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https://www.readbyqxmd.com/read/28445700/design-synthesis-of-novel-chitosan-derivatives-bearing-quaternary-phosphonium-salts-and-evaluation-of-antifungal-activity
#1
Wenqiang Tan, Jingjing Zhang, Fang Luan, Lijie Wei, Yuan Chen, Fang Dong, Qing Li, Zhanyong Guo
Two novel chitosan derivatives modified with quaternary phosphonium salts were successfully synthesized, including tricyclohexylphosphonium acetyl chitosan chloride (TCPACSC) and triphenylphosphonium acetyl chitosan chloride (TPPACSC), and characterized by FTIR, (1)H NMR, and (13)C NMR spectra. The degree of substitution was also calculated by elemental analysis results. Their antifungal activities against Colletotrichum lagenarium, Watermelon fusarium, and Fusarium oxysporum were investigated in vitro using the radial growth assay, minimal inhibitory concentration, and minimum bactericidal concentration assay...
April 23, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28445588/the-relative-importance-of-pollinator-abundance-and-species-richness-for-the-temporal-variance-of-pollination-services
#2
Mark A Genung, Jeremy Fox, Neal M Williams, Claire Kremen, John Ascher, Jason Gibbs, Rachael Winfree
The relationship between biodiversity and the stability of ecosystem function is a fundamental question in community ecology, and hundreds of experiments have shown a positive relationship between species richness and the stability of ecosystem function. However, these experiments have rarely accounted for common ecological patterns, most notably skewed species abundance distributions and non-random extinction risks, making it difficult to know whether experimental results can be scaled up to larger, less manipulated systems...
April 26, 2017: Ecology
https://www.readbyqxmd.com/read/28436813/rf-heating-of-gold-cup-and-conductive-plastic-electrodes-during-simultaneous-eeg-and-mri
#3
Mukund Balasubramanian, William M Wells, John R Ives, Patrick Britz, Robert V Mulkern, Darren B Orbach
PURPOSE: To investigate the heating of EEG electrodes during magnetic resonance imaging (MRI) scans and to better understand the underlying physical mechanisms with a focus on the antenna effect. MATERIALS AND METHODS: Gold cup and conductive plastic electrodes were placed on small watermelons with fiberoptic probes used to measure electrode temperature changes during a variety of 1.5T and 3T MRI scans. A subset of these experiments was repeated on a healthy human volunteer...
2017: Neurodiagnostic Journal
https://www.readbyqxmd.com/read/28435133/de-novo-comparative-transcriptome-analysis-of-genes-involved-in-fruit-morphology-of-pumpkin-cultivars-with-extreme-size-difference-and-development-of-est-ssr-markers
#4
Aliki Xanthopoulou, Ioannis Ganopoulos, Fotis Psomopoulos, Maria Manioudaki, Theodoros Moysiadis, Aliki Kapazoglou, Maslin Osathanunkul, Sofia Michailidou, Apostolos Kalivas, Athanasios Tsaftaris, Irini Nianiou-Obeidat, Panagiotis Madesis
The genetic basis of fruit size and shape was investigated for the first time in Cucurbita species and genetic loci associated with fruit morphology have been identified. Although extensive genomic resources are available at present for tomato (Solanum lycopersicum), cucumber (Cucumis sativus), melon (Cucumis melo) and watermelon (Citrullus lanatus), genomic databases for Cucurbita species are limited. Recently, our group reported the generation of pumpkin (Cucurbita pepo) transcriptome databases from two contrasting cultivars with extreme fruit sizes...
April 20, 2017: Gene
https://www.readbyqxmd.com/read/28414630/infection-courts-in-watermelon-plants-leading-to-seed-infestation-by-fusarium-oxysporum-f-sp-niveum
#5
Aparna Petkar, Pingsheng Ji
Fusarium wilt incited by Fusarium oxysporum f. sp. niveum (FON) is a seed-transmitted disease that causes significant yield loss in watermelon production. The pathogen may infect watermelon seeds latently, which can be an important inoculum source and contribute to severe disease outbreak. However, information regarding infection courts of FON leading to infestation of watermelon seeds is limited. To determine how seeds in watermelon fruit can be infested by FON during the watermelon growing season, greenhouse and field experiments were conducted in 2014 and 2015 where watermelon flowers and immature fruit were inoculated with FON...
