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Identification and functional analysis of CG3526 in spermatogenesis of Drosophila melanogaster

Insect Science 2024年第1期31卷 79-90页

作者： Qihao Hu yanhong Xiao Runnan Wei Ting tang Liang Wen Yuzhen Lu Xiao-Qiang Yu Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Guangzhou Key Laboratory of Insect Development Regulation and Application ResearchInstitute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhou510631 China

Spermatogenesis is a critical part of reproduction in insects;however,its molecular mechanism is still largely unknown.In this study,we identified a testis-specific gene CG3526 in Drosophila melanogaster.Bioinformatics analysis showed that CG3526 contains a zinc binding domain and 2 C2H2 type zinc fingers,and it is clustered to the vertebrate really interesting new gene(RING)family E3 ubiquitin-protein ligases.When CG3526 was knocked down by RNA interference(RNAi),the testis became much smaller in size,and the apical tip exhibited a sharp and thin end instead of the blunt and round shape in the control testis.More importantly,compared to the control flies,only a few mature sperm were present in the seminal vesicle of C587-Gal4>CG3526 RNAi flies.Immunofluorescence staining of the testis from CG3526 RNAi flies showed that the homeostasis of testis stem cell niche was disrupted,cell distribution in the apical tip was scattered,and the process of spermatogenesis was not completed.Furthermore,we found that the phenotype of CG3526 RNAi flies’testis was similar to that of testis of Stat92E RNAi flies,the expression level of CG3526 was significantly downregulated in the Stat92EF06346 mutant flies,and the promoter activity of CG3526 was upregulated by STAT92E.Taken together,our results indicated that CG3526 is a downstream effector gene in the JAK-STAT signaling pathway that plays a key role in the spermatogenesis of Drosophila.

关键词： CG3526 JAK-STAT spermatogenesis STAT92E testis

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Progress of Proximity Sensors for Potential Applications in Electronic Skins

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Transactions of Tianjin University 2024年第1期30卷 40-62页

作者： Runnan Zou yanhong Tong Jiayi Liu Jing Sun Da Xian Qingxin tang Center for Advanced Optoelectronic Functional Materials Research Key Lab of UV-Emitting Materials and Technology of Ministry of EducationNortheast Normal UniversityChangchun 130024China

Recently,electronic skins and fl exible wearable devices have been developed for widespread applications in medical monitoring,artifi cial intelligence,human–machine interaction,and artifi cial prosthetics.Flexible proximity sensors can accurately perceive external objects without contact,introducing a new way to achieve an ultrasensitive perception of objects.This article reviews the progress of fl exible capacitive proximity sensors,fl exible triboelectric proximity sensors,and fl exible gate-enhanced proximity sensors,focusing on their applications in the electronic skin fi eld.Herein,their working mechanism,materials,preparation methods,and research progress are discussed in detail.Finally,we summarize the future challenges in developing fl exible proximity sensors.

关键词： Capacitive proximity sensors Triboelectric proximity sensors Gate-enhanced proximity sensors Flexible wearable devices Electronic skins

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Introducing cerium into TiO_(2)@MnO_(x) hollow-sphere structure for highly active photothermocatalysis degradation of ethyl acetate and NO under H_(2)O at low temperature

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Journal of Rare Earths 2024年第5期42卷 889-898,I0003页

作者： Yinming Fan yanhong Wang Morui Li Yinian Zhu Zongqiang Zhu Shengpeng Mo Lihao Zhang Shen tang Xiaobin Zhou Yanping Zhang Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of TechnologyGuilin541004China The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control.Guilin University of Technology.Guilin 541004China Technical Innovation Center of Mine Geological Environmental Restoration Engineering in Southern Karst Area Nanning530022China

The CeO_(2)-TiO_(2)@MnO_(x) catalyst was prepared by the co-precipitation method and applied to the photothermocatalysis system of ethyl acetate and NO simultaneous degradation under H_(2)O at low temperature,which introduced Ce into TiO_(2)@MnO_(x) hollow sptrera structure.The optimum TiO_(2)/MnO_(x) ratio and Ce introducing amount were obtained in the process.Among of them,the NO and ethyl acetate conversion percentage of TiO_(2)@MnO_(x)(n_(Mn):n_(Ti)=40:40)is 74%and 62%at 240℃,respectively.CeO_(2)-TiO_(2)@MnO_(x)(n_(Mn):n_(Ce)=1:1)exhibits the best catalytic performance,its efficiency for NO conversion is 83%and the conversion of ethyl acetate reaches 72%at 240℃.In addition,it is confirmed that the Cedoped nanocomposites have more uniform dispersion through various characterization and analysis methods.Meanwhile,these catalysts have a large specific surface area as well as a large number of surface-active oxygen and oxygen vacancies.It can further improve the catalytic performance based on the adjusted ratio of active components.Moreover,this work investigated the relationship between multi-metal interactions and catalytic performance in the presence of H_(2)O.Finally,the possible reaction pathways for the simultaneous removal of NO and ethyl acetate were explored in our system.

关键词： Photothermocatalysis Ethyl acetate NO Low temperature H_(2)O Rare earths

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Cholinergic α7 nAChR signaling suppresses SARS-CoV-2 infection and inflammation in lung epithelial cells

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Journal of Molecular Cell Biology 2023年第7期15卷 73-76页

作者： Jing Wen Jing Sun yanhong tang Jincun Zhao Xiao Su Unit of Respiratory Infection and Immunity Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China CAS Key Laboratory of Molecular Virology and Immunology Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beĳing 100049China State Key Laboratory of Respiratory Disease National Clinical Research Centre for Respiratory DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120China

DearEditor,Coronavirus disease 2019(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection,has led to>6 million deaths and posed a huge threat to the global economy and public health.SARS-CoV-2 enters lungepithelial cellsdependingon the binding between SARS-CoV-2 S protein and the host receptor angiotensinconverting enzyme 2(ACE2).

关键词： ACE2 lung infection

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高山植物花中央的温度比边缘高:来自青藏高原的证据

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Journal of Plant Ecology 2023年第6期16卷 108-121页

作者： Yan Zhang yanhong tang Department of Ecology College of Urban and Environmental SciencesPeking UniversityBeijing 100871China

花表面温度对植物繁殖有重要作用,但花表面温度的空间分布规律仍不清楚,尤其是在高山植物中。为探讨花表面温度空间分布,我们分析了青藏高原东北部冷龙岭海拔3200至4000 m的18种植物的热成像照片,发现在直射辐射环境下花或花序表面温度... 详细信息

花表面温度对植物繁殖有重要作用,但花表面温度的空间分布规律仍不清楚,尤其是在高山植物中。为探讨花表面温度空间分布,我们分析了青藏高原东北部冷龙岭海拔3200至4000 m的18种植物的热成像照片,发现在直射辐射环境下花或花序表面温度空间变化很大,大多数花或花序的中央温度比边缘高出约1℃,最大可达11℃。太阳辐射和花的形状显著影响花表面温度的空间分布,如温度的空间变化范围、空间变化的标准差以及花中心与边缘部分的温度比值。花冠越大,表面温度的空间变异性越高。菊科植物表面花温及其空间变异性都比较高,花中央温度比边缘温度也比其它观测的物种更高更稳定。大多数物种花中央与边缘部分温度的比值随海拔上升而增大。这些结果表明,在高山植物中花或花序中央区域的热积累可能很普遍,其生态和进化意义有待进一步探索。

关键词：花形状花性状青藏高原繁殖成功温度分布

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青藏高原东北部39种阔叶草本植物叶大小随海拔增加而减少

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Journal of Plant Ecology 2022年第6期15卷 1227-1240页

作者： Xinran Ke Huixing Kang yanhong tang Department of Ecology College of Urban and Environmental SciencesPeking UniversityBeijing 100871China

种间或种内的叶大小随环境变化存在很大的差异,但这些差异如何随海拔变化一直都在争论。我们在青藏高原东北缘的冷龙岭和达坂山,沿海拔3200–4400 m的山坡上选取生长在开阔环境下的39种阔叶草本植物,观测了叶大小、叶长、叶宽和比叶重... 详细信息

种间或种内的叶大小随环境变化存在很大的差异,但这些差异如何随海拔变化一直都在争论。我们在青藏高原东北缘的冷龙岭和达坂山,沿海拔3200–4400 m的山坡上选取生长在开阔环境下的39种阔叶草本植物,观测了叶大小、叶长、叶宽和比叶重。研究结果表明,随海拔增加叶片显著减小,而且叶片面积的减小主要受叶片长度的影响,即随海拔增加叶长度减小明显。此外,叶片面积与海拔之间的关系随物种、叶倾角和叶表面特征而不同。利用局地环境观测数据驱动的能量平衡模型分析发现:叶温能更密切地追随气温变化,叶大小变化对叶温的影响在高海拔更为强烈。同时,基于上述能量平衡的计算结果,我们认为青藏高原东北部阔叶草本植物的海拔分布上限大约为5400 m。

关键词：海拔叶面积叶能量平衡叶长比叶重

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6-Phosphogluconate dehydrogenase 2 bridges the OPP and shikimate pathways to enhance aromatic amino acid production in plants

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Science China Life Sciences 2024年

