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https://www.readbyqxmd.com/read/28340032/osptr7-osnpf8-1-a-putative-peptide-transporter-in-rice-is-involved-in-dimethylarsenate-accumulation-in-rice-grain
#1
Zhong Tang, Yi Chen, Fei Chen, Yuchen Ji, Fang-Jie Zhao
Rice (Oryza sativa) is a major dietary source of arsenic (As) for the population consuming rice as their staple food. Rice grain contains both inorganic As and methylated As species, especially dimethyarsinate (DMA). DMA is highly mobile in long-distance translocation in plants, but the underlying mechanism remains unknown. In the present study, we showed that OsPTR7 (OsNPF8.1), a putative peptide transporter in rice, was permeable to DMA in Xenopus laevis oocytes. Transient expression of the OsPTR7-green fluorescent protein (GFP) in tobacco protoplasts showed that OsPTR7 was localized in the cell plasma membrane...
March 2, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28338712/molecular-mechanisms-of-flowering-under-long-days-and-stem-growth-habit-in-soybean
#2
Dong Cao, Ryoma Takeshima, Chen Zhao, Baohui Liu, Abe Jun, Fanjiang Kong
Precise timing of flowering is critical to crop adaptation and productivity in a given environment. A number of classical E genes controlling flowering time and maturity have been identified in soybean [Glycine max (L.) Merr.]. The public availability of the soybean genome sequence has accelerated the identification of orthologues of Arabidopsis flowering genes and their functional analysis, and has allowed notable progress towards understanding the molecular mechanisms of flowering in soybean. Great progress has been made particularly in identifying genes and modules that inhibit flowering in long-day conditions, because a reduced or absent inhibition of flowering by long daylengths is an essential trait for soybean, a short-day (SD) plant, to expand its adaptability toward higher latitude environments...
October 20, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28337762/molecular-interaction-between-pho2-and-gi-in-rice
#3
Shuai Li, Yinghui Ying, David Secco, Chuang Wang, Reena Narsai, James Whelan, Huixia Shou
Plants are often confronted to nutrient limiting conditions, such as inorganic phosphate (Pi) deficiency, resulting in a reduction in growth and yield. PHO2, encoding a ubiquitin-conjugating E2 enzyme, is a central component of the Pi-starvation response signaling pathway. A yeast-two-hybrid screen using Oryza sativa (rice) PHO2 as bait, revealed an interaction between OsPHO2 and OsGIGANTEA, a key regulator of flowering time, which was confirmed using bimolecular flourescenec complementation (BiFC). Characterization of rice Osgi and Ospho2 mutants revealed that they displayed several similar phenotypic features supporting a physiological role for this interaction...
March 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28336897/three-dimensional-bioi-biox-x-cl-or-br-nanohybrids-for-enhanced-visible-light-photocatalytic-activity
#4
Yazi Liu, Jian Xu, Liqiong Wang, Huayang Zhang, Ping Xu, Xiaoguang Duan, Hongqi Sun, Shaobin Wang
Three-dimensional flower-like BiOI/BiOX (X = Br or Cl) hybrids were synthesized via a facile one-pot solvothermal approach. With systematic characterizations by X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), the Brunauer-Emmett-Teller (BET)specific surface area, X-ray photoelectron spectroscopy (XPS), and the UV-Vis diffuse reflectance spectra (DRS), the BiOI/BiOCl composites showed a fluffy and porous 3-D architecture with a large specific surface area (SSA) and high capability for light absorption...
March 14, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28335757/sophorae-flos-extract-inhibits-rankl-induced-osteoclast-differentiation-by-suppressing-the-nf-%C3%AE%C2%BAb-nfatc1-pathway-in-mouse-bone-marrow-cells
#5
Jeong-Mi Kim, Jung-Han Lee, Guem-San Lee, Eun-Mi Noh, Hyun-Kyung Song, Dong Ryun Gu, Seong-Cheol Kim, Seoung Hoon Lee, Kang-Beom Kwon, Young-Rae Lee
BACKGROUND: Sophorae Flos (SF) is a composite of flowers and buds of Styphnolobium japonicum (L.) Schott and has been used in traditional Korean and Chinese medicine for the treatment of hemostasis and inflammation. Previous studies reported that SF possesses anti-obesity properties, as well as anti-allergic, anti-proliferative, and anti-inflammatory activities. However, the effect of SF in bone resorption has not been studies. In this study, we examined the potential of SF extract (SFE) to inhibit receptor activator of NF-κB ligand (RANKL) -induced osteoclast differentiation in cultured mouse-derived bone marrow macrophages (BMMs)...