April 17, 2017: Phytopathology
https://www.readbyqxmd.com/read/28402027/simultaneous-determination-of-difenoconazole-trifloxystrobin-and-its-metabolite-trifloxystrobin-acid-residues-in-watermelon-under-field-conditions-by-gc%C3%A2-%C3%A2-ms-ms
#6
Di Kang, Haizhen Zhang, Yuling Chen, Fei Wang, Lihong Shi, Deyu Hu, Kankan Zhang
An optimized QuEChERS method for the simultaneous determination of difenoconazole, trifloxystrobin and its metabolite trifloxystrobin acid residues in watermelon and soil was developed and validated by gas chromatography with tandem mass spectrometry. The samples were extracted with acetonitrile (1% formic acid) and cleaned up by dispersive solid-phase extraction with octadecylsilane sorbent. The limit of quantification of the method was 0.01 mg/kg, and the limit of detection was 0.003 mg/kg for all three analytes...
April 12, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28398228/quantification-of-lycopene-%C3%AE-carotene-and-total-soluble-solids-in-intact-red-flesh-watermelon-citrullus-lanatus-using-on-line-near-infrared-spectroscopy
#7
Elena Tamburini, Stefania Costa, Irene Rugiero, Paola Pedrini, Maria Gabriella Marchetti
A great interest has recently been focused on lycopene and β-carotene, because of their antioxidant action in the organism. Red-flesh watermelon is one of the main sources of lycopene as the most abundant carotenoid. The use of near-infrared spectroscopy (NIRS) in post-harvesting has permitted us to rapidly quantify lycopene, β-carotene, and total soluble solids (TSS) on single intact fruits. Watermelons, harvested in 2013-2015, were submitted to near-infrared (NIR) radiation while being transported along a conveyor belt system, stationary and in movement, and at different positions on the belt...
April 11, 2017: Sensors
https://www.readbyqxmd.com/read/28393615/fractionation-amino-acid-profiles-antimicrobial-and-free-radical-scavenging-activities-of-citrullus-lanatus-seed-protein
#8
Priyanka Dash, Goutam Ghosh
In the present study, a modified Osborne fractionation method was followed to isolate albumin (Calb), globulin (Cglo), prolamin (Cpro) and glutelin (Cglu) successively from seeds of Citrullus lanatus (watermelon). This research work was undertaken to investigate the antimicrobial and antioxidant activities of isolated protein fractions of C. lanatus seed. Amino acid composition and molecular weight distribution were determined to establish their relationship with antimicrobial and antioxidant activity. Among all the fractions, Cpro was found to be most effective against A...
April 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28388893/genome-wide-identification-and-expression-analysis-of-cllax-clpin-and-clabcb-genes-families-in-citrullus-lanatus-under-various-abiotic-stresses-and-grafting
#9
Chenliang Yu, Wenqi Dong, Yihua Zhan, Zong-An Huang, Zhimiao Li, Il Seop Kim, Chenghao Zhang
BACKGROUND: Auxin plays an important role in regulating plant growth and development as well as in the response of plants to abiotic stresses. Auxin is transported by three kinds of major protein families, including the AUXIN RESISTANT 1/LIKE AUX1 (AUX⁄LAX) influx carriers, the PIN-FORMED (PIN) efflux carriers and the ATP binding cassette B/P-glycoprotein/Multidrug-resistance (ABCB/MDR/PGP) efflux/condition carriers. The biological function of several auxin transporter genes has been well characterized in Arabidopsis thaliana...
April 7, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28381964/biological-control-of-bacterial-fruit-blotch-of-watermelon-pathogen-acidovorax-citrulli-with-rhizosphere-associated-bacteria
#10
Mahesh Adhikari, Dil Raj Yadav, Sang Woo Kim, Young Hyun Um, Hyun Seung Kim, Seong Chan Lee, Jeong Young Song, Hong Gi Kim, Youn Su Lee
Bacterial fruit blotch (BFB), which is caused by Acidovorax citrulli, is a serious threat to watermelon growers around the world. The present study was conducted to screen effective rhizobacterial isolates against 35 different A. citrulli isolates and determine their efficacy on BFB and growth parameters of watermelon. Two rhizobacterial isolates viz. Paenibacillus polymyxa (SN-22), Sinomonas atrocyanea (NSB-27) showed high inhibitory activity in the preliminary screening and were further evaluated for their effect on BFB and growth parameters of three different watermelon varieties under greenhouse conditions...
