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https://www.readbyqxmd.com/read/28110460/ability-of-rf5-and-rf6-to-restore-fertility-of-chinsurah-boro-ii-type-cytoplasmic-male-sterile-oryza-sativa-ssp-japonica-lines
#1
Honggen Zhang, Jianlan Che, Yongshen Ge, Yan Pei, Lijia Zhang, Qiaoquan Liu, Minghong Gu, Shuzhu Tang
BACKGROUND: Three-line Oryza sativa (ssp. japonica) hybrids have been developed mainly using Chinsurah Boro II (BT)-type cytoplasmic male sterility (CMS). The Rf1 gene restores the fertility of BT-type CMS lines, and is the only fertility restorer gene (Rf) that has been used to produce three-line japonica hybrids. Using more Rf genes to breed BT-type restorer lines may broaden the genetic diversity of the restorer lines, and represents a viable approach to improve the heterosis level of BT-type japonica hybrids...
December 2017: Rice
https://www.readbyqxmd.com/read/28110414/expression-of-the-citrus-cstip2-1-gene-improves-tobacco-plant-growth-antioxidant-capacity-and-physiological-adaptation-under-stress-conditions
#2
Cristina P S Martins, Diana M Neves, Luciana C Cidade, Amanda F S Mendes, Delmira C Silva, Alex-Alan F Almeida, Mauricio A Coelho-Filho, Abelmon S Gesteira, Walter S Soares-Filho, Marcio G C Costa
Overexpression of the citrus CsTIP2;1 improves plant growth and tolerance to salt and drought stresses by enhancing cell expansion, H 2 O 2 detoxification and stomatal conductance. Tonoplast intrinsic proteins (TIPs) are a subfamily of aquaporins, belonging to the major intrinsic protein family. In a previous study, we have shown that a citrus TIP isoform, CsTIP2;1, is highly expressed in leaves and also transcriptionally regulated in leaves and roots by salt and drought stresses and infection by 'Candidatus Liberibacter asiaticus', the causal agent of the Huanglongbing disease, suggesting its involvement in the regulation of the flow of water and nutrients required during both normal growth and stress conditions...
January 21, 2017: Planta
https://www.readbyqxmd.com/read/28110375/hepatitis-e-virus-genotype-4-sequences-detected-in-sewage-from-treatment-plants-of-china
#3
Heng Li, Wei Li, Ruiping She, Liang Yu, Qiaoxing Wu, Jingling Yang, Fengjiao Hu, Majid Hussain Soomro, Ruihan Shi, Wenzhuo Hao, Yue Zhao, Jingjing Mao
The aim of this study was to investigate the occurrence of hepatitis E virus (HEV) in sewage samples in Shen Zhen, China. Sewage samples were collected from 152 sewage plants including livestock sewage, domestic sewage and treated sewage from May to July of 2015. Two of 152 samples were HEV positive (1.32%) from the livestock sewage plants. Partial ORF2 fragments of HEV were sequenced and a phylogenetic tree was constructed using MEGA5.1. Blast and phylogenetic analyses showed that both of these two sequences belonged to HEV Genotype 4...
January 21, 2017: Food and Environmental Virology
https://www.readbyqxmd.com/read/28110339/the-effect-of-homoeologous-meiotic-pairing-in-tetraploid-hordeum-bulbosum-l-%C3%A3-h-vulgare-l-hybrids-on-alien-introgressions-in-offspring
#4
Margret Scholz, Galina Pendinen
The pairing behaviour of the individual chromosome arms of Hordeum vulgare (Hv) with their homoeologous arms of H. bulbosum (Hb) at metaphase I of meiosis in tetraploid Hb × Hv hybrids and the frequencies of recombined Hv chromosome arms in selfed offspring were studied on differentially visualized chromosomes after fluorescent in situ hybridisation. The frequencies of paired Hv-Hb arms in the F2 and F3 hybrids were correlated with the frequencies of recombined Hv chromosomes in progenies. Self-generation of hybrids, the number of Hv and Hb chromosomes, and the number of recombined Hv chromosomes of the hybrids strongly influenced the Hv-Hb pairing frequency in meiosis...
