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https://www.readbyqxmd.com/read/29667605/hierarchical-layered-double-hydroxides-with-ag-nanoparticles-modification-for-ethanol-sensing
#1
Yuxiang Qin, Liping Wang, Xiaofei Wang
Layered double hydroxides (LDHs) are recently revealed to be promising in gas sensor application due to compositional flexibility and unique 2D-interlayer channel for gas diffusion and adsorption. This work demonstrates a kind of highly porous hierarchical LDHs containing Mg2+ and Al3+ (MgAl-LDHs) for ethanol-sensing at room temperature. The MgAl-LDHs with unique flower-like hierarchical structure and mesoporous interlayer were synthesized hydrothermally using sodium dodecyl sulfate (SDS) as soft template as well as intercalating agent...
April 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29667268/a-molecular-network-for-functional-versatility-of-hecate-transcription-factors
#2
Christophe Gaillochet, Suraj Jamge, Froukje van der Wal, Gerco Angenent, Richard Immink, Jan U Lohmann
During the plant life cycle, diverse signalling inputs are continuously integrated and engage specific genetic programs depending on the cellular or developmental context. Consistent with an important role in this process, HECATE (HEC) bHLH transcription factors display diverse functions, from photomorphogenesis to the control of shoot meristem dynamics and gynoecium patterning. However, the molecular mechanisms underlying their functional versatility and the deployment of specific HEC sub-programs still remain elusive...
April 18, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29667247/the-nuclear-factor-constans-complex-antagonizes-polycomb-repression-to-de-repress-flowering-locus-t-expression-in-response-to-inductive-long-days-in-arabidopsis
#3
Xiao Luo, Zheng Gao, Yizhong Wang, Zhijuan Chen, Wenju Zhang, Jirong Huang, Hao Yu, Yuehui He
Many plants sense the seasonal cues, day length or photoperiod changes, to align the timing of the developmental transition to flowering with changing seasons for reproductive success. Inductive day lengths through the photoperiod pathway induces the expression of FLOWERING LOCUS T (FT) or FT relatives that encode a major mobile florigen to promote flowering. In Arabidopsis thaliana, under inductive long days the photoperiod pathway output CONSTANS (CO) accumulates toward the end of the day and associates with the B and C subunits of Nuclear Factor Y (NF-Y) to form the NF-CO complex that acts to promote FT expression near dusk, whereas Polycomb group (PcG) proteins function to silence FT expression...
April 18, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29667236/recent-advances-in-matrix-assisted-laser-desorption-ionisation-mass-spectrometry-imaging-maldi-msi-for-in-situ-analysis-of-endogenous-molecules-in-plants
#4
Liang Qin, Yawen Zhang, Yaqin Liu, Huixin He, Manman Han, Yanyan Li, Maomao Zeng, Xiaodong Wang
INTRODUCTION: Mass spectrometry imaging (MSI) as a label-free and powerful imaging technique enables in situ evaluation of a tissue metabolome and/or proteome, becoming increasingly popular in the detection of plant endogenous molecules. OBJECTIVE: The characterization of structure and spatial information of endogenous molecules in plants are both very important aspects to better understand the physiological mechanism of plant organism. METHODS: Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) is a commonly-used tissue imaging technique, which requires matrix to assist in situ detection of a variety of molecules on the surface of a tissue section...
