92 Works

Data from: A superlinear iteration method for calculation of finite length journal bearing's static equilibrium position

Wenjie Zhou, Xuesong Wei, Guangkuan Wu & Leqin Wang
Solving the static equilibrium position is one of the most important parts of dynamic coefficients calculation and further coupled calculation of rotor system. The main contribution of this study is testing the superlinear iteration convergence method - twofold secant method, for determination of the static equilibrium position of journal bearing with finite length. Essentially, the Reynolds equation for stable motion is solved by finite difference method and the inner pressure is obtained by successive over-relaxation...

Data from: Myelin basic protein induces neuron-specific toxicity by directly damaging the neuronal plasma membrane

Jie Zhang, Xin Sun, Sixin Zheng, Xiao Liu, Jinghua Jin, Yi Ren & Jianhong Luo
The central nervous system (CNS) insults may cause massive demyelination and lead to the release of myelin-associated proteins including its major component myelin basic protein (MBP). MBP is reported to induce glial activation but its effect on neurons is still little known. Here we found that MBP specifically bound to the extracellular surface of the neuronal plasma membrane and induced neurotoxicity in vitro. This effect of MBP on neurons was basicity-dependent because the binding was...

Data from: Brassinosteroids act as a positive regulator of NBR1-dependent selective autophagy in response to chilling stress in tomato

Jie Zhou, Cheng Chi, Xiaomeng Li, Pingping Fang, Xiaojian Xia, Kai Shi, Yanhong Zhou & Jing-Quan Yu
Autophagy is a highly conserved and regulated catabolic process involved in the degradation of protein aggregates, and it plays critical roles in eukaryotes. In plants, autophagy has been well studied in stress responses. Although multiple molecular processes can induce or suppress autophagy, the mechanism of its regulation by phytohormones is poorly understood. Brassinosteroids (BRs) are steroid phytohormones that play crucial roles in plant response to stresses. In present study, we investigate the role of BRs...

Biocontrol potential of a novel endophytic bacterium from Mulberry (Morus) tree

Marine Vallet & Yongqi Shao
Mulberry (Morus) is an economically important woody tree that is suitable for use in sericulture as forage and in medicine. However, this broad-leaved tree is facing multiple threats ranging from phytopathogens to insect pests. Here, a Gram-positive, endospore-forming bacterium (ZJU1) was frequently isolated from healthy mulberry plants by screening for foliar endophytes showing antagonism against pathogens and pests. Whole-genome sequencing and annotation resulted in a genome size of 4.06 Mb and classified the bacterium as...

Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth

Lingfei Hu, Zhenwei Wu, Christelle A.M. Robert, Matthias Erb, Jianming Xu, Xiao Ouyang, Tobias Züst & Adrien Mestrot
Plant secondary (or specialized) metabolites mediate important interactions in both the rhizosphere and the phyllosphere. If and how such compartmentalized functions interact to determine plant-environment interactions is not well understood. Here, we investigated how the dual role of maize benzoxazinoids as leaf defenses and root siderophores shapes the interaction between maize and a major global insect pest, the fall armyworm. We find that benzoxazinoids suppress fall armyworm growth when plants are grown in soils with...

Horizontally acquired cysteine synthase genes undergo functional divergence in lepidopteran herbivores

Yinghui Li & Huabing Wang
Horizontal gene transfer (HGT) plays an important role in evolutionary processes as organisms adapt to their environments, and now cases of gene duplication after HGT in eukaryotes are emerging at an increasing rate. However, the fate and roles of the duplicated genes over time in eukaryotes remain unclear. Here we conducted a comprehensive analysis of the evolution of cysteine synthase (CYS) in lepidopteran insects. Our results indicate that HGT-derived CYS genes are widespread and have...

Vachellia drepanolobium nutrient translocation in response to smoke

Katherine Angier, Richard Rabideau-Childers, Brendan Dean, Meghan Blumstein, Walker Darling, Annina Kennedy-Yoon, Clayton Ziemke, Christian Perez-Martinez, Donghao Wu, Wenqing Ye, Inam Yekwayo, Duncan Kimuyu, Dino Martins & Naomi Pierce
1. Fire is a major selective force on arid grassland communities, favoring traits such as the smoke-induced seed germination response seen in a wide variety of plant species. However, little is known about the relevance of smoke as a cue for plants beyond the seedling stage. 2. We exposed a fire-adapted savanna tree, Vachellia (=Acacia) drepanolobium, to smoke and compared nutrient concentrations in leaf and root tissues to unexposed controls. Experiments were performed on three...