January 21, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28110279/walking-the-c4-pathway-past-present-and-future
#5
REVIEW
Robert T Furbank
The year 2016 marks 50 years since the publication of the seminal paper by Hatch and Slack describing the biochemical pathway we now know as C4 photosynthesis. This review provides insight into the initial discovery of this pathway, the clues which led Hatch and Slack and others to these definitive experiments, some of the intrigue which surrounds the international activities which led up to the discovery, and personal insights into the future of this research field. While the biochemical understanding of the basic pathways came quickly, the role of the bundle sheath intermediate CO2 pool was not understood for a number of years, and the nature of C4 as a biochemical CO2 pump then linked the unique Kranz anatomy of C4 plants to their biochemical specialization...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110278/a-portrait-of-the-c4-photosynthetic-family-on-the-50th-anniversary-of-its-discovery-species-number-evolutionary-lineages-and-hall-of-fame
#6
REVIEW
Rowan F Sage
Fifty years ago, the C4 photosynthetic pathway was first characterized. In the subsequent five decades, much has been learned about C4 plants, such that it is now possible to place nearly all C4 species into their respective evolutionary lineages. Sixty-one independent lineages of C4 photosynthesis are identified, with additional, ancillary C4 origins possible in 12 of these principal lineages. The lineages produced ~8100 C4 species (5044 grasses, 1322 sedges, and 1777 eudicots). Using midpoints of stem and crown node dates in their respective phylogenies, the oldest and most speciose C4 lineage is the grass lineage Chloridoideae, estimated to be near 30 million years old...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110277/loss-of-photosynthetic-efficiency-in-the-shade-an-achilles-heel-for-the-dense-modern-stands-of-our-most-productive-c4-crops
#7
Charles P Pignon, Deepak Jaiswal, Justin M McGrath, Stephen P Long
The wild progenitors of major C4 crops grew as individuals subjected to little shading. Today they are grown in dense stands where most leaves are shaded. Do they maintain photosynthetic efficiency in these low light conditions produced by modern cultivation? The apparent maximum quantum yield of CO2 assimilation (ΦCO2max,app), a key determinant of light-limited photosynthesis, has not been systematically studied in field stands of C4 crops. ΦCO2max,app was derived from the initial slope of the response of leaf CO2 uptake (A) to photon flux (Q)...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110276/photosynthesis-in-c3-c4-intermediate-moricandia-species
#8
Urte Schlüter, Andrea Bräutigam, Udo Gowik, Michael Melzer, Pascal-Antoine Christin, Samantha Kurz, Tabea Mettler-Altmann, Andreas Pm Weber
Evolution of C4 photosynthesis is not distributed evenly in the plant kingdom. Particularly interesting is the situation in the Brassicaceae, because the family contains no C4 species, but several C3-C4 intermediates, mainly in the genus Moricandia Investigation of leaf anatomy, gas exchange parameters, the metabolome, and the transcriptome of two C3-C4 intermediate Moricandia species, M. arvensis and M. suffruticosa, and their close C3 relative M. moricandioides enabled us to unravel the specific C3-C4 characteristics in these Moricandia lines...
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110275/traces-of-strong-selective-pressures-in-the-genomes-of-c4-grasses
#9
Pascal-Antoine Christin
C4 photosynthesis is nature's response to CO2 limitations, and evolved recurrently in several groups of plants. To identify genes related to C4 photosynthesis, Huang et al. looked for evidence of past episodes of adaptive evolution in the genomes of C4 grasses. They identified a large number of candidate genes that evolved under divergent selection, indicating that, besides alterations to expression patterns, the history of C4 involved strong selection on protein-coding sequences.
January 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28110268/metabolic-and-physiological-adjustment-of-suaeda-maritima-to-combined-salinity-and-hypoxia
#10
Jan H Behr, Alain Bouchereau, Solenne Berardocco, Charlotte E Seal, Timothy J Flowers, Christian Zörb
BACKGROUND AND AIMS: Suaeda maritima is a halophyte commonly found on coastal wetlands in the intertidal zone. Due to its habitat S. maritima has evolved tolerance to high salt concentrations and hypoxic conditions in the soil caused by periodic flooding. In the present work, the adaptive mechanisms of S. maritima to salinity combined with hypoxia were investigated on a physiological and metabolic level. METHODS: To compare the adaptive mechanisms to deficient, optimal and stressful salt concentrations, S...