March 23, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28335368/shape-evolution-of-hierarchical-w18o49-nanostructures-a-systematic-investigation-of-the-growth-mechanism-properties-and-morphology-dependent-photocatalytic-activities
#6
Guojuan Hai, Jianfeng Huang, Liyun Cao, Yanni Jie, Jiayin Li, Xing Wang
Hierarchical tungsten oxide assemblies such as spindle-like structures, flowers with sharp petals, nanowires and regular hexagonal structures are successfully synthesized via a solvothermal reduction method by simply adjusting the reaction conditions. On the basis of the experimental results, it is determined that the reaction time significantly influences the phase transition, microstructure and photocatalytic activity of the prepared samples. The possible mechanisms for the morphology evolution process have been systematically proposed...
December 14, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333943/fabrication-of-sensitive-enzymatic-biosensor-based-on-multi-layered-reduced-graphene-oxide-added-ptau-nanoparticles-modified-hybrid-electrode
#7
Md Faruk Hossain, Jae Y Park
A highly sensitive amperometric glucose sensor was developed by immobilization of glucose oxidase (GOx) onto multi-layer reduced graphene oxide (MRGO) sheets decorated with platinum and gold flower-like nanoparticles (PtAuNPs) modified Au substrate electrode. The fabricated MRGO/PtAuNPs modified hybrid electrode demonstrated high electrocatalytic activities toward oxidation of H2O2, to which it had a wide linear response that ranged from 0.5 to 8 mM (R2 = 0.997), and high sensitivity of 506.25 μA/mMcm2. Furthermore, glucose oxidase-chitosan composite and cationic polydiallyldimethylammonium chloride (PDDA) were assembled by a casting method on the surface of MRGO/PtAuNPs modified electrode...
2017: PloS One
https://www.readbyqxmd.com/read/28333233/contrasting-rates-of-molecular-evolution-and-patterns-of-selection-among-gymnosperms-and-flowering-plants
#8
Amanda R De La Torre, Zhen Li, Yves Van de Peer, Pär K Ingvarsson
The majority of variation in rates of molecular evolution among seed plants remains both unexplored and unexplained. Although some attention has been given to flowering plants, reports of molecular evolutionary rates for their sister plant clade (gymnosperms) are scarce, and to our knowledge differences in molecular evolution among seed plant clades have never been tested in a phylogenetic framework. Angiosperms and gymnosperms differ in a number of features, of which contrasting reproductive biology, life spans, and population sizes are the most prominent...
February 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28331597/pollinator-population-size-and-pollination-ecosystem-service-responses-to-enhancing-floral-and-nesting-resources
#9
Johanna Häussler, Ullrika Sahlin, Charlotte Baey, Henrik G Smith, Yann Clough
Modeling pollination ecosystem services requires a spatially explicit, process-based approach because they depend on both the behavioral responses of pollinators to the amount and spatial arrangement of habitat and on the within- and between-season dynamics of pollinator populations in response to land use. We describe a novel pollinator model predicting flower visitation rates by wild central-place foragers (e.g., nesting bees) in spatially explicit landscapes. The model goes beyond existing approaches by: (1) integrating preferential use of more rewarding floral and nesting resources; (2) considering population growth over time; (3) allowing different dispersal distances for workers and reproductives; (4) providing visitation rates for use in crop pollination models...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28330561/functional-characterization-of-a-novel-brassica-leafy-homolog-from-indian-mustard-expression-pattern-and-gain-of-function-studies
#10
Priyanka Dhakate, Shikha Tyagi, Anupama Singh, Anandita Singh
LEAFY plays a central role in regulation of flowering time and floral meristem identity in plants. Unfortunately, LFY function remains uncharacterized in agronomicaly important Brassicas. Herein, we illustrate fine-mapping of expression domains of LFY in 15 cultivars of 6 Brassica species and describe gain-of-function phenotypes in Arabidopsis and Brassica. We depict early flowering and altered fatty-acid composition in transgenic seed. The cDNA encoding BjuLFY (417aa) shared only 85% identity with reported homolog of B...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28330558/altered-expression-of-polyamine-transporters-reveals-a-role-for-spermidine-in-the-timing-of-flowering-and-other-developmental-response-pathways