作者： Qian tang Yuxin Huang Zhuanglin Shen Linhui Sun Yang Gu Huiqing He yanhong Chen Jiahai Zhou Limin Zhang Cuihuan Zhao Shisong Ma Yunhai Li Jie Wu Qiao Zhao Shenzhen Key Laboratory of Synthetic Genomics Guangdong Provincial Key Laboratory of Synthetic Genomics Key Laboratory of Quantitative Synthetic Biology Shenzhen Institute of Synthetic BiologyShenzhen Institute of Advanced Technology Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Key Laboratory for Quantitative Engineering Biology Shenzhen Institute of Synthetic Biology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Key Laboratory of Quantitative Synthetic Biology Shenzhen Institute of Synthetic Biology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Key Laboratory of Agricultural Microbiology of Heilongjiang Province Northeast Agricultural University Center for Plant Biology School of Life Sciences Tsinghua University State Key Laboratory of Plant Cell and Chromosome Engineering CAS Centre for Excellence in Molecular Plant Biology Institute of Genetics and Developmental Biology The Innovative Academy of Seed Design Chinese Academy of Sciences MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics School of Life Sciences University of Science and Technology of China Innovation Academy for Seed Design Chinese Academy of Sciences

The oxidative pentose phosphate(OPP) pathway provides metabolic intermediates for the shikimate pathway and directs carbon flow to the biosynthesis of aromatic amino acids(AAAs), which serve as basic protein building blocks and precursors of numerous metabolites essential for plant growth. However, genetic evidence linking the two pathways is largely unclear. In this study, we identified 6-phosphogluconate dehydrogenase 2(PGD2), the rate-limiting enzyme of the cytosolic OPP pathway, through suppressor screening of arogenate dehydrogenase 2(adh2) in Arabidopsis. Our data indicated that a single amino acid substitution at position 63(glutamic acid to lysine) of PGD2 enhanced its enzyme activity by facilitating the dissociation of products from the active site of PGD2, thus increasing the accumulation of AAAs and partially restoring the defective phenotype of adh2. Phylogenetic analysis indicated that the point mutation occurred in a well-conserved amino acid residue. Plants with different amino acids at this conserved site of PGDs confer diverse catalytic activities, thus exhibiting distinct AAAs producing capability. These findings uncover the genetic link between the OPP pathway and AAAs biosynthesis through PGD2. The gain-of-function point mutation of PGD2 identified here could be considered as a potential engineering target to alter the metabolic flux for the production of AAAs and downstream compounds.

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Grazing alters warming effects on leaf photosynthesis and respiration in Gentiana straminea,an alpine forb species

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Journal of Plant Ecology 2013年第5期6卷 418-427页

作者： Haihua Shen Shiping Wang yanhong tang Center for Environmental Biology and Ecosystem Studies National Institute for Environmental StudiesOnogawa 16-2TsukubaIbaraki 305-8506Japan State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100085China

Aims Vast grasslands on the Tibetan Plateau are almost all under livestock grazing.It is unclear,however,what is the role that the grazing will play in carbon cycle of the grassland under future climate warming.We found in our previous study that experimental warming can shift the optimum temperature of saturated photosynthetic rate into higher temperature in alpine plants.In this study,we proposed and tested the hypothesis that livestock grazing would alter the warming effect on photosynthetic and respiration through changing physical environments of grassland plants.Methods Experimental warming was carried by using an infrared heating system to increase the air temperature by 1.2 and 1.7℃ during the day and night,respectively.The warming and ambient temperature treatments were crossed over to the two grazing treatments,grazing and un-grazed treatments,respectively.To assess the effects of grazing and warming,we examined photosynthesis,dark respiration,maximum rates of the photosynthetic electron transport(J_(max)),RuBP carboxylation(V_(cmax))and temperature sensitivity of respiration Q_(10) in Gentiana straminea,an alpine species widely distributed on the Tibetan grassland.Leaf morphological and chemical properties were also examined to understand the physiological responses.Important findings 1)Light-saturated photosynthetic rate(A_(max))of G.straminea showed similar temperature optimum at around 16℃ in plants from all experimental conditions.Experimental warming increased A_(max) at all measuring temperatures from 10 to 25℃,but the positive effect of the warming occurred only in plants grown under the un-grazed conditions.Under the same measuring temperature,A_(max) was significantly higher in plants from the grazed than the un-grazed condition.2)There was significant crossing effect of warming and grazing on the temperature sensitivity(Q_(10))of leaf dark respiration.Under the un-grazed condition,plants from the warming treatment showed lower respiration rate but similar Q_(10) in comparison with plants from

关键词： alpine plant grazing photosynthesis respiration temperature acclimation

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Phylogeography of Potentilla fruticosa,an alpine shrub on the Qinghai-Tibetan Plateau