January 20, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28110257/acidification-with-nitric-acid-improves-chemical-characteristics-and-reduces-phytotoxicity-of-alkaline-chars
#11
Fernando Fornes, Rosa Maria Belda
Charred organic matter is recently receiving attention for its potential use as soilless growth medium. However, depending on its origin and on the manufacturing technology, it can result toxic for plants. This fact implies that a detoxifying treatment ought to be devised in order to reclaim char in this way. We have studied three materials which combine these factors: two pyrolyzed biochars, one from forest waste (BCH-FW) and another from olive mill waste (BCH-OMW), and one hydrothermally carbonized hydrochar from forest waste (HYD-FW)...
January 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28110212/effects-of-hydrochemistry-variables-on-the-half-life-of-mancozeb-and-on-the-hazard-index-associated-to-the-sum-of-mancozeb-and-ethylenethiourea
#12
O López-Fernández, E Pose-Juan, R Rial-Otero, J Simal-Gándara
Mancozeb is a dithiocarbamate non-systemic agricultural fungicide with multi-site, protective action. It helps to control many fungal diseases in a wide range of field crops, fruits, nuts, vegetables, and ornamental plants. We have investigated the stability profiles of mancozeb in aqueous solutions to determine the effect of pH, temperature and light on the degradation process of mancozeb. In addition, the toxicological risk for humans associated with the joint intake of mancoze7b and its final degradation product, ethylenethiourea (ETU), was calculated and modelled as a function of the experimental conditions...
January 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28110201/influence-of-soil-types-and-osmotic-pressure-on-growth-and-137-cs-accumulation-in-blackgram-vigna-mungo-l
#13
Khin Thuzar Win, Aung Zaw Oo, Sonoko Dorothea Bellingrath-Kimura
A pot experiment was conducted to study the effects of soil types and osmotic levels on growth and (137)Cs accumulation in two blackgram varieties differing in salinity tolerance grown in Fukushima contaminated soils. The contamination levels of the sandy clay loam and clay soil were 1084 and 2046 Bq kg(-1) DW, respectively. The (137)Cs activity was higher in both plants grown on the sandy clay loam than on the clay soil regardless of soil (137)Cs activity concentration. No significant differences were observed in all measured growth parameters between the two varieties under optimal water conditions for both types of soil...
January 19, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28110200/soil-soil-solution-distribution-coefficient-of-soil-organic-matter-is-a-key-factor-for-that-of-radioiodide-in-surface-and-subsurface-soils
#14
Yusuke Unno, Hirofumi Tsukada, Akira Takeda, Yuichi Takaku, Shun'ichi Hisamatsu
We investigated the vertical distribution of the soil-soil-solution distribution coefficients (Kd) of (125)I, (137)Cs, and (85)Sr in organic-rich surface soil and organic-poor subsurface soil of a pasture and an urban forest near a spent-nuclear-fuel reprocessing plant in Rokkasho, Japan. Kd of (137)Cs was highly correlated with water-extractable K(+). Kd of (85)Sr was highly correlated with water-extractable Ca(2+) and SOC. Kd of (125)I(-) was low in organic-rich surface soil, high slightly below the surface, and lowest in the deepest soil...
January 19, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28110191/asiatic-acid-enhances-nrf2-signaling-to-protect-hepg2-cells-from-oxidative-damage-through-akt-and-erk-activation
#15
Zhimin Qi, Xinxin Ci, Jingbo Huang, Qinmei Liu, Qinlei Yu, Junfeng Zhou, Xuming Deng
Asiatic acid (AA), a natural triterpene isolated from the plant Centella asiatica, have antioxidative potential, but the molecular mechanism of AA against oxidative stress remains unclear. Our study was performed to investigate the antioxidative effect of AA against oxidative stress and the antioxidative mechanism in tert-butyl hydroperoxide (t-BHP) -stimulated the HepG2 cells. The results showed that AA suppressed t-BHP-induced cytotoxicity, apoptosis, and reactive oxygen species (ROS) generation. Additionally, AA activated the nuclear factor erythroid 2-related factor 2 (Nrf2) signal, which was closely related to induction Nrf2 nuclear translocation, reduction the expression of Keap1 and up-regulation the activity of the antioxidant response element (ARE)...
