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https://www.readbyqxmd.com/read/29772492/high-copper-content-in-vineyard-soils-promotes-modifications-in-photosynthetic-parameters-and-morphological-changes-in-the-root-system-of-red-niagara-plantlets
#1
Vítor Gabriel Ambrosini, Daniel José Rosa, George Wellington Bastos de Melo, Jovani Zalamena, Cesar Cella, Daniela Guimarães Simão, Leandro Souza da Silva, Henrique Pessoa Dos Santos, Moreno Toselli, Tadeu Luis Tiecher, Gustavo Brunetto
High copper (Cu) soil contents, due to the continuous vineyard application of Cu fungicides throughout the years, may impair the growth of the shoot and modify the structure of the root system. The current study aimed to investigate the threshold levels of available Cu in the soil causing toxicity effects in young grapevine plants of 'Red Niagara' cultivated in clay soils. Grapevine plantlets were cultivated in pots containing vineyard devoted soils with increasing contents of available Cu (25, 80, 100 and 165 mg kg-1 ), for 53 days...
May 8, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29772462/photocatalytic-mineralization-and-degradation-kinetics-of-sulphamethoxazole-and-reactive-red-194-over-silver-zirconium-co-doped-titanium-dioxide-reaction-mechanisms-and-phytotoxicity-assessment
#2
Saraschandra Naraginti, Yi Li, Gianluca Li Puma
The photodegradation and phytotoxicity of the pharmaceutical antibiotic, sulphamethoxazole (SMX) and the azo-dye reactive-red-194 (RR194) under visible-light irradiation of TiO2 nanoparticles modified by silver and zirconium was investigated. The results indicated that sulphamethoxazole and its toxic degradation by product, 3-amino-5-methylisoxazole and RR-194 could be degraded efficiently by the co-doped Zr/Ag-TiO2 catalyst. PL studies and ROS generation results suggested that the effective charge separation was carried out while irradiation of the modified TiO2 nanoparticles...
May 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29752674/effect-of-pseudomonas-fluorescens-and-pyoverdine-on-the-phytoextraction-of-cesium-by-red-clover-in-soil-pots-and-hydroponics
#3
Alice Hazotte, Olivier Péron, Pierre Gaudin, Abdesselam Abdelouas, Thierry Lebeau
With the aim of improving the phytoextraction rate of cesium (Cs), the effect of Pseudomonas fluorescens ATCC 17400 and its siderophore pyoverdine (PVD) on the uptake of Cs by red clover was studied in soil pots. This work also provides a mechanistic understanding of the Cs-bacteria (or PVD)-illite-plant interactions by using a simplified experimental design, i.e., hydroponics with either Cs in solution or Cs-spiked illite in suspension. For soil spiked with 11.2 mmol kg-1 (1480 mg kg-1 ) of Cs, 0.43% of total Cs was taken up by red clover in 12 days (119 μmol g-1 (16 mg g-1 ) of Cs dry matter in roots and 40 μmol g-1 (5 mg g-1 ) in shoots)...
May 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29745197/-effects-of-different-proportions-of-red-and-blue-light-on-the-growth-and-photosynthesis-of-tomato-seedlings
#4
Li Wei Wang, Yan Li, Guo Feng Xin, Min Wei, Qing Hua Mi, Qi Chang Yang
In order to explore the mechanism of response of growth and development of tomato seedlings to the combination of red and blue light, the light-emitting-diodes (LEDs) as precision modulation light sources were used in this study with 7 treatments including red (R) light, blue (B) light and combination of R+B light (9R1B, 6R1B, 3R1B, 1R1B, 1R3B), white (W) light as control, and the effects of different proportions of R and B light on the growth, photosynthetic pigment content, photosynthetic characteristics, chlorophyll fluorescence and root activity of tomato seedlings with variety of 'SV0313TG' as experiment material were studied...
May 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29744274/genetic-linkage-map-and-qtl-identification-for-adventitious-rooting-traits-in-red-gum-eucalypts
#5
Murugan Sumathi, Vijaya Kumar Waman Bachpai, A Mayavel, Modhumita Ghosh Dasgupta, Binai Nagarajan, D Rajasugunasekar, Veerasamy Sivakumar, Ramasamy Yasodha
The eucalypt species, Eucalyptus tereticornis and Eucalyptus camaldulensis , show tolerance to drought and salinity conditions, respectively, and are widely cultivated in arid and semiarid regions of tropical countries. In this study, genetic linkage map was developed for interspecific cross E. tereticornis  ×  E. camaldulensis using pseudo-testcross strategy with simple sequence repeats (SSRs), intersimple sequence repeats (ISSRs), and sequence-related amplified polymorphism (SRAP) markers. The consensus genetic map comprised totally 283 markers with 84 SSRs, 94 ISSRs, and 105 SRAP markers on 11 linkage groups spanning 1163...
May 2018: 3 Biotech
https://www.readbyqxmd.com/read/29741060/-effects-of-soil-ph-on-the-competitive-uptake-of-amino-acids-by-maize-and-microorganisms
#6
Qing Xu Ma, Jun Wang, Xiao Chuang Cao, Yan Sun, Tao Sun, Liang Huan Wu
Organic nitrogen can play an important role in plant growth, and soil pH changed greatly due to the over-use of chemical fertilizers, but the effects of soil pH on the competitive uptake of amino acids by plants and rhizosphere microorganisms are lack of detailed research. To study the effects of soil pH on the uptake of amino acids by maize and soil microorganisms, two soils from Hangzhou and Tieling were selected, and the soil pH was changed by the electrokinesis, then the 15 N-labeled glycine was injected to the centrifuge tube with a short-term uptake of 4 h...
July 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29738553/first-record-of-in-vitro-formation-of-ectomycorrhizae-in-psidium-cattleianum-sabine-a-native-myrtaceae-of-the-brazilian-atlantic-forest
#7
Cassio Geremia Freire, Admir José Giachini, João Peterson Pereira Gardin, Ana Claudia Rodrigues, Renato Luis Vieira, César Milton Baratto, Simone Silmara Werner, Bernardo Haas Abreu
Like many other species of trees native to the Brazilian Mata Atlântica (Atlantic Forest), the Myrtaceae, such as the Red Araza (Psidium cattleianum Sabine), are widely cited as arbuscular mycorrhizal formers. Nevertheless, recent studies show evidence that Myrtaceae from different tropical, subtropical and neotropical ecosystems can also prompt the formation of ectomycorrhizae, indicating that this species' ectomycorrhizal status should be further explored. Because of this, this research effort studied the in vitro interaction between the Red Araza and two ectomycorrhizal fungi isolates, belonging to the Pisolithus microcarpus (D17) and Scleroderma citrinum (UFSC-Sc133) species...
2018: PloS One
https://www.readbyqxmd.com/read/29737867/antihyperlipidemic-glycosides-from-the-root-bark-of-lycium-chinense
#8
Hui Chen, Yu-Jie Li, Yan-Jun Sun, Xiao-Kun Li, Gong Jian-Hong, Ya Wu, Fang-Yi Su, Kun Du, Yan-Li Zhang, Wei-Sheng Feng
Three new glycosides (1-3), together with six known ones (4-9), were isolated from the root bark of Lycium chinense. Their structures were elucidated on the basis of MS and NMR spectroscopic data. Five compounds (3, 5, 6, 8, and 9) exhibited potent antihyperlipidemic activities in HepG2 cells as assessed by Oil Red O staining and significant inhibition of intracellular triglyceride (TG) levels, whereas two compounds (5 and 9) significantly reduced total cholesterol (TC) levels.
May 8, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29732118/total-synthesis-of-the-reported-structure-of-ceanothine-d-via-a-novel-macrocyclization-strategy
#9
Jisun Lee, Madeleine M Joullié
The first total synthesis of the reported structure of ceanothine D, a cyclopeptide alkaloid found in red root, was achieved using a highly convergent synthetic strategy. Highlights of the synthesis include the first concomitant macrocyclization and formation of the unique chiral tertiary alkyl-aryl ether bond with complete regio- and stereo-control in the presence of a sensitive Z -enamide moiety to access the strained para -cyclophane present in its structure. This synthetic strategy may be broadly applicable in the generation of other structurally similar cyclopeptide alkaloids, enabling further biological and chemical investigations...
March 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29732050/quantum-chemical-studies-of-redox-properties-and-conformational-changes-of-a-four-center-iron-co-2-reduction-electrocatalyst
#10
Hyesu Jang, Yudong Qiu, Marshall E Hutchings, Minh Nguyen, Louise A Berben, Lee-Ping Wang
The CO2 reduction electrocatalyst [Fe4 N(CO)12 ]- (abbrev. 1 - ) reduces CO2 to HCO2 - in a two-electron, one-proton catalytic cycle. Here, we employ ab initio calculations to estimate the first two redox potentials of 1 - and explore the pathway of a side reaction involving CO dissociation from 1 3- . Using the BP86 density functional approximation, the redox potentials were computed with a root mean squared error of 0.15 V with respect to experimental data. High temperature Born-Oppenheimer molecular dynamics was employed to discover a reaction pathway of CO dissociation from 1 3- with a reaction energy of +10...