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Journal of Plant Ecology 2010年第1期3卷 9-15页

作者： Cui Li Ayako Shimono Haihua Shen yanhong tang Environmental Biology Division National Institute for Environmental StudiesOnogawa 16-2Tsukuba 305-8506Japan Faculty of Environment and Economics Shanxi University of Finance and EconomicsTaiyuan 030006ShanxiChina

Aims Our objectives were(i)to elucidate the phylogeography of chloroplast DNA(cpDNA)in Potentilla fruticosa in relation to Quaternary climate change and postglacial colonization,(ii)to infer historical population range expansion using mismatch distribution analyses and(iii)to locate the refugia of this alpine species on the Qinghai-Tibetan plateau during glacial-interglacial periods.Methods Potentilla fruticosa is a widespread species distributed on the Qinghai-Tibetan Plateau.We sampled leaves of P.fruticosa from 10 locations along a route of;1300 km from the northeastern plateau(Haibei,Qinghai)to the southern plateau(Dangxiong,Tibet).We examined the cpDNA of 15 haplotypes for 87 individuals from the 10 populations based on the sequence data from;1000 base pairs of the trnS-trnG and rpl20-rps12.Phylogenetic relationship of haplotypes was analyzed using the Phylip software package and the program TCS.The diversity of populations indices was obtained using the program ARLEQUIN.Important Findings With the limited samples,we found that(i)higher nucleotide diversity often occurs in high-altitude populations,(ii)the ancestral haplotypes distribute in the populations with higher nucleotide diversity than recent haplotypes,(iii)the expansion time of population in the high altitudes was estimated to be approximately at 52-25 ka BP(1000 years Before Present,where"Present"is AD 1950)and that in the low altitudes to be;5.1-2.5 ka BPand(iv)the source location of P.fruticosa is at the high altitudes,which might provide refugia for the species during the interglacial warm periods.The species expanded from the high-elevated locations on the tanggula Mountains during the Holocene.

关键词： alpine plants climatic changes cpDNA Qinghai Tibet

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Contrasting altitudinal patterns of leaf UV reflectance and absorbance in four herbaceous species on the Qinghai-Tibetan Plateau

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Journal of Plant Ecology 2019年第2期12卷 245-254页

作者： Xin Li Xinran Ke Huakun Zhou yanhong tang Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityNo.5 Yiheyuan RoadHaidian DistrictBeijing 100871China Key Laboratory of Cold Regions Restoration Ecology Qinghai ProvinceNorthwest Plateau Institute of BiologyChinese Academy of SciencesNo.23 Xinning RoadXining 810008China

Aims Alpine plants have to cope with intense ultraviolet(UV)radiation and its altitudinal changes.It has been argued that leaf UV reflec-tance and absorbance should play a central role in acclimation and adaptation to changes in UV radiation,but evidence is lim-ited from high altitudinal ecosystems.In this study,we assessed whether leaf UV reflectance and leaf pigments jointly vary with altitude in alpine broadleaved herbaceous species.The primary hypothesis is that leaves with higher UV reflectance should have lower UV absorbance and/or lower contents of photosynthetic pigments.Methods Leaf UV reflectance,leaf UV absorbance and photosynthetic pig-ments(chlorophyll a and b,carotenoids)were examined in four broadleaved herbaceous species in relation to their habitat alti-tudes.The leaf surface reflectance and leaf extract absorbance at wavelengths of 305 and 360 nm were measured to examine the leaf optical and photochemical characteristics in the UV-B and UV-A bands,respectively.The species included Saussurea katochaete Maxim.,Saussurea pulchra Lipsch.,Anaphalis lactea Maxim.and Rheum pumilum Maxim.,which are distributed along the same slope from 3200 to 4200 m in the Qilian Mountains,Qinghai-Tibetan Plateau.Important Findings The leaf UV absorbance was approximately twice as high at 305 nm(UV-B)than at 360 nm(UV-A)for all species except R.pumilum.Among the four species,the leaf UV absorbance was the highest and almost all values were within 2-6 Abs cm^(−2)(absorbance cm^(−2))in S.pulchra,but the lowest(frequently<1 Abs cm^(−2))were observed in R.pumilum.Only R.pumilum showed significantly higher values at higher elevations.Leaf UV reflectance was generally higher at higher elevations for all species except for A.lactea,and exhibited much larger altitudinal variations compared to leaf UV absorbance.Anaphalis lactea showed a very high UV reflectance even at low altitudes.Among the four species,photosynthetic pigments tended to decrease with an increase in leaf UV reflectance but increased with leaf UV absorbance.Th

关键词： altitudinal pattern leaf UV reflectance UV absorbance photosynthetic pigment UV environment

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