Data from: The distribution of plants and seed dispersers in response to habitat fragmentation in an artificial island archipelago

Jiajia Liu, Ferry Slik, David Coomes, Richard T. Corlett, Yanping Wang, Maxwell Wilson, Guang Hu, Ping Ding & Mingjian Yu
Aim: Small, old-growth forest fragments generally have more small-seeded plants than large patches, due to the disappearance of large seed dispersing vertebrates. This pattern may differ for secondary forest fragments where differential migration ability rather than persistence of seed dispersers may be driving plant community assembly. In this paper, we investigated the effect of habitat fragmentation on seed dispersers and plant community structure in regenerating forests. Location: The Thousand Island Lake, China. Taxon: Plants, birds...

Data from: Natural selection and repeated patterns of molecular evolution following allopatric divergence

Yibo Dong, Shichao Chen, Shifeng Cheng, Wenbin Zhou, Qing Ma, Zhiduan Chen, Cheng-Xin Fu, Xin Liu, Yun-Peng Zhao, Pamela S. Soltis, Gane Ka-Shu Wong, Douglas E. Soltis & Jenny Xiang
Background: Geographic speciation is a major force in generating biodiversity. However, how genomes diverge over time after geographic isolation has halted gene flow has remained unclear. We examine genome-wide divergence of putatively single-copy orthologous genes (POGs) from transcriptomes in 20 allopatric species/variety pairs from diverse angiosperm clades. Sixteen of these pairs reflect the well-known eastern Asia – eastern North America floristic disjunction; these species have been isolated for different lengths of time, from the Miocene...

Data from: Active information maintenance in working memory by a sensory cortex

Xiaoxing Zhang, Wenjun Yan, Wenliang Wang, Hongmei Fan, Ruiqing Hou, Yulei Chen, Zhaoqin Chen, Chaofan Ge, Shumin Duan, Albert Compte & Chengyucheng T. Li
Working memory is a critical brain function for maintaining and manipulating information over delay periods of seconds. It is debated whether delay-period neural activity in sensory regions is important for the active maintenance of information during the delay period. Here, we tackle this question by examining the anterior piriform cortex (APC), an olfactory sensory cortex, in head-fixed mice performing several olfactory working memory tasks. Active information maintenance is necessary in these tasks, especially in a...

Data from: Taxonomic resolution is a determinant of biodiversity effects in arbuscular mycorrhizal fungal communities

Haishui Yang, Qian Zhang, Roger T. Koide, Jason D. Hoeksema, Jianjun Tang, Xinmin Bian, Shuijin Hu & Xin Chen
Arbuscular mycorrhizal fungi (AMF) are key regulators of ecosystem processes, yet how their biodiversity works in ecosystems remains poorly understood. We documented the extent to which taxonomic resolution influenced the effect of biodiversity of AMF taxa on plant performance (growth, nutrient uptake and stress tolerance) in a meta-analysis of 902 articles. We found that the effect of biodiversity of AMF taxa depended on taxonomic resolution. Plant performance was positively promoted by AMF family richness, while...

Data from: Potential role of Cyr61 induced degeneration of human Müller cells in diabetic retinopathy

Fen Zhou, Yikui Zhang, Ding Chen, Zhitao Su, Ling Jin, Lei Wang, Zhixiang Hu, Zhisheng Ke & Zongming Song
The degeneration of Müller cells has been recognized to involve in the pathogenesis of diabetic retinopathy. However, the mechanism is not yet clear. This study is to explore the potential role of Cyr61, a secreted signaling protein in extracellular matrix, in inducing human Müller cell degeneration in diabetic retinopathy (DR). Twenty patients with proliferative diabetic retinopathy (PDR) and twelve non-diabetic patients were recruited for this study. Vitreous fluid was collected during vitrectomy surgery for Cyr61...

Data from: Effects of light and topography on regeneration and coexistence of evergreen and deciduous tree species in a Chinese subtropical forest

Yi Jin, Sabrina E. Russo & Mingjian Yu
1. Evergreen broad-leaved forests are widely distributed in eastern Asia with evergreen (EBL) and deciduous (DBL) broad-leaved tree species coexisting under the same climatic regime, raising questions as to the underlying mechanisms. Since EBL and DBL species differ in leaf lifespan, a key component of resource economic strategies, their coexistence might be attributed to regeneration niche partitioning across habitats varying in resource supply. 2. We investigated the effects of variation in insolation and topography on...