April 17, 2018: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29666353/inheritance-of-carthamin-and-carthamidin-in-safflower-carthamus-tinctorius-l
#5
Pooran Golkar
The safflower (Carthamus tinctorius L.) is an oil seed crop from which the flowers is used as medicine and food colorants. The present investigation was undertaken to explore gene effects for safflower's pigments in flower including carthamin and carthamidin. Six generation including P1 , P2 , F1 , F2 , BC1 and BC2 that derived from two different crosses (Mex. 2-138 (P2 ) × Wht-Esf (P1 ) and C111 (P2 ) × Wht-Esf (P1 ) were used for generation of mean analysis. The joint scaling test showed that additive [a], additive × additive [aa], and additive × dominance [ad] effects were significant for genetic control of carthamin and carthamidin in both crosses...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29665737/increased-synthesis-of-a-new-oleanane-type-saponin-in-hairy-roots-of-marigold-calendula-officinalis-after-treatment-with-jasmonic-acid
#6
Michał Markowski, Marek Długosz, Anna Szakiel, Mathieu Durli, Sophie Poinsignon, Sabine Bouguet-Bonnet, Lionel Vernex-Loset, Gabriel Krier, Max Henry
Native plant of marigold (Calendula officinalis L.) synthesizes oleanolic acid saponins classified as glucosides or glucuronides according to the first residue in sugar chain bound to C-3 hydroxyl group. Hairy root culture, obtained by transformation with Agrobacterium rhizogenes strain 15834, exhibit a potent ability of synthesis of oleanolic acid glycosides. The HPLC profile of saponin fraction obtained from C. officinalis hairy roots treated with plant stress hormone, jasmonic acid, showed the 10-times increase of the content of one particular compound, determined by NMR and MALDI TOF as a new bisdesmoside saponin, 3-O-β-d-glucuronopyranosyl-28-O-β-d-galactopyranosyl-oleanolic acid...
April 18, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29664490/multiple-carrier-transfer-pathways-in-a-flower-like-in-2-s-3-cdin-2-s-4-in-2-o-3-ternary-heterostructure-for-enhanced-photocatalytic-hydrogen-production
#7
Dandan Ma, Jian-Wen Shi, Yajun Zou, Zhaoyang Fan, Jinwen Shi, Linhao Cheng, Diankun Sun, Zeyan Wang, Chunming Niu
A novel flower-like In2S3/CdIn2S4/In2O3 (ICS) ternary heterostructure (HS) is rationally constructed for the first time by a series of carefully designed procedures. In2O3 nanoflakes are the main constituent units which assemble into a flower-like skeleton structure, and CdIn2S4 nanoparticles are in situ generated on the surface of In2O3 nanoflakes through the transformation of CdS quantum dots (QDs) while In2S3 nanoparticles are in situ produced at the region between CdIn2S4 nanoparticles and In2O3 nanoflakes resulting from a synchronous sulfuration procedure...
April 17, 2018: Nanoscale
https://www.readbyqxmd.com/read/29663605/effects-of-non-protein-amino-acids-on-survival-and-locomotion-of-osmia-bicornis
#8
Antonio Felicioli, Simona Sagona, Marta Galloni, Laura Bortolotti, Gherardo Bogo, Massimo Guarnieri, Massimo Nepi
To investigate the effects of two non-protein amino acids, β-alanine and γ-amino butyric acid (GABA), on Osmia bicornis survival and locomotion, two groups of caged bees were fed with sugar syrup enriched with β-alanine and GABA, respectively. A further control group was fed with sugar syrup. Five behavioural categories were chosen according to the principle of parsimony and intrinsic unitary consistency from start to end, and recorded by scan sampling: two states (remaining under paper or in tubes) and three events (walking on net, feeding from flower and flying)...
April 17, 2018: Insect Molecular Biology
https://www.readbyqxmd.com/read/29663552/sex-differences-in-the-drivers-of-reproductive-skew-in-a-cooperative-breeder
#9
Martha J Nelson-Flower, Tom P Flower, Amanda R Ridley
Many cooperatively breeding societies are characterized by high reproductive skew, such that some socially dominant individuals breed, while socially subordinate individuals provide help. Inbreeding avoidance serves as a source of reproductive skew in many high-skew societies, but few empirical studies have examined sources of skew operating alongside inbreeding avoidance, or compared individual attempts to reproduce (reproductive competition) with individual reproductive success. Here we use long-term genetic and observational data to examine factors affecting reproductive skew in the high-skew cooperatively breeding southern pied babbler (Turdoides bicolor)...