#11
Sheaza Ahmed, Menaka Ariyaratne, Jigar Patel, Alexander E Howard, Andrea Kalinoski, Vipaporn Phuntumart, Paul F Morris
Changes in the levels of polyamines are correlated with the activation or repression of developmental response pathways, but the role of polyamine transporters in the regulation of polyamine homeostasis and thus indirectly gene expression, has not been previously addressed. Here we show that the A. thaliana and rice transporters AtPUT5 and OsPUT1 were localized to the ER, while the AtPUT2, AtPUT3, and OsPUT3 were localized to the chloroplast by transient expression in N. benthamiana. A. thaliana plants that were transformed with OsPUT1 under the control the PUT5 promoter were delayed in flowering by 16days...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28323890/establishment-of-transient-gene-expression-systems-in-protoplasts-from-liriodendron-hybrid-mesophyll-cells
#12
Ailing Huo, Zhenyu Chen, Pengkai Wang, Liming Yang, Guangping Wang, Dandan Wang, Suchan Liao, Tielong Cheng, Jinhui Chen, Jisen Shi
Liriodendron is a genus of the magnolia family comprised of two flowering tree species that produce hardwoods of great ecological and economic value. However, only a limited amount of genetic research has been performed on the Liriodendron genus partly because transient or stable transgenic trees have been difficult to produce. In general, transient expression systems are indispensable for rapid, high-throughput screening and systematic characterization of gene functions at a low cost; therefore, development of such a system for Liriodendron would provide a necessary step forward for research on Magnoliaceae and other woody trees...
2017: PloS One
https://www.readbyqxmd.com/read/28323862/is-floral-structure-a-reliable-indicator-of-breeding-system-in-the-brassicaceae
#13
Phillip A Salisbury, Yvonne J Fripp, Allison M Gurung, Warren M Williams
This study investigated the usefulness of floral characters as a potential indicator of breeding system in the Brassicaceae. Initially, pod set, seed set and pollen tube growth experiments were carried out to confirm the breeding systems of 53 lines representing 25 different cultivated and weedy species from the Brassicaceae. The results of the pod set tests clearly differentiated between self-compatible and self-incompatible species. Floral characters were then evaluated on one or more lines of each of the 25 species...
2017: PloS One
https://www.readbyqxmd.com/read/28322995/a-putative-12-oxophytodienoate-reductase-gene-csopr3-from-camellia-sinensis-is-involved-in-wound-and-herbivore-infestation-responses
#14
Zhaojun Xin, Jin Zhang, Lingang Ge, Shu Lei, Juanjuan Han, Xin Zhang, Xiwang Li, Xiaoling Sun
12-Oxophytodienoate reductase (OPR) is a key enzyme in the biosynthesis of jasmonic acid (JA), which plays an important role in plant defense responses. Although multiple isoforms of OPRs have been identified in various annual herbaceous plants, genes encoding these enzymes in perennial woody plants have yet to be fully investigated. In the tea plant, Camellia sinensis (L.), no OPR genes have been isolated, and their possible roles in tea plant development and defense mechanism remain unknown. In this study, a putative OPR gene, designated as CsOPR3, was isolated from tea plants for the first time through the rapid amplification of cDNA ends...
March 16, 2017: Gene
https://www.readbyqxmd.com/read/28320315/comparative-transcriptome-analyses-of-flower-development-in-four-species-of-achimenes-gesneriaceae
#15
Wade R Roberts, Eric H Roalson
BACKGROUND: Flowers have an amazingly diverse display of colors and shapes, and these characteristics often vary significantly among closely related species. The evolution of diverse floral form can be thought of as an adaptive response to pollination and reproduction, but it can also be seen through the lens of morphological and developmental constraints. To explore these interactions, we use RNA-seq across species and development to investigate gene expression and sequence evolution as they relate to the evolution of the diverse flowers in a group of Neotropical plants native to Mexico-magic flowers (Achimenes, Gesneriaceae)...
