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https://www.readbyqxmd.com/read/29775867/phytochemical-profiles-phototoxic-and-antioxidant-properties-of-eleven-hypericum-species-a-comparative-study
#1
Edoardo Napoli, Laura Siracusa, Giuseppe Ruberto, Alessandra Carrubba, Silvia Lazzara, Antonio Speciale, Francesco Cimino, Antonella Saija, Mariateresa Cristani
Hypericum is one out of the nine genera belonging to the botanical family Clusiaceae Lindl (syn. Hypericaceae Juss.; APG III, 2009). The genus contains 484 species spread worldwide, one of which, Hypericum perforatum, is largely used in folk medicine. The aim of this study was to evaluate the chemical composition, along with the antioxidant and phototoxic activity, of 11 Hypericum species grown in Sicily (H. perforatum L., H. aegypticum L., H. androsaemum L., H. calycinum L., H. hircinum L., H. hirsutum L...
May 15, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29775725/anti-hepatitis-c-virus-activity-and-synergistic-effect-of-nymphaea-alba-extracts-and-bioactive-constituents-in-liver-infected-cells
#2
Sidra Rehman, Usman Ali Ashfaq, Bushra Ijaz, Sheikh Riazuddin
BACKGROUND: Without an effective vaccine, hepatitis C virus (HCV) remains a global threat, inflicting 170-300 million carriers worldwide at risk of cirrhosis and hepatocellular carcinoma (HCC). Though various direct acting antivirals have been redeemed the hepatitis C treatment, a few restraints persist including possible side effects, viral resistance emergence, excessive cost which restricts its availability to a common person. HYPOTHESIS: There is no preventive HCV vaccine available today so the discovery of potent antiviral natural flora and their bioactive constituents may help to develop preventive cures against HCV infection...
May 15, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29775508/lfr-is-functionally-associated-with-as2-to-mediate-leaf-development-in-arabidopsis
#3
Xiaowei Lin, Dandan Gu, Hongtao Zhao, Yue Peng, Guofang Zhang, Mengge Li, Zhijuan Wang, Xiutang Wang, Sujuan Cui
Leaves are essential organs for plants. We previously identified a functional gene possibly encoding a component of the SWI/SNF complex named LFR (Leaf and Flower Related) in Arabidopsis thaliana. Loss-of-function mutants of LFR displayed obvious defects in leaf morphogenesis, indicating its vital role in leaf development. Here an allelic null mutant of ASYMMETRIC LEAVES2 (AS2), as2-6, was isolated as an enhancer of lfr-1 in petiole length, vasculature pattern and leaf margin development. The lfr as2 double mutants showed enhanced ectopic expression of BP than each of the single mutant, which is consistent with their synergistic genetic enhancement in multiple BP-dependent development processes...
May 18, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29775272/remarkable-enhancement-in-the-photoelectric-performance-of-uniform-flower-like-mesoporous-fe3o4-wrapped-in-nitrogen-doped-graphene-networks
#4
Jixin Yao, Kang Zhang, Wen Wang, Xueqin Zuo, Qun Yang, Huaibao Tang, Mingzai Wu, Guang Li
The porous structure and excellent specific surface area are superior for use as a counter electrode (CE) material. In addition, N-doped graphene possesses a remarkable electron-transfer pathway and many active sites. Therefore, a novel idea is to wrap uniform flower-like mesoporous Fe3O4 (Fe3O4UFM) in a N-doped graphene (N-RGO) network structure to enhance the power conversion efficiency (PCE). The hybrid materials of Fe3O4UFM@N-RGO are first used as a CE in dye-sensitized solar cells (DSSCs), showing a preeminent conductive interconnected 3D porous structure with more catalytic activity sites and a better ability for and a faster reaction rate of charge transfer, resulting in quicker reduction of I_3^- than Pt...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29774352/a-novel-efficient-g-c-3-n-4-bioi-p-n-heterojunction-photocatalyst-constructed-through-the-assembly-of-g-c-3-n-4-nanoparticles
#5
Zengyu You, Chenyan Wu, Qianhong Shen, Yang Yu, Hao Chen, Yuxuan Su, Hui Wang, Chunchun Wu, Fang Zhang, Hui Yang
An efficient and facile method to fabricate a surficial dispersive heterojunction based on the assembly of g-C3N4 nanoparticles was proposed. A p-n nano heterojunction composed of BiOI and g-C3N4 was constructed by simply loading g-C3N4 nanoparticles on flower-like BiOI nanosheets. The structure-dependent optical, electronic and photoelectric properties were investigated, and the structure-property relationship was discussed. The results show that the g-C3N4 nanoparticles are uniformly loaded on the surface of BiOI nanosheets and thus form a p-n heterojunction with an intimate interface...
May 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29774046/identification-of-rice-genes-associated-with-enhanced-cold-tolerance-by-comparative-transcriptome-analysis-with-two-transgenic-rice-plants-overexpressing-dacbf4-or-dacbf7-isolated-from-antarctic-flowering-plant-deschampsia-antarctica
#6
Mi Young Byun, Li Hua Cui, Jungeun Lee, Hyun Park, Andosung Lee, Woo Taek Kim, Hyoungseok Lee
Few plant species can survive in Antarctica, the harshest environment for living organisms. Deschampsia antarctica is the only natural grass species to have adapted to and colonized the maritime Antarctic. To investigate the molecular mechanism of the Antarctic adaptation of this plant, we identified and characterized D. antarctica C-repeat binding factor 4 ( DaCBF4 ), which belongs to monocot CBF group IV. The transcript level of DaCBF4 in D. antarctica was markedly increased by cold and dehydration stress...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29774044/identification-and-functional-characterization-of-sugarcane-invertase-inhibitor-shinh1-a-potential-candidate-for-reducing-pre-and-post-harvest-loss-of-sucrose-in-sugarcane
#7
Suresha G Shivalingamurthy, Raveendra Anangi, Sundaravelpandian Kalaipandian, Donna Glassop, Glenn F King, Anne L Rae
In sugarcane, invertase enzymes play a key role in sucrose accumulation and are also involved in futile reactions where sucrose is continuously degraded during the pre- and post-harvest period, thereby reducing sugar yield and recovery. Invertase inhibitor (INVINH) proteins play a key role in post-translation regulation of plant invertases through which sucrose hydrolysis is controlled. INVINH proteins are small (18 kDa) members of the pectin methylesterase inhibitor superfamily and they are moderately conserved across plants...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29774039/a-membrane-bound-nac-like-transcription-factor-osntl5-represses-the-flowering-in-oryza-sativa
#8
Siyi Guo, Shaojun Dai, Prashant K Singh, Hongyan Wang, Yanan Wang, Jeanie L H Tan, Wanyi Wee, Toshiro Ito
In spite of short-day (SD) nature, rice ( Oryza sativa ) shares a conserved photoperiodic network for flowering control with long-day plants like Arabidopsis thaliana. Flowering or heading is an important agronomic trait in rice. NAC transcription factors (TFs) are well-conserved and one of the largest families of plant TFs. However, their function in flowering or heading time is not well-known yet. A preferential expression of a membrane-bound NAC-like TF OsNTL5 in developing leaves and panicles of rice indicated to us its putative role in flowering...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29774038/altered-expression-of-the-malate-permeable-anion-channel-osalmt4-reduces-the-growth-of-rice-under-low-radiance
#9
Jie Liu, Muyun Xu, Gonzalo M Estavillo, Emmanuel Delhaize, Rosemary G White, Meixue Zhou, Peter R Ryan
We examined the function of OsALMT4 in rice ( Oryza sativa L.) which is a member of the aluminum-activated malate transporter family. Previous studies showed that OsALMT4 localizes to the plasma membrane and that expression in transgenic rice lines results in a constitutive release of malate from the roots. Here, we show that OsALMT4 is expressed widely in roots, shoots, flowers, and grain but not guard cells. Expression was also affected by ionic and osmotic stress, light and to the hormones ABA, IAA, and salicylic acid...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29773848/identification-and-tissue-distribution-of-chemosensory-protein-and-odorant-binding-protein-genes-in-tropidothorax-elegans-distant-hemiptera-lygaeidae
#10
Yue-Qin Song, Hui-Zhong Sun, Jun Du
Tropidothorax elegans Distant (Hemiptera: Lygaeidae) is an insect pest that inflicts damage to vegetables and flowering plants across China. The olfactory system regulates insect behavior, such as feeding, mating, oviposition and predator avoidance. Odorant-binding proteins (OBPs) and the chemosensory proteins (CSPs) are two groups of small soluble proteins that initiate olfactory signal transduction in insects. In this study, we generated antennal transcriptomes of male and female T. elegans, and identified 19 putative OBP (14 classic OBPs and five plus-C OBPs) and seven CSP genes...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772906/visualization-and-semi-quantity-study-of-the-distribution-of-ma-jor-components-in-wheat-straw-in-mesoscopic-scale-using-ftir-microspectroscopic-imaging