March 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29719543/low-molecular-weightt-polysaccharides-from-pyropia-yezoensis-enhance-tolerance-of-wheat-seedlings-triticum-aestivum-l-to-salt-stress
#11
Ping Zou, Xueli Lu, Changliang Jing, Yuan Yuan, Yi Lu, Chengsheng Zhang, Lei Meng, Hongtao Zhao, Yiqiang Li
Soil salinity is one of the major issues worldwide that affects plant growth and reduces agricultural productivity. Seaweed polysaccharides have been shown to promote crop growth and improve the resistance of plant to abiotic stresses. Pyropia yezoensis is a commercially important edible red alga in Southeast Asia. However, there is little research on the application of polysaccharides from P. yezoensis in agriculture. The molecular weight (MW) of polysaccharides influences their properties. Therefore, in this study, four representative polysaccharides from P...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29719458/molecular-signaling-of-ginsenosides-rb1-rg1-and-rg3-and-their-mode-of-actions
#12
REVIEW
Padmanaban Mohanan, Sathiyamoorthy Subramaniyam, Ramya Mathiyalagan, Deok-Chun Yang
Ginseng has gained its popularity as an adaptogen since ancient days because of its triterpenoid saponins, known as ginsenosides. These triterpenoid saponins are unique and classified as protopanaxatriol and protopanaxadiol saponins based on their glycosylation patterns. They play many protective roles in humans and are under intense research as various groups continue to study their efficacy at the molecular level in various disorders. Ginsenosides Rb1 and Rg1 are the most abundant ginsenosides present in ginseng roots, and they confer the pharmacological properties of the plant, whereas ginsenoside Rg3 is abundantly present in Korean Red Ginseng preparation, which is highly known for its anticancer effects...
April 2018: Journal of Ginseng Research
https://www.readbyqxmd.com/read/29710653/quantifying-suspended-solids-in-small-rivers-using-satellite-data
#13
Celso M Isidro, Neil McIntyre, Alex M Lechner, Ian Callow
The management of suspended solids and associated contaminants in rivers requires knowledge of sediment sources. In-situ sampling can only describe the integrated impact of the upstream sources. Empirical models that use surface reflectance from satellite images to estimate total suspended solid (TSS) concentrations can be used to supplement measurements and provide spatially continuous maps. However, there are few examples, especially in narrow, shallow and hydrologically dynamic rivers found in mountainous areas...
April 16, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29697808/a-mathematical-model-of-photosynthetic-electron-transport-in-response-to-light-spectrum-based-on-excitation-energy-distributed-to-photosystems
#14
Keach Murakami, Ryo Matsuda, Kazuhiro Fujiwara
To enable us to analyze the effects of the spectral distribution of light (i.e. light quality) on the photosynthetic electron transport more systematically, we propose a simple mathematical model which describes electron transport reactions under light-limited conditions based on the excitation energy distributed to the photosystems. The model assumes that the rate-limiting photosystem performs the photochemical reaction at its maximum yield, while the yield in the other photosystem is passively down-regulated to equalize the rates of linear electron transport through the photosystems...
April 25, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29692811/antifungal-compound-isolated-from-catharanthus-roseus-l-pink-for-biological-control-of-root-rot-rubber-diseases
#15
R Zahari, N Halimoon, M F Ahmad, S K Ling
Rigidoporus microporus, Ganoderma philippii, and Phellinus noxius are root rot rubber diseases and these fungi should be kept under control with environmentally safe compounds from the plant sources. Thus, an antifungal compound isolated from Catharanthus roseus was screened for its effectiveness in controlling the growth of these fungi. The antifungal compound isolated from C. roseus extract was determined through thin layer chromatography (TLC) and nuclear magnetic resonance (NMR) analysis. Each C. roseus of the DCM extracts was marked as CRD1, CRD2, CRD3, CRD4, CRD5, CRD6, and CRD7, respectively...