March 20, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28319089/natural-variation-at-the-soybean-j-locus-improves-adaptation-to-the-tropics-and-enhances-yield
#16
Sijia Lu, Xiaohui Zhao, Yilong Hu, Shulin Liu, Haiyang Nan, Xiaoming Li, Chao Fang, Dong Cao, Xinyi Shi, Lingping Kong, Tong Su, Fengge Zhang, Shichen Li, Zheng Wang, Xiaohui Yuan, Elroy R Cober, James L Weller, Baohui Liu, Xingliang Hou, Zhixi Tian, Fanjiang Kong
Soybean is a major legume crop originating in temperate regions, and photoperiod responsiveness is a key factor in its latitudinal adaptation. Varieties from temperate regions introduced to lower latitudes mature early and have extremely low grain yields. Introduction of the long-juvenile (LJ) trait extends the vegetative phase and improves yield under short-day conditions, thereby enabling expansion of cultivation in tropical regions. Here we report the cloning and characterization of J, the major classical locus conferring the LJ trait, and identify J as the ortholog of Arabidopsis thaliana EARLY FLOWERING 3 (ELF3)...
March 20, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28315232/land-use-change-in-indian-tropical-agro-ecosystems-eco-energy-estimation-for-socio-ecological-sustainability
#17
Sunil Nautiyal, Harald Kaechele, M S Umesh Babu, Pavan Tikhile, Sangeeta Baksi
This study was carried out to understand the ecological and economic sustainability of floriculture and other main crops in Indian agro-ecosystems. The cultivation practices of four major flower crops, namely Jasminum multiflorum, Crossandra infundibuliformis, Chrysanthemum and Tagetes erecta, were studied in detail. The production cost of flowers in terms of energy was calculated to be 99,622-135,996 compared to 27,681-69,133 MJ ha(-1) for the main crops, namely Oryza sativa, Eleusine coracana, Zea mays and Sorghum bicolor...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28314998/multispectral-images-of-flowers-reveal-the-adaptive-significance-of-using-long-wavelength-sensitive-receptors-for-edge-detection-in-bees
#18
Vera Vasas, Daniel Hanley, Peter G Kevan, Lars Chittka
Many pollinating insects acquire their entire nutrition from visiting flowers, and they must therefore be efficient both at detecting flowers and at recognizing familiar rewarding flower types. A crucial first step in recognition is the identification of edges and the segmentation of the visual field into areas that belong together. Honeybees and bumblebees acquire visual information through three types of photoreceptors; however, they only use a single receptor type-the one sensitive to longer wavelengths-for edge detection and movement detection...
March 17, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28314937/phylogenetic-analysis-of-idd-gene-family-and-characterization-of-its-expression-in-response-to-flower-induction-in-malus
#19
Sheng Fan, Dong Zhang, Libo Xing, Siyan Qi, Lisha Du, Haiqin Wu, Hongxia Shao, Youmei Li, Juanjuan Ma, Mingyu Han
Although INDETERMINATE DOMAIN (IDD) genes encoding specific plant transcription factors have important roles in plant growth and development, little is known about apple IDD (MdIDD) genes and their potential functions in the flower induction. In this study, we identified 20 putative IDD genes in apple and named them according to their chromosomal locations. All identified MdIDD genes shared a conserved IDD domain. A phylogenetic analysis separated MdIDDs and other plant IDD genes into four groups. Bioinformatic analysis of chemical characteristics, gene structure, and prediction of protein-protein interactions demonstrated the functional and structural diversity of MdIDD genes...
March 17, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28303594/the-analysis-of-the-different-functions-of-starch-phosphorylating-enzymes-during-the-development-of-arabidopsis-thaliana-plants-discloses-an-unexpected-role-for-the-cytosolic-isoform-gwd2
#20
Claudia Pirone, Libero Gurrieri, Ivan Gaiba, Alessio Adamiano, Francesco Valle, Paolo Trost, Francesca Sparla
The genome of Arabidopsis thaliana encodes three glucan, water dikinases. Glucan, water dikinase 1 (GWD1; EC 2.7.9.4) and phosphoglucan, water dikinase (PWD; EC 2.7.9.5) are chloroplastic enzymes, while glucan, water dikinase 2 (GWD2) is cytosolic. Both GWDs and PWD catalyze the addition of phosphate groups to amylopectin chains at the surface of starch granules, changing its physicochemical properties. As a result, GWD1 and PWD have a positive effect on transitory starch degradation at night. Because of its cytosolic localization, GWD2 does not have the same effect...
March 17, 2017: Physiologia Plantarum
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