Data from: Patterns of genetic differentiation at MHC class I genes and microsatellites identify conservation units in the giant panda

Ying Zhu, Qiu-Hong Wan, Bin Yu, Yun-Fa Ge & Shengguo Fang
Background: Evaluating patterns of genetic variation is important to identify conservation units (i.e., evolutionarily significant units [ESUs], management units [MUs], and adaptive units [AUs]) in endangered species. While neutral markers could be used to infer population history, their application in the estimation of adaptive variation is limited. The capacity to adapt to various environments is vital for the long-term survival of endangered species. Hence, analysis of adaptive loci, such as the major histocompatibility complex (MHC)...

Data from: Dissecting the phenotypic components of crop plant growth and drought responses based on high-throughput image analysis

Dijun Chen, Kerstin Neumann, Swetlana Friedel, Benjamin Kilian, Ming Chen, Thomas Altmann & Christian Klukas
Significantly improved crop varieties are urgently needed to feed the rapidly growing human population under changing climates. While genome sequence information and excellent genomic tools are in place for major crop species, the systematic quantification of phenotypic traits or components thereof in a high-throughput fashion remains an enormous challenge. In order to help bridge the genotype to phenotype gap, we developed a comprehensive framework for high-throughput phenotype data analysis in plants, which enables the extraction...

Data from: Comprehensive diagnosis of PCDD/F emission from three hazardous waste incinerators

Xuan Cao, Longjie Ji, Xiaoqing Lin, William R. Stevens, Minghui Tang, Fanjie Shang, Shaofu Tang & Shengyong Lu
Comprehensive diagnosis of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) emissions was systematically conducted on three hazardous waste incinerators (HWIs.) Results indicated that PCDD/F mainly existed in the solid phase before the bag filter. This was especially true for higher chlorinated dioxin and furan congeners (hexa-, hepta- and octa-.) The aged bag filters tended to increase the gas-phase PCDD/F. Emissions also increased due to PCDD/F desorption from circulated scrubbing solution and plastic packing media used in the...

Data from: A comparative study on genetic effects of artificial and natural habitat fragmentation on Loropetalum chinense (Hamamelidaceae) in Southeast China

Na Yuan, Hans-Peter Comes, Ya-Nan Cao, Rui Guo, Yong-Hua Zhang & Ying-Xiong Qiu
Elucidating the demographic and landscape features that determine the genetic effects of habitat fragmentation has become fundamental to research in conservation and evolutionary biology. Land-bridge islands provide ideal study areas for investigating the genetic effects of habitat fragmentation at different temporal and spatial scales. In this context, we compared patterns of nuclear microsatellite variation between insular populations of a shrub of evergreen broad-leaved forest, Loropetalum chinense, from the artificially created Thousand-Island Lake (TIL) and the...

Data from: MHC class I diversity predicts non-random mating in Chinese alligators (Alligator sinensis)

Qun-Hua Han, Ru-Na Sun, Hai-Qiong Yang, Zhen-Wei Wang, Qiu-Hong Wan & Sheng-Guo Fang
The major histocompatibility complex (MHC) plays numerous important roles in kin recognition, pathogen resistance, and mate selection. Research in fish, birds, and mammals have suggested that individuals optimize MHC diversity, and therefore offspring fitness, when choosing mates. In reptiles, however, it is unclear whether female mate choice is based on genome-wide genetic characteristics such as microsatellites DNA loci, on particular functional trait loci (e.g., MHC) or on both, and MHC effects on mate choice remain...

Data from: Expression plasticity and evolutionary changes extensively shape the sugar-mimic alkaloid adaptation of non-digestive glucosidase in lepidopteran mulberry-specialist insects

Xiaotong Li, Liangen Shi, Xiangping Dai, Yajie Chen, Hongqing Xie, Min Feng, Yuyin Chen & Huabing Wang
During the co-evolutionary arms race between plants and herbivores, insects evolved systematic adaptive plasticity to minimise the chemical defence effects of their host plants. Previous studies mainly focused on the expressional plasticity of enzymes in detoxification and digestion. However, the expressional response and adaptive evolution of other fundamental regulators against host phytochemicals are largely unknown. Glucosidase II (GII), which is composed of a catalytic GIIα subunit and a regulatory GIIβ subunit, is an evolutionarily conserved...

Data from: Facilitation among plants can accelerate density-dependent mortality and steepen self-thinning lines in stressful environments

Wei-Ping Zhang, Xin Jia & Gen-Xuan Wang
The speed and slope of plant self-thinning are all affected by plant-plant interactions across environmental gradients. Possible mechanisms driving the self-thinning dynamics include the relative strength of root vs. shoot competition, and the interplay between competition and facilitation. Although these mechanisms often act in concert, their relative importance has not yet been fully explored. We used both a one-layer and a two-layer zone-of-influence (ZOI) model to examine how competition and facilitation drive self-thinning across stress...

Data from: Phylogeny of Morella rubra and its relatives (Myricaceae) and genetic resources of Chinese bayberry using RAD sequencing

Luxian Liu, Xinjie Jin, Nan Chen, Xian Li, Pan Li & Chengxin Fu
Phylogenetic relationships among Chinese species of Morella (Myricaceae) are unresolved. Here, we use restriction site-associated DNA sequencing (RAD-seq) to identify candidate loci that will help in determining phylogenetic relationships among Morella rubra, M. adenophora, M. nana and M. esculenta. Three methods for inferring phylogeny, maximum parsimony (MP), maximum likelihood (ML) and Bayesian concordance, were applied to data sets including as many as 4253 RAD loci with 8360 parsimony informative variable sites. All three methods significantly...

Data from: Impacts of species richness on productivity in a large-scale subtropical forest experiment

Yuanyuan Huang, Yuxin Chen, Nadia Castro-Izaguirre, Martin Baruffol, Matteo Brezzi, Anne Lang, Ying Li, Werner Härdtle, Werner Von Oheimb, Xuefeu Yang, Xiaojuan Liu, Kequan Pei, Sabine Both, Bo Yang, David Eichenberg, Thorsten Assmann, Jürgen Bauhus, Thorsten Behrens, François Buscot, Xiao-Yong Chen, Douglas Chester, Bing-Yang Ding, Walter Durka, Alexandra Erfmeier, Jingyun Fang … & Bernhard Schmid
Biodiversity experiments have shown that species loss reduces ecosystem functioning in grassland. To test whether this result can be extrapolated to forests, the main contributors to terrestrial primary productivity, requires large-scale experiments. We manipulated tree species richness by planting more than 150,000 trees in plots with 1 to 16 species. Simulating multiple extinction scenarios, we found that richness strongly increased stand-level productivity. After 8 years, 16-species mixtures had accumulated over twice the amount of carbon...

Data from: Stress induced gene expression drives transient DNA methylation changes at adjacent repetitive elements

David Secco, Chuang Wang, Huixia Shou, Matthew D. Schultz, Serge Chiarenza, Laurent Nussaume, Joseph R. Ecker, James Whelan & Ryan Lister
Cytosine DNA methylation (mC) is a genome modification that can regulate the expression of coding and non-coding genetic elements. However, little is known about the involvement of mC in response to environmental cues. Using whole genome bisulfite sequencing to assess the spatio-temporal dynamics of mC in rice grown under phosphate starvation and recovery conditions, we identified widespread phosphate starvation-induced changes in mC, preferentially localized in transposable elements (TEs) close to highly induced genes. These changes...

Data from: Spatial phylogenetics reveals evolutionary constraints on the assembly of a large regional flora

Daniel Spalink, Ricardo Kriebel, Pan Li, Matthew C. Pace, Bryan T. Drew, John G. Zaborsky, Jeffrey R. Rose, Chloe P. Drummond, Mary Ann Feist, William S. Alverson, Donald M. Waller, Kenneth M. Cameron, Thomas J. Givnish & Kenneth J. Sytsma
Premise of the study: We use spatial phylogenetics to analyze the assembly of the Wisconsin flora, linking processes of dispersal and niche evolution to spatial patterns in floristic and phylogenetic diversity, and testing whether phylogenetic niche conservatism can account for these patterns. Methods: We use digitized records and a new molecular phylogeny for all vascular plants in Wisconsin to estimate spatial variation in species richness and phylogenetic  and  diversity in a native flora...

Degradation of aniline in water with gaseous streamer corona plasma

Yang Li, Zhanguo Li, Zhen Liu, Shitong Han, Sanping Zhao, Keping Yan & Anna Zhu
This paper demonstrated the effects and influencing factors in degrading aniline by gaseous streamer corona plasma along water surface under different discharging gas atmospheres. For aniline with an initial concentration of 100 mg/L, the degradation was fastest when the reactor was not ventilated, and degradation rate is 98.5% under 7.5 min treatment. While the degradation was slowest when Ar was ventilated, the degradation rate is 98.6% after treated for 60 min. Some active particles were...

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