20 Works

β-Elemene derivatives produced from SeO2-mediated oxidation reaction

Xingrui He, Xiao-Tao Zhuo, Yuan Gao, Renren Bai, Xiang-Yang Ye & Tian Xie
We report herein the first access of ß-elemene derivatives through the SeO2-mediated oxidation reaction. Several new compounds were isolated through such one-step reaction, and their structures were elucidated using various 2D-NMR techniques. This method provides easy access to multiple oxidative ß-elemene derivatives in one single step, and represents the first cyclohexyl ring modifications of ß-elemene. It’s expected to open up the opportunity for future derivatization on cyclohexyl ring of ß-elemene. The new compounds obtained above...

Data from: Low-frequency fluctuations of the resting brain: high magnitude does not equal high reliability

Dewang Mao, Zhongxiang Ding, Wenbin Jia, Wei Liao, Xun Li, Huiyuan Huang, Jianhua Yuan, Yu-Feng Zang & Han Zhang
The amplitude of low-frequency fluctuation (ALFF) measures low-frequency oscillations of the blood-oxygen-level-dependent signal, characterizing local spontaneous activity during the resting state. ALFF is a commonly used measure for resting-state functional magnetic resonance imaging (rs-fMRI) in numerous basic and clinical neuroscience studies. Using a test-retest rs-fMRI dataset consisting of 21 healthy subjects and three repetitive scans, we found that several key brain regions with high ALFF intensities (or magnitude) had poor reliability. Such regions included the...

Considering inner and outer bark as distinctive tissues helps to disentangle the effects of bark traits on decomposition

Li Lin, Li Lin, Yao-Bin Song, Yikang Li, Leo Goudzwaard, Richard S.P. Van Logtestijn, Chenhui Chang, Rob Broekman, Jurgen Van Hal, Juan Zuo, Frank J. Sterck, Lourens Poorter, Ute Sass-Klaassen, Mariet M. Hefting & J. Hans C. Cornelissen
Revealing the ecological consequences of bark multifunctionality and its underlying traits has become a relatively new but essential focus in plant ecology. Although the enormous differences between the most crucial bark layers, i.e., inner and outer bark, in structure and functions have been widely recognized, the overall bark has been regarded as a homogenous tissue in most bark-related studies. This has led to poor knowledge on the functional independence, specialized contributions and possible linkages of...

Sex-specific strategies of nutrient resorption associated with leaf economics in Populus euphratica

Lei Yu
There are differences between sexes in physiological and functional traits and possibly in nutrient resorption, particularly in nutrient-poor environments. However, little is known about the extent of nutrient resorption from fine stems and fine roots, and how nutrient resorption is related to leaf economics in the males and females of dioecious trees. We investigated nutrient resorption of different organs and explored whether nutrient resorption is associated with nutrient conservation traits of leaves (e.g. leaf thickness,...

Data and supporting information from: Higher metabolic plasticity in temperate compared to tropical lizards suggests increased resilience to climate change

Baojun Sun, Caroline Williams, Teng Li, John Speakman, Zengguang Jin, Hongliang Lu, Laigao Luo & Weiguo Du
We investigate thermal acclimation of three species of Takydromus lizards distributed along a broad latitudinal gradient in China. The dataset are including metabolic rates, organ size, mitochondrial respiration, Cox activities, proteomic and metabolomic regulations of three Takydromus lizards after warm and cold acclimation in the laboratory. See details in related paper.

Data from: Maternal density stress and coccidian parasitism: synergistic effects on overwinter survival in root voles

Yan-Bin Yang, Guo-Zhen Shang, Shou-Yang Du, Xin Zhang, Yan Wu & Jiang-Hui Bian
1. Individuals in poor physiological condition are known to be more susceptible to infection that, once it occurs, further deteriorates the individuals’ conditions, making them even more susceptible to infection and leading to death. This vicious synergy between the host condition and infection has recently been proposed to be among the key factors determining the oscillation characteristics in natural populations. Field studies that directly test such a hypothesis, however, are currently scarce, and the physiological...