April 16, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29662498/small-rna-and-degradome-deep-sequencing-reveals-the-roles-of-micrornas-in-seed-expansion-in-peanut-arachis-hypogaea-l
#10
Xingli Ma, Xingguo Zhang, Kunkun Zhao, Fapeng Li, Ke Li, Longlong Ning, Jialin He, Zeyu Xin, Dongmei Yin
Seed expansion in peanut is a complex biological process involving many gene regulatory pathways. MicroRNAs (miRNAs) play important regulatory roles in plant growth and development, but little is known about their functions during seed expansion, or how they contribute to seed expansion in different peanut lines. We examined seed miRNA expression patterns at 15 and 35 days after flowering (DAF) in two peanut eighth-generation recombinant inbred lines (RIL8); 8106, a medium-pod variety, and 8107, a super-pod variety...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29660753/crataegus-special-extract-ws-1442-effects-on-enos-and-microrna-155
#11
Xinwen Wang, Yan Liang, Jian Shi, Hao-Jie Zhu, Barry E Bleske
Increased expression of microRNA 155 (miR-155) results in a decrease in endothelial nitric oxide synthase (eNOS) expression and impaired endothelial function. Factors that have been shown to increase expression of miR-155 may be mitigated by WS 1442, an extract of hawthorn leaves and flowers ( Crataegus special extract) that contains a range of pharmacologically active substances including oligomeric proanthocyanidins and flavonoids. The purpose of this study is to determine the effect of WS 1442 on the expression of miR-155 and eNOS in the presence of tumor necrosis factor (TNF- α )...
April 16, 2018: Planta Medica
https://www.readbyqxmd.com/read/29660623/hydrothermal-preparation-of-3d-flower-like-bipo-4-bi-2-wo-6-microsphere-with-enhanced-visible-light-photocatalytic-activity
#12
Ruiyang Wu, Hongbo Song, Nan Luo, Guijuan Ji
A novel 3D flower-like BiPO4 /Bi2 WO6 photocatalyst was prepared using hydrothermal method. The crystal structure, surface morphologies and optical properties of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and Ultraviolet-visible diffuse reflectance spectrum (UV-vis DRS). The photocatalytic activity of the BiPO4 /Bi2 WO6 composites was evaluated by using rhodamine B (RhB) as a target organic pollutant under visible light irradiation...
March 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29660560/phloem-physics-mechanisms-constraints-and-perspectives
#13
REVIEW
Kaare H Jensen
Plants have evolved specialized vascular tissues for the distribution of energy, water, nutrients, and for communication. The phloem transports sugars from photosynthetic source regions (e.g. mature leaves) to sugar sinks (e.g. developing tissues such as buds, flowers, roots). Moreover, chemical signals such as hormones, RNAs and proteins also move in the phloem. Basic physical processes strongly limit phloem anatomy and function. This paper provides an overview of recent research and perspectives on phloem biomechanics and the physical constraints relevant to sugar transport in plants...
April 13, 2018: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/29660180/a-chromatin-loop-represses-wuschel-expression-in-arabidopsis
#14
Lin Guo, Xiuwei Cao, Yuhao Liu, Jun Li, Yongpeng Li, Dongming Li, Ke Zhang, Caixia Gao, Aiwu Dong, Xigang Liu
WUSCHEL (WUS) is critical for plant meristem maintenance and determinacy in Arabidopsis, and the regulation of its spatiotemporal expression patterns is complex. We previously found that AGAMOUS (AG), a key MADS-domain transcription factor in floral organ identity and floral meristem determinacy, can directly suppress WUS expression through the recruitment of the Polycomb group (PcG) protein TERMINAL FLOWER2 (TFL2, also known as LIKE HETEROCHROMATIN PROTEIN1, LHP1) at the WUS locus. However, the mechanism by which WUS is repressed remains unclear...