January 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28110189/anticancer-activity-of-baicalein-and-luteolin-studied-in-colorectal-adenocarcinoma-lovo-cells-and-in-drug-resistant-lovo-dx-cells
#16
Anna Palko-Labuz, Kamila Sroda-Pomianek, Anna Uryga, Edyta Kostrzewa-Suslow, Krystyna Michalak
Due to the type-specific diversity of cancer cells, an analysis and elucidation of molecular mechanisms responsible for anticancer properties of biologically active compounds are essential. Plant-derived polyphenolic compounds such as flavonoids may be useful in cancer chemoprevention or treatment because they influence diverse molecular pathways in cancer cells. In these studies anticancer activity of natural occurring flavones, baicalein and luteolin was investigated in colon cancer cells LoVo and in their drug resistant subline LoVo/Dx...
January 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28110149/treatment-of-model-and-galvanic-waste-solutions-of-copper-ii-ions-using-a-lignin-inorganic-oxide-hybrid-as-an-effective-sorbent
#17
Filip Ciesielczyk, Przemysław Bartczak, Łukasz Klapiszewski, Teofil Jesionowski
A study was made concerning the removal of copper(II) ions from model and galvanic waste solutions using a new sorption material consisting of lignin in combination with an inorganic oxide system. Specific physicochemical properties of the material resulted from combining the activity of the functional groups present in the structure of lignin with the high surface area of the synthesized oxide system (585m(2)/g). Analysis of the porous structure parameters, particle size and morphology, elemental composition and characteristic functional groups confirmed the effective synthesis of the new type of sorbent...
January 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28110148/ciprofloxacin-induces-oxidative-stress-in-duckweed-lemna-minor-l-implications-for-energy-metabolism-and-antibiotic-uptake-ability
#18
Marcelo Pedrosa Gomes, Cíntia Almeida Gonçalves, Júlio César Moreira de Brito, Amanda Miranda Souza, Fernanda Vieira da Silva Cruz, Elisa Monteze Bicalho, Cleber Cunha Figueredo, Queila Souza Garcia
We investigate the physiological responses and antibiotic-uptake capacity of Lemna minor exposed to ciprofloxacin. Ciprofloxacin (Cipro) induced toxic effects and hormesis in plants by significantly modifying photosynthesis and respiration pathways. A toxic effect was induced by a concentration ≥1.05mg ciprofloxacin l(-1) while hormesis occurs at the lowest concentration studied (0.75mg ciprofloxacin l(-1)). By impairing normal electron flow in the respiratory electron transport chain, ciprofloxacin induces hydrogen peroxide (H2O2) production...
January 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28110143/non-denitrifying-polyphosphate-accumulating-organisms-obviate-requirement-for-anaerobic-condition
#19
A Anisa Cokro, Yingyu Law, Rohan B H Williams, Yeshi Cao, Per H Nielsen, Stefan Wuertz
Enhanced biological phosphorus removal (EBPR) is a widely used process in wastewater treatment that requires anaerobic/aerobic or anaerobic/anoxic cycling. Surprisingly, phosphorus (P) release was observed in the presence of nitrate in the anoxic compartment of the activated sludge tank in a full-scale treatment plant with the Modified Ludzack Ettinger configuration. We therefore studied the potential of this full-scale activated sludge community to perform EBPR under anoxic/aerobic cycling. The polyphosphate accumulating organism (PAO) Candidatus Accumulibacter represented 3...
January 3, 2017: Water Research
https://www.readbyqxmd.com/read/28110142/characteristics-of-water-obtained-by-dewatering-cyanobacteria-containing-sludge-formed-during-drinking-water-treatment-including-c-n-disinfection-byproduct-formation
#20
Hangzhou Xu, Haiyan Pei, Yan Jin, Hongdi Xiao, Chunxia Ma, Jiongming Sun, Hongmin Li
This is the first study to systematically investigate the characteristics of the water obtained by dewatering cyanobacteria-containing sludge generated in the drinking water treatment plant, including formation of C- and N-disinfection by-products (DBPs). Results showed that this 'dewatering water' (DW) had different properties when the sludge was stored at different times. The content of dissolved organic matter (DOM) and microcystins (MCs) in the DW were low when the sludge was treated or disposed of within 4 days; correspondingly, the C-, N-DBP production was also low...
January 13, 2017: Water Research
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