Data from: Latitudinal embryonic thermal tolerance and plasticity shape the vulnerability of oviparous species to climate change

Bao-Jun Sun, Liang Ma, Yang Wang, Chun-Rong Mi, Lauren Buckley, Ofir Levy, Hong-Liang Lu & Wei-Guo Du
Heat tolerance at the immobile embryonic stage is expected to be critical in determining species vulnerability to climate change. However, how the mean and developmental plasticity of embryonic heat tolerance vary geographically, and how these geographic variations affect species’ vulnerability under climate change remain unknown. We experimentally determined the mean and developmental plasticity of embryonic acute heat tolerance (EAHT, i.e., heat shock temperature at which embryonic heartbeats ceased) for three latitudinally-distributed populations of an oviparous...

Data from: Turtle embryos move to optimal thermal environments within the egg

Bo Zhao, Teng Li, Richard Shine, Wei-Guo Du & W.-G. Du
A recent study demonstrated that the embryos of soft-shelled turtles can reposition themselves within their eggs to exploit locally warm conditions. In the current paper, we ask whether turtle embryos actively seek out optimal thermal environments for their development, as do post-hatching individuals. Specifically, (1) do reptile embryos move away from dangerously-high temperatures, as well as towards warm temperatures? and (2) is such embryonic movement due to active thermoregulation, or (more simply) to passive embryonic...

Data from: Heat shock protein expression enhances heat tolerance of reptile and bird embryos

Jing Gao, Wen Zhang, Wei Dang, Yi Mou, Yuan Gao, Bao-Jun Sun, Wei-Guo Du, W.-G. Du & B.-J. Sun
The role of heat shock proteins (HSPs) in heat tolerance has been demonstrated in cultured cells and animal tissues, but rarely in whole organisms because of methodological difficulties associated with gene manipulation. By comparing HSP70 expression patterns among representative species of reptiles and birds, and by determining the effect of HSP70 overexpression on embryonic development and hatchling traits, we have identified the role of HSP70 in the heat tolerance of amniote embryos. Consistent with their...

Data from: Maternal effects and population regulation: maternal density-induced reproduction suppression impairs offspring capacity in response to immediate environment in root voles Microtus oeconomus

Jiang-Hui Bian, Shou-Yang Du, Yan Wu, Yi-Fan Cao, Xu-Heng Nie, Hui He & Zhi-Bing You
1. The hypothesis that maternal effects act as an adaptive bridge in translating maternal environments into offspring phenotypes and thereby affecting population dynamics has not been studied in the well-controlled fields. 2. In this study, the effects of maternal population-density on offspring stress axis, reproduction and population dynamics were studied in root voles (Microtus oeconomus). Parental enclosures for breeding offspring were established by introducing 6 adults per sex into each of 4 (low density) and...

Facile preparation of high conductive silver electrodes by dip-coating followed by quick sintering

Xingzhong Guo, Tianrui Chen, Hui Yang, Shengchi Bai & Yan Zhang
With polyol-synthesized silver nanoparticles (AgNPs) as raw materials, the silver electrodes with high conductivity were fabricated via dip-coating method followed by sintering process, and the effects of dip-coating and sintering process on the conductivity and surface roughness of silver electrodes were investigated in detail. The silver film with a thickness of 1.97 μm and a roughness of about 2 nm can be prepared after dip-coated at a pulling rate of 500 μm·s-1 for 40 coating...

Data from: Contrasting nitrogen cycling between herbaceous wetland and terrestrial ecosystems inferred from plant and soil nitrogen isotopes across China

Yu-Kun Hu, Guo-Fang Liu, Xu Pan, Yao-Bin Song, Ming Dong & Johannes H. C. Cornelissen
Understanding nitrogen (N) cycling in different ecosystems is crucial to predicting and mitigating the global effects of altered N inputs. Although wetlands have always been assumed to differ largely from terrestrial ecosystems in N cycling, evidence from direct comparison from the field along wide environmental gradients is lacking. Here, we hypothesized strong coupling of plant and soil δ15N in terrestrial ecosystems due to lower N inputs and losses but weak coupling of plant and soil...

Association of leaf silicon content with chronic wind exposure across and within herbaceous plant species

Yao-Bin Song, Yu-Kun Hu, Xu Pan, Guo-Fang Liu, Ming Dong & Johannes H. C. Cornelissen
Aim: High foliar silicon (henceforth Si) concentration protects plant tissues against herbivory but protection against several abiotic stressors has been proposed too, though the adaptive significance of these functions is still being debated. We aimed to explore the potential relationships between foliar Si content and chronic wind exposure across a large scale and multiple species, and analyze an overlooked alternative or complementary function of silicon in leaves: mechanical protection against wind. Location: Mainland China. Time...