April 16, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29660015/structural-basis-of-dna-target-recognition-by-the-b3-domain-of-arabidopsis-epigenome-reader-val1
#15
Giedrius Sasnauskas, Kotryna Kauneckaite, Virginijus Siksnys
Arabidopsis thaliana requires a prolonged period of cold exposure during winter to initiate flowering in a process termed vernalization. Exposure to cold induces epigenetic silencing of the FLOWERING LOCUS C (FLC) gene by Polycomb group (PcG) proteins. A key role in this epigenetic switch is played by transcriptional repressors VAL1 and VAL2, which specifically recognize Sph/RY DNA sequences within FLC via B3 DNA binding domains, and mediate recruitment of PcG silencing machinery. To understand the structural mechanism of site-specific DNA recognition by VAL1, we have solved the crystal structure of VAL1 B3 domain (VAL1-B3) bound to a 12 bp oligoduplex containing the canonical Sph/RY DNA sequence 5'-CATGCA-3'/5'-TGCATG-3'...
April 6, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29659996/my-favourite-flowering-image-an-arabidopsis-inflorescence-expressing-fluorescent-reporters-for-the-apetala3-and-superman-genes
#16
Nathanaël Prunet
No abstract text is available yet for this article.
April 6, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29659946/ethylene-responsive-factor-erf110-mediates-ethylene-regulated-transcription-of-a-sex-determination-related-orthologous-gene-in-two-cucumis-species
#17
Qianyi Tao, Huanhuan Niu, Zhongyuan Wang, Wenhui Zhang, Hu Wang, Shenhao Wang, Xian Zhang, Zheng Li
In plants, unisexual flowers derived from developmental sex determination form separate stamens and pistils that facilitate cross pollination. In cucumber and melon, ethylene plays a key role in sex determination. Six sex determination-related genes have been identified involving in ethylene biosynthesis in these Cucumis species. The interactions among these genes are thought to involve ethylene signaling; however, the detailed regulatory mechanism remains unknown. In this study, hormone treatment and qPCR assays were used to confirm expression of these sex determination-related genes in cucumber and melon is ethylene sensitive...
April 5, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29659890/postharvest-irradiation-treatment-for-quarantine-control-of-western-flower-thrips-thysanoptera-thripidae
#18
Adrian H Nicholas, Peter A Follett
The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an important pest of fresh horticultural produce and as such is considered a biosecurity risk in many countries from which it is absent. Information is needed on the radiation tolerance of important surface pests of quarantine importance such as F. occidentalis so that phytosanitary irradiation treatments for exported fresh commodities can be lowered to below the 400 Gy generic treatment currently approved for most insects in the United States and Australia...
April 5, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29659815/plant-lineage-specific-amplification-of-transcription-factor-binding-motifs-by-miniature-inverted-repeat-transposable-elements-mites
#19
Jordi Morata, Fatima Marín, Jordi Payet, Josep M Casacuberta
Transposable elements are one of the main drivers of plant genome evolution. Transposon insertions can modify the gene coding capacity or the regulation of their expression, the latter being a more subtle effect, and therefore particularly useful for evolution. Transposons have been show to contain transcription factor binding sites that can be mobilized upon transposition with the potential to integrate new genes into transcriptional networks. MITEs are a type of non-coding DNA transposons that could be particularly suited as a vector to mobilize transcription factor binding sites and modify transcriptional networks during evolution...
April 5, 2018: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29659812/the-genome-sequence-and-transcriptome-of-potentilla-micrantha-and-their-comparison-to-fragaria-vesca-the-woodland-strawberry
#20
Matteo Buti, Marco Moretto, Elena Barghini, Flavia Mascagni, Lucia Natali, Matteo Brilli, Alexandre Lomsadze, Paolo Sonego, Lara Giongo, Michael Alonge, Riccardo Velasco, Claudio Varotto, Nada Šurbanovski, Mark Borodovsky, Judson A Ward, Kristof Engelen, Andrea Cavallini, Alessandro Cestaro, Daniel James Sargent
Background: The genus Potentilla is closely related to that of Fragaria, the economically important strawberry genus. Potentilla micrantha is a species that does not develop berries but shares numerous morphological and ecological characteristics with Fragaria vesca. These similarities make P. micrantha an attractive choice for comparative genomics studies with F. vesca. Findings: In this study, the P. micrantha genome was sequenced and annotated, and RNA-Seq data from the different developmental stages of flowering and fruiting were used to develop a set of gene predictions...
April 1, 2018: GigaScience
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