#11
Zengling Yang, Jiaqi Mei, Zhiqiang Liu, Guangqun Huang, Guan Huang, Lujia Han
Understanding the biochemical heterogeneity of plant tissue linked to crop straw anatomy is attractive to plant researchers and researchers in the field of biomass-refinery. This study provides an in-situ analysis and semi-quantitative, visualization distributions of major composition distribution in internodal transverse sections of wheat straw based on FTIR microspec-troscopic imaging, with a fast Non-Negativity-Constrained Least Squares (fast NNLS) fitting. The paper investigates changes in biochemical components of tissue during stages of elongation, booting, heading, flowering, grain-filling, milk-ripening, dough, and full-ripening...
May 18, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29772800/identification-and-expression-of-mirnas-related-to-female-flower-induction-in-walnut-juglans-regia-l
#12
Li Zhou, Shaowen Quan, Hang Xu, Li Ma, Jianxin Niu
Flower induction is an essential stage in walnut ( Juglans regia L.) trees, directly affecting yield, yield stability, fruit quality and commodity value. The objective of this study was to identify miRNAs related to female flower induction via high-throughput sequencing and bioinformatics analysis. A total of 123 miRNAs were identified including 51 known miRNAs and 72 novel miRNAs. Differential expression was observed in 19 of the known miRNAs and 34 of the novel miRNAs. Twelve miRNAs were confirmed by RT-qPCR...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772665/investigating-the-role-of-gold-nanoparticle-shape-and-size-in-their-toxicities-to-fungi
#13
Kangze Liu, Zhonglei He, Hugh J Byrne, James F Curtin, Furong Tian
Gold nanoparticles (GNPs) are increasingly being used in a wide range of applications, and such they are being released in greater quantities into the environment. Consequently, the environmental effects of GNPs, especially toxicities to living organisms, have drawn great attention. However, their toxicological characteristics still remain unclear. Fungi, as the decomposers of the ecosystem, interact directly with the environment and critically control the overall health of the biosphere. Thus, their sensitivity to GNP toxicity is particularly important...
May 16, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29772647/the-antimicrobial-activity-of-annona-emarginata-schltdl-h-rainer-and-most-active-isolated-compounds-against-clinically-important-bacteria
#14
Juan G Dolab, Beatriz Lima, Ewelina Spaczynska, Jiri Kos, Natividad H Cano, Gabriela Feresin, Alejandro Tapia, Francisco Garibotto, Elisa Petenatti, Monica Olivella, Robert Musiol, Josef Jampilek, Ricardo D Enriz
Annona emarginata (Schltdl.) H. Rainer, commonly known as "arachichú", "araticú", "aratigú", and "yerba mora", is a plant that grows in Argentina. Infusions and decoctions are used in folk medicine as a gargle against throat pain and for calming toothache; another way to use the plant for these purposes is chewing its leaves. Extracts from bark, flowers, leaves, and fruits from A. emarginata were subjected to antibacterial assays against a panel of Gram (+) and Gram (-) pathogenic bacteria according to Clinical and Laboratory Standards Institute protocols...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772115/phenolic-profile-of-artemisia-alba-turra
#15
Antoaneta Trendafilova, Milka Todorova, Victoria Genova, Samuel Peter, Evelyn Wolfram, Kalina Danova, Luba Evstatieva
The aim of this study was to evaluate flower and leaf methanol extracts of A. alba Turra for their total phenolic and flavonoid contents, antioxidant capacity and to investigate their phenolic composition. The flower extract was richer in total phenolics and flavonoids and possessed higher antioxidant activity through DPPH and ABTS assays. The UHPLC-PDA-MS analysis of the flower and leaf methanol extracts revealed similar phenolic profile and allowed identification of 31 phenolic compounds (flavonoids, coumarins and phenolic acids) by comparison with the respective reference compounds or tentatively characterized by their chromatographic behavior, UV patterns and MS fragmentations...