April 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28381807/evaluation-of-the-effects-and-mechanism-of-l-citrulline-on-anti-obesity-by-appetite-suppression-in-obese-diabetic-kk-ay-mice-and-high-fat-diet-fed-sd-rats
#11
Maya Kudo, Hisae Yoshitomi, Maki Momoo, Shiori Suguro, Yoshie Yamagishi, Ming Gao
L-Citrulline (L-Cit), a free amino acid from watermelon, has effects on hypertension and anti-oxidization; however, there are few reports of effects related to obesity. This study investigated the effects and mechanism of L-Cit on anti-obesity in obese/diabetic KK-Ay mice and high-fat diet fed Sprague-Dawley (SD) rats. L-Cit induced significant reduction of food intake, body weight and fat tissue mass in obese/diabetic KK-Ay mice. Moreover, blood glucose level did not change but free fatty acid level and serum insulin level were significantly decreased by treatment with L-Cit, suggesting that L-Cit improved glucose and fatty metabolism in obesity model mice...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28373043/synthesis-characterization-and-antifungal-evaluation-of-novel-1-2-3-triazolium-functionalized-starch-derivative
#12
Wenqiang Tan, Jingjing Zhang, Fang Luan, Lijie Wei, Qing Li, Fang Dong, Zhanyong Guo
1,2,3-Triazolium-functionalized starch derivative was obtained by straightforward quaternization of the synthesized starch derivative bearing 1,2,3-triazole with benzyl bromide by combining the robust attributes of cuprous-catalyzed azide-alkyne cycloaddition. These novel starch derivatives were characterized by FTIR, UV-vis, (1)H NMR, (13)C NMR, and elemental analysis. Their antifungal activities against Colletotrichum lagenarium, Watermelon fusarium, and Phomopsis asparagi were investigated by hypha measurement in vitro...
April 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28369915/fruit-quality-of-seedless-watermelon-grafted-onto-squash-rootstocks-under-different-production-systems
#13
Qianru Liu, Xin Zhao, Jeffrey K Brecht, Charles A Sims, Tatiana Sanchez, Nicholas S Dufault
BACKGROUND: The market demand for seedless watermelon has been continuously increasing because of consumer preference. Grafting is a useful tool to manage soil-borne diseases in watermelon production, but the use of squash rootstocks may negatively affect watermelon fruit quality. Currently, most research has focused on seeded cultivars while grafting effects on seedless watermelons remain largely unknown. This multi-season study was conducted to assess the effects of squash rootstocks, including both Cucurbita maxima × C...
March 29, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28334069/standardized-sampling-plan-for-the-thrips-frankliniella-schultzei-thysanoptera-thripidae-on-watermelon-crops
#14
Cleovan Barbosa Pinto, Renato Almeida Sarmento, Tarcísio Visintin da Silva Galdino, Poliana Silvestre Pereira, Breno Gomes Barbosa, Carlos Henrique Oliveira Lima, Nilson Rodrigues da Silva, Marcelo Coutinho Picanço
Sampling plans are essential components of integrated pest management programs. The thrips Frankliniella schultzei (Trybom) (Thysanoptera: Thripidae) is an important pest of watermelon crops. Despite the importance of sampling plans and of F. schultzei as a pest of watermelon crops, no research has been previously conducted on this subject for this crop. The objective of this work was to create a standardized sampling plan for F. schultzei in watermelon crops. Over two consecutive years, weekly samplings were performed in commercial watermelon crops...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28316627/green-synthesis-and-characterization-of-silver-nanoparticles-using-citrullus-lanatus-fruit-rind-extract
#15
Michael Ndikau, Naumih M Noah, Dickson M Andala, Eric Masika
The wide-scale application of silver nanoparticles (AgNPs) in areas such as chemical sensing, nanomedicine, and electronics has led to their increased demand. Current methods of AgNPs synthesis involve the use of hazardous reagents and toxic solvents. There is a need for the development of new methods of synthesizing AgNPs that use environmentally safe reagents and solvents. This work reports a green method where silver nanoparticles (AgNPs) were synthesized using silver nitrate and the aqueous extract of Citrullus lanatus fruit rind as the reductant and the capping agent...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28302791/genomic-characterization-of-three-melon-necrotic-spot-viruses-detected-in-human-stool-specimens
#16
Rachel Marine, Christina Castro, Laura Magaña, Terry Fei Fan Ng, Kshama Aswath, Nikail Collins, Geun Woo Park, Jan Vinjé, M Steven Oberste
The complete coding sequences of three melon necrotic spot viruses (MNSVs) were obtained from viral metagenomics of stool samples from patients with acute gastroenteritis. These genomes were most similar to Spanish strains sequenced in 2003 and a novel MNSV watermelon strain in 2014.