2018: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/29684689/is-the-chlorophyll-derivative-zn-ii-e-6-me-a-good-photosensitizer-to-be-used-in-root-canal-disinfection
#16
P Diogo, M Mota, C Fernandes, D Sequeira, P Palma, F Caramelo, M G P M S Neves, M A F Faustino, T Gonçalves, J M Santos
BACKGROUND: The aim of this study was to assess antimicrobial efficacy and cytotoxic outcomes of a chlorophyll based photosensitizer (PS) Zn(II)chlorin e6 methyl ester (Zn(II)e6 Me), when applied to human dentin discs and root blocks infected with 48 h biofilms. The results were compared with the ones obtained with FotoSan® (commercial Toluidine Blue O formulation) and 3% sodium hypochlorite (NaOCl). METHODOLOGY: Dentin and root blocks were infected with mixed biofilms of Enterococcus faecalis and Candida albicans; exposed for 15 min to 0...
April 20, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29683812/current-trends-in-aortic-root-surgery-the-mini-bentall-approach
#17
Djamila Abjigitova, Georgia Panagopoulos, Oleg Orlov, Vishal Shah, Konstadinos A Plestis
OBJECTIVE: The mini-sternotomy approach is becoming a widespread technique for aortic valve surgery. However, its safety for aortic root replacement has yet to be established. The aim of the present study was to compare the operative outcomes of patients who underwent aortic root replacement via upper mini-sternotomy (mini-Bentall) to patients who underwent Bentall procedure via median sternotomy (full-sternotomy Bentall). METHODS: Between November 1998 and November 2016, 91 consecutive patients underwent full-sternotomy Bentall procedure and 26 patients underwent mini-Bentall procedure...
April 20, 2018: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29682425/description-and-spatial-inference-of-soil-drainage-using-matrix-soil-colours-in-the-lower-hunter-valley-new-south-wales-australia
#18
Brendan P Malone, Alex B McBratney, Budiman Minasny
Soil colour is often used as a general purpose indicator of internal soil drainage. In this study we developed a necessarily simple model of soil drainage which combines the tacit knowledge of the soil surveyor with observed matrix soil colour descriptions. From built up knowledge of the soils in our Lower Hunter Valley, New South Wales study area, the sequence of well-draining → imperfectly draining → poorly draining soils generally follows the colour sequence of red → brown → yellow → grey → black soil matrix colours...
2018: PeerJ
https://www.readbyqxmd.com/read/29682413/can-phosphorus-application-and-cover-cropping-alter-arbuscular-mycorrhizal-fungal-communities-and-soybean-performance-after-a-five-year-phosphorus-unfertilized-crop-rotational-system
#19
Masao Higo, Ryohei Sato, Ayu Serizawa, Yuichi Takahashi, Kento Gunji, Yuya Tatewaki, Katsunori Isobe
Background: Understanding diversity of arbuscular mycorrhizal fungi (AMF) is important for optimizing their role for phosphorus (P) nutrition of soybeans ( Glycine max (L.) Merr.) in P-limited soils. However, it is not clear how soybean growth and P nutrition is related to AMF colonization and diversity of AMF communities in a continuous P-unfertilized cover cropping system. Thus, we investigated the impact of P-application and cover cropping on the interaction among AMF colonization, AMF diversity in soybean roots, soybean growth and P nutrition under a five-year P-unfertilized crop rotation...
2018: PeerJ
https://www.readbyqxmd.com/read/29677596/vanadium-toxicity-in-chickpea-cicer-arietinum-l-grown-in-red-soil-effects-on-cell-death-ros-and-antioxidative-systems
#20
Muhammad Imtiaz, Muhammad Ashraf, Muhammad Shahid Rizwan, Muhammad Amjad Nawaz, Muhammad Rizwan, Sajid Mehmood, Balal Yousaf, Yuan Yuan, Allah Ditta, Muhammad Ali Mumtaz, Muhammad Ali, Sammina Mahmood, Shuxin Tu
The agricultural soil contaminated with heavy metals induces toxic effects on plant growth. The present study was conducted to evaluate the effects of vanadium (V) on growth, H2 O2 and enzyme activities, cell death, ion leakage, and at which concentration; V induces the toxic effects in chickpea plants grown in red soil. The obtained results indicated that the biomass (fresh and dry) and lengths of roots and shoots were significantly decreased by V application, and roots accumulated more V than shoots. The enzyme activities (SOD, CAT, and POD) and ion leakage were increased linearly with increasing V concentrations...
April 17, 2018: Ecotoxicology and Environmental Safety
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