Data from: Comparing macroecological patterns across continents: evolution of climatic niche breadth in varanid lizards

Long-Hui Lin & John J. Wiens
Macroecological analyses often test hypotheses at the global scale, or among more closely related species in a single region (e.g. continent). Here, we test several hypotheses about climatic niche widths among relatively closely related species that occur across multiple continents, and compare patterns within and across continents to see if they differ. We focus on the lizard genus Varanus (monitor lizards), which occurs in diverse environments in Africa, Asia, and Australia. We address three main...

Island biogeography of soil bacteria and fungi: similar patterns, but different mechanisms

Shaopeng Li, Pandeng Wang, Yongjian Chen, Maxwell Wilson, Xian Yang, Chao Ma, Jianbo Lu, Xiao-Yong Chen, Jianguo Wu, Wen-Sheng Shu & Lin Jiang
Microbes, similar to plants and animals, exhibit biogeographic patterns. However, in contrast with the considerable knowledge on the island biogeography of higher organisms, we know little about the distribution of microorganisms within and among islands. Here, we explored insular soil bacterial and fungal biogeography and underlying mechanisms, using soil microbiota from a group of land-bridge islands as a model system. Similar to island species-area relationships observed for many macroorganisms, both island-scale bacterial and fungal diversity...

Revisiting the origin of octoploid strawberry

Aaron Liston, Na Wei, Jacob Tennessen, Jumin Li, Ming Dong & Ashman Tia-Lynn
The cultivated strawberry (Fragaria ×ananassa) is an octoploid, and the identity of its four subgenomes has long been a mystery. In their recent strawberry genome publication, Edger et al. present a novel hypothesis: each subgenome originated from a different extant diploid progenitor, and the hexaploid species Fragaria moschata was a direct ancestor. We reanalyzed the four octoploid subgenomes in a phylogenomic context and our results support only two extant diploids progenitors; we also found no...

Revisiting of Carex sect. Confertiflorae s.l. (Cyperaceae): new data from molecular and morphological evidence and first insights on Carex biogeography in East Asia.

Yi-Fei Lu, Xiao-Feng Jin, Hiroshi Ikeda, Okihito Yano, Carmen Benítez Benítez, Wei-Jie Chen, Yong-Di Liu, Pedro Jiménez-Mejías & Ming-Jian Yu
Carex sect. Confertiflorae s.l., contains ca. 40 species and diverse in E Asia. It has one of the most unstable delimitations in the literature, and the section was proposed to split into two sections up to five different ones. Recent phylogenetic reconstructions showed Confertiflorae s.l. not to be monophyletic. In this study we investigate the phylogenetic structure, morphological affinities, and biogeographic history of sect. Confertiflorae s.l. We performed a taxon-based approach to explore the morphological...

Data from: Empirical studies on the network of social groups: the case of Tencent QQ

Zhi-Qiang You, Xiao-Pu Han, Linyuan Lü & Chi Ho Yeung
Background: Participation in social groups are important but the collective behaviors of human as a group are difficult to analyze due to the difficulties to quantify ordinary social relation, group membership, and to collect a comprehensive dataset. Such difficulties can be circumvented by analyzing online social networks. Methodology/Principal Findings: In this paper, we analyze a comprehensive dataset released from Tencent QQ, an instant messenger with the highest market share in China. Specifically, we analyze three...

Data from: Specific leaf area predicts dryland litter decomposition via two mechanisms

Guofang Liu, Lei Wang, Li Jiang, Xu Pan, Zhenying Huang, Ming Dong & Johannes H. C. Cornelissen
1. Litter decomposition plays important roles in carbon and nutrient cycling. In dryland both microbial decomposition and abiotic degradation (by UV light or other forces) drive variation in decomposition rates, but whether and how litter traits and position determine the balance between these processes is poorly understood. 2. We investigated relationships between litter quality and their decomposition rates among diverse plant species in a desert ecosystem in vertically contrasting positions representing distinct decomposition environments driven...

Data from: Nutrient enhancement of allelopathic effects of exotic on native plant species

Tao Xiao, Hua Yu, Yao-Bin Song, Yue-Ping Jiang, Bo Zeng & Ming Dong
PONE-D-18-19091_dataNutrient enhancement of allelopathic effects of exotic on native plant species

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