March 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28298921/exogenous-melatonin-confers-salt-stress-tolerance-to-watermelon-by-improving-photosynthesis-and-redox-homeostasis
#17
Hao Li, Jingjing Chang, Hejie Chen, Zhongyuan Wang, Xiurong Gu, Chunhua Wei, Yong Zhang, Jianxiang Ma, Jianqiang Yang, Xian Zhang
Melatonin, a pleiotropic signal molecule, has been shown to play important roles in the regulation of plant growth, development, and responses to environmental stresses. Since a few species have been investigated to unveil the effect of exogenous melatonin on salt stress, the underlying mechanism of melatonin-mediated salt stress tolerance in other plant species still remains largely unknown. In this study, the effects of melatonin on leaf photosynthesis and redox homeostasis in watermelon were examined under salt stress (300 mM NaCl) along with different doses of melatonin (50, 150, and 500 μM) pretreatment...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28290292/novel-edible-oil-sources-microwave-heating-and-chemical-properties
#18
Seyed Mohammad Bagher Hashemi, Amin Mousavi Khaneghah, Mohamed Koubaa, Jaime Lopez-Cervantes, Seyed Hossein Asadi Yousefabad, Seyedeh Fatemeh Hosseini, Masoumeh Karimi, Azam Motazedian, Samira Asadifard
The aim of this work was to investigate the effect of various microwave heating times (1, 3, 5, 10, and 15min) on the chemical properties of novel edible oil sources, including Mashhadi melon (Cucumis melo var. Iranians cv. Mashhadi), Iranian watermelon (Citrullus lanatus cv. Fire Fon), pumpkin (Cucurbita pepo subsp. pepo var. Styriaca), and yellow apple (Malus domestica cv. Golden Delicious) seed oils. The evaluated parameters were peroxide value (PV), conjugated diene (CD) and triene (CT) values, carbonyl value (CV), p-anisidine value (AnV), oil stability index (OSI), radical scavenging activity (RSA), total tocopherols, total phenolics, as well as chlorophyll and carotenoid contents...
February 2017: Food Research International
https://www.readbyqxmd.com/read/28260140/complete-nucleotide-sequences-of-m-and-l-rnas-from-a-new-pepper-infecting-tospovirus-pepper-chlorotic-spot-virus
#19
Kuo-Shiou Huang, Chia-Hsing Tai, Ying-Huey Cheng, Shu-Hui Lin, Tsung-Chi Chen, Fuh-Jyh Jan
Pepper chlorotic spot virus (PCSV), newly found in Taiwan, was identified as a new tospovirus based on the molecular characterization of its S RNA. In this study, the complete M and L RNA sequences of PCSV were determined. The M RNA has 4795 nucleotides (nts), encoding the NSm protein of 311 aa (34.5 kDa) in the viral (v) strand and the glycoprotein precursor (Gn/Gc) of 1122 aa (127.6 kDa) in the viral complementary (vc) strand. The L RNA has 8859 nts, encoding the RNA-dependent RNA polymerase (RdRp) of 2873 aa (330...
March 4, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28250580/genome-wide-identification-and-comparative-expression-analysis-of-lea-genes-in-watermelon-and-melon-genomes
#20
Yasemin Celik Altunoglu, Mehmet Cengiz Baloglu, Pinar Baloglu, Esra Nurten Yer, Sibel Kara
Late embryogenesis abundant (LEA) proteins are large and diverse group of polypeptides which were first identified during seed dehydration and then in vegetative plant tissues during different stress responses. Now, gene family members of LEA proteins have been detected in various organisms. However, there is no report for this protein family in watermelon and melon until this study. A total of 73 LEA genes from watermelon (ClLEA) and 61 LEA genes from melon (CmLEA) were identified in this comprehensive study...
January 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
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