella Camargo Marques, Mara Ribeiro Almeida, Lilian Regina Barros Mariutti, Vanessa Cristina de Oliveira Souza, Fernando Barbosa, Maria Lourdes Pires Bianchi, Cleni Mara Marzocchi-Machado, Adriana Zerlotti Mercadante, Lusânia Maria Greggi Antunes
Chrysobalanus icaco L. is an underexplored plant found in tropical areas around the globe. Currently, there is no apparent information regarding the effects C. icaco fruits may exert in vivo or potential role in health promotion. This study aimed at providing evidence regarding the in vivo influence of this fruit on antigenotoxicity, antimutagenicity, and oxidative stress in rats. Male Wistar rats were treated with 100, 200, or 400 mg/kg body weight (bw)/d C. icaco fruit for 14 d. Doxorubicin (DXR, 15 mg/kg bw, ip) was used for DNA damaging and as an oxidant to generate reactive oxygen species (ROS)...
2016: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/27479773/mineralization-of-pyrene-induced-by-interaction-between-ochrobactrum-sp-pw-and-ryegrass-in-spiked-soil
#18
Tuo Liu, Lianshuang Wei, Min Qiao, Dexun Zou, Xiaojin Yang, Aijun Lin
This study was conducted to investigate the capability of pyrene-degrading bacterium Ochrobactrum sp. PW and ryegrass (Lolium multiflorum) grown alone and in combination on the degradation of pyrene in soil. After 60 days of ryegrass growth, plant biomass, pyrene-degrading microbial mass, soil enzyme activity (catalase activity and polyphenol oxidase activity) and residual concentration of pyrene in soils were determined. Higher dissipation rates were observed in PW inoculation treatments: ryegrass+PW rhizosphere soil (RP-r) and ryegrass+PW non-rhizosphere soil (RP-nr), than planting of ryegrass alone, rhizosphere (R-r) or non-rhizosphere (R-nr)...
November 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27475863/piceatannol-and-resveratrol-share-inhibitory-effects-on-hydrogen-peroxide-release-monoamine-oxidase-and-lipogenic-activities-in-adipose-tissue-but-differ-in-their-antilipolytic-properties
#19
Francisco Les, Simon Deleruyelle, Laure-Estelle Cassagnes, Jean A Boutin, Balázs Balogh, José M Arbones-Mainar, Simon Biron, Picard Marceau, Denis Richard, Françoise Nepveu, Pascale Mauriège, Christian Carpéné
Piceatannol is a hydroxylated derivative of resveratrol. While both dietary polyphenols coexist in edible plants and fruits, and share equivalent concentrations in several wines, the influence of piceatannol on adiposity has been less studied than that of resveratrol. Though resveratrol is now recognized to limit fat deposition in various obesity models, the benefit of its dietary supplementation remains under debate regarding human obesity treatment or prevention. The research for more potent resveratrol analogs is therefore still undergoing...
October 25, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27445991/a-complex-inoculant-of-n2-fixing-p-and-k-solubilizing-bacteria-from-a-purple-soil-improves-the-growth-of-kiwifruit-actinidia-chinensis-plantlets
#20
Hong Shen, Xinhua He, Yiqing Liu, Yi Chen, Jianming Tang, Tao Guo
Limited information is available if plant growth promoting bacteria (PGPB) can promote the growth of fruit crops through improvements in soil fertility. This study aimed to evaluate the capacity of PGPB, identified by phenotypic and 16S rRNA sequencing from a vegetable purple soil in Chongqing, China, to increase soil nitrogen (N), phosphorus (P), and potassium (K) availability and growth of kiwifruit (Actinidia chinensis). In doing so, three out of 17 bacterial isolates with a high capacity of N2-fixation (Bacillus amyloliquefaciens, XD-N-3), P-solubilization (B...
2016: Frontiers in Microbiology
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