May 17, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29772090/lcm-seq-reveals-the-crucial-role-of-lssoc1-in-heat-promoted-bolting-of-lettuce-lactuca-sativa-l
#16
Zijing Chen, Wensheng Zhao, Danfeng Ge, Yingyan Han, Kang Ning, Chen Luo, Shenglin Wang, Renyi Liu, Xiaolan Zhang, Qian Wang
Lettuce (Lactuca sativa L.) is one of the most economically important vegetables. The floral transition in lettuce is accelerated under high temperatures, which can significantly decrease yields. However, the molecular mechanism underlying the floral tranition in lettuce is poorly known. Using laser capture microdissection coupled with RNA sequencing, we isolated shoot apical meristem cells from the bolting-sensitive lettuce line S39 at four critical stages of development. Subsequently, we screened specifically for the flowering-related gene LsSOC1 during the floral transition through comparative transcriptomic analysis...
May 17, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29771542/quantifying-cannabis-a-field-study-of-marijuana-quantity-estimation
#17
Mark A Prince, Bradley T Conner, Matthew R Pearson
The assessment of marijuana use quantity poses unique challenges. These challenges have limited research efforts on quantity assessments. However, quantity estimates are critical to detecting associations between marijuana use and outcomes. We examined accuracy of marijuana users' estimations of quantities of marijuana they prepared to ingest and predictors of both how much was prepared for a single dose and the degree of (in)accuracy of participants' estimates. We recruited a sample of 128 regular-to-heavy marijuana users for a field study wherein they prepared and estimated quantities of marijuana flower in a joint or a bowl as well as marijuana concentrate using a dab tool...
May 17, 2018: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/29771352/de-novo-biosynthesis-of-anthocyanins-in-saccharomyces-cerevisiae
#18
Michael Eichenberger, Anders Hansson, David Fischer, Lara Dürr, Michael Naesby
Anthocyanins (ACNs) are plant secondary metabolites responsible for most of the red, purple and blue colors of flowers, fruits and vegetables. They are increasingly used in the food and beverage industry as natural alternative to artificial colorants. Production of these compounds by fermentation of microorganisms would provide an attractive alternative. In this study, Saccharomyces cerevisiae was engineered for de novo production of the three basic anthocyanins, as well as the three main trans-flavan-3-ols...
June 1, 2018: FEMS Yeast Research
https://www.readbyqxmd.com/read/29768574/growth-yield-and-grain-nutritional-quality-in-three-brazilian-pearl-millets-pennisetum-americanum-l-with-african-or-indian-origins
#19
Leonardo O Medici, Fabíola V Gonçalves, Marcos Paulo S DA Fonseca, Salete A Gaziola, Daiana Schmidt, Ricardo A Azevedo, Carlos Pimentel
In this study, we are presenting recommendations to the best agricultural use as well as for plant breeding of three millet cultivars namely ENA1 and ENA2, which have African origin, and BRS1501 originally from India. These cultivars were evaluated for growth, yield and grain quality traits. The morphological traits evaluated in this study indicated that the African genotypes ENA1 and ENA2 are better than the Indian genotype BRS1501 for no-till farming or to produce forage with 15% of crude protein at flowering and at harvest to produce stover (around 7% of crude protein content) for livestock feeding...
May 14, 2018: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29768252/chemical-composition-and-antifungal-activity-of-essential-oils-from-four-asteraceae-plants-grown-in-egypt
#20
Rose Vanessa Bandeira Reidel, Simona Nardoni, Francesca Mancianti, Claudia Anedda, Abd El-Nasser G El Gendy, Elsayed A Omer, Luisa Pistelli
The objective of the present paper was the assessment of the chemical composition of the essential oils from four Asteraceae species with a considerable food, medicinal, and agricultural value, collected in Egypt, together with their in vitro inhibitory activity against molds and yeasts. The essential oil of Launaea cornuta flowers was also evaluated for the first time, but because of its very low yield (<0.01%), no antifungal test was performed.
May 16, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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