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Species profile and reactivity of volatile organic compounds emission in solvent uses,industry activities and from vehicular tunnels

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Journal of Environmental Sciences 2024年第1期135卷 546-559页

作者： Haimei Huang Zhangwei Wang Chunhao Dai Hai Wu Jia Guo Chunjie Wang Xiaoshan Zhang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China hunan agricultural University Changsha 430106China National institute of Metrology Beijing 100029China

A survey was conducted of the volatile organic compounds(VOCs)released from sources of solvent use,industry activities and vehicle emissions in Guiyang,a capital city of China.Samples were collected by canisters and analyzed by GC-MS-FID.The species profiles of VOCs emitted from sources were obtained.Results showed that xylenes,ethylbenzene,acetone and dichloromethane were the characteristics species for painting,2-propanol and ethyl acetate for printing,α-pinene for solid wood furniture manufacturing,and 2-butanone for biscuit baking.These characteristics species could be as tracers for the sources respectively.In most of samples from the solvent use,the benzene/toluene(B/T)ratio was less than 0.3,indicating that the ratio could be as the indicator for tracing the solvent use related sources.The results also suggested that the toluene/xylene(T/X)ratio be as the indicator to distinguish the VOCs sources of painting(2).Aromatics contributed the most to ozone formation potential(OFP)of most painting and non-paper printing sources,and oxygen-containing VOCs(OVOCs)were major species contributing to OFP of the sources from food production and paper printing.The OFP of the VOCs emissions from vehicle in tunnels and from other manufactures were dominated by both aromatics and alkenes.Theα-pinene could explain 56.94%and 32.54%of total OFP of the VOCs sources from filing cabinet and solid wood furniture manufacturing,which was rarely been involved in previous studies of VOCs source profiles,indicating that the species of concern for VOCs sources are still insufficient at present.

关键词： Volatile organic compounds(VOCs) Species profile BTEX ratio Source reactivity

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Bioactive chemical constituents from the marine-derived fungus Cladosporium sp.DLT-5

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Journal of Oceanology and Limnology 2024年第3期42卷 905-914页

作者： Luting DAI Qingyi XIE Jiaocen GUO Qingyun MA Li YANG Jingzhe YUAN Haofu DAI Zhifang YU Youxing ZHAO College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of research and Development of Natural Product from Li Folk Medicine of Hainan Province Institute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural Sciences&Hainan Academy of Tropical Agricultural ResourceHaikou 571101China

A new isochromanone,cladosporinisochromanone(1),accompanied by 15 known compounds(2–16)were obtained from secondary metabolites produced by marine-derived fungus Cladosporium sp.DLT-5.NMR and HRESIMS spectra elucidation determined the planar structure of 1.Subsequent electronic circular dichroism(ECD)experiment assigned the absolute configuration of 1.Compounds 1,2,4–6,and 10 displayed different degrees of neuroprotective activities on human neuroblastoma cells SH-SY5Y.Five compounds(1,3–5,and 13)emerged resistance to protein tyrosine phosphatase 1B(PTP1B),further kinetic analysis and molecular docking study indicated that the most potent compound 13(IC50value of 10.74±0.61μmol/L)was found as a noncompetitive inhibitor for PTP1B.Surface plasmon resonance(SPR)and molecular docking studies also demonstrated the interaction between compound 12 and Niemann-Pick C1 Like 1(NPC1L1),which has been identified as significant therapeutic target for hypercholesteremia.In addition,compounds 3,6,and 14 showed attractive inhibitory activity against the phytopathogenic fungi:Colletotrichum capsici.Therefore,library of Cladosporium metabolites is enriched and new active uses of known compounds are explored.

关键词： Cladosporium sp. marine-derived fungus neuroprotective effects protein tyrosine phosphatase 1B(PTP1B) Niemann-Pick C1 Like 1(NPC1L1) antifungal activity

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Single-cell transcriptome sequencing reveals the mechanism regulating rice plumule development

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The Crop Journal 2024年第3期12卷 688-697页

作者： Mingdong Zhu Meng Zhang Kunyong Huang Feifei Lu Hong Wang Shaolu Zhao Yinghong Yu Shaoqing Tang Haining Wu Peisong Hu Xiangjin Wei State Key Laboratory of Rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006ZhejiangChina b State Key Laboratory of Hybrid Rice Hunan Rice Research InstituteHunan Academy of Agricultural SciencesChangsha 410125HunanChina hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation College of BiologyHunan UniversityChangsha 410082HunanChina Hubei University Wuhan 430062HubeiChina

Seed plumules comprise multiple developing tissues and are key sites for above-ground plant organ morphogenesis.Here,the spatial expression of genes in developing rice seed plumules was characterized by single-cell transcriptome sequencing in Zhongjiazao 17,a popular Chinese indica rice cultivar.Of 15 cell clusters,13 were assigned to cell types using marker genes and cluster-specific genes.Marker genes of multiple cell types were expressed in several clusters,suggesting a complex developmental system.Some genes for signaling by phytohormones such as abscisic acid were highly expressed in specific clusters.Various cis-elements in the promoters of genes specifically expressed in cell clusters were calculated,and some key hormone-related motifs were frequent in certain clusters.Spatial expression patterns of genes involved in rapid seed germination,seedling growth,and development were identified.These findings enhanced our understanding of cellular diversity and specialization within plumules of rice,a monocotyledonous model crop.

关键词： Rice Plumule Single-cell sequencing Regulatory network

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Simple method for transformation and gene editing in medicinal plants

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Journal of Integrative Plant Biology 2024年第1期66卷 17-19页

作者： Xuesong Cao Hongtao Xie Minglei Song Lianghui Zhao Hailiang Liu Guofu Li Jian‐Kang Zhu institute of Advanced biotechnology and School of Life Sciences Southern University of Science and TechnologyShenzhen 518055China Bellagen biotechnology Co.Ltd. Jinan 250000China institute for Regenerative Medicine Shanghai East HospitalTongji University School of MedicineShanghai 200123China Ministry of Agriculture and Rural Affairs Key Laboratory of Gene Editing Technologies Nanfan Research InstituteChinese Academy of Agricultural SciencesSanya 572024China

Gene-editing technologies have ushered in a significant advancement in plant genetics research and molecular breeding.However,a critical challenge hindering the widespread adoption of these technologies is the efficient delivery of gene-editing tools.The predominant methods for introducing these tools into plants typically involve Agrobacterium tumefaciens-mediated transformation or particle bombardment(Mao et al.,2019).Unfortunately,these traditional gene delivery methods require delicate and timeconsuming tissue culture procedures and show limited success,especially in medicinal and other less studied plants.A recent breakthrough is the development of the Cut-Dip-Budding(CDB)gene delivery system.The CDB system is highly effective for plants with root-suckering capabilities.It allows the delivery of transgenes and gene-editing tools into plants through hairy root induction followed by shoot regeneration from transformed hairy roots,bypassing the need for tissue culture processes(Cao et al.,2023).

关键词： transformation culture breakthrough

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Gene expression profiles in early leaf of rice(Oryza sativa)and foxtail millet(Setaria italica)

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The Crop Journal 2024年第3期12卷 776-787页

作者： Jing Sun Chen Deng Xiuru Dai Haoshu Li Liying Zhang Jingke Wang Hang Zhao Yirong Yang NghiVan Phung Zhiguo Zhang Pinghua Li Xuehui Sun Tiegang Lu biotechnology research institute Chinese Academy of Agricultural SciencesBeijing 100081China College of Agronomy Shandong Agricultural UniversityTai’an 271018ShandongChina Qingdao institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101ShandongChina

Plant anatomy is patterned early during leaf development which suggests studying the spatial–temporal transcriptomes of primordia will help identify critical regulative and functional genes.We successfully isolated the leaf primordia tissues from the C3grass rice and the C4grass foxtail millet by laser capture microdissection(LCM)and studied the gene expression throughout leaf developmental stages.Our data analysis uncovered the conserved expression patterns of certain gene clusters both in rice and foxtail millet during leaf development.We revealed genes and transcription factors involved in vein formation,stomatal development,and suberin accumulation.We identified 79 candidate genes associated with functional regulation of C4anatomy formation.Screening phenotype of the candidate genes revealed that knock-out of a putative polar auxin transport related gene NAL1 resulted significantly reduced veinal space in rice leaf.Our present work provides a foundation for future analyses of genes with novel functions in grasses and their role in leaf development,in particular the role in leaves with a contrasting C3vs.C4biosynthetic pathway.

关键词： Rice Foxtail millet Leaf development RNA-seq LCM

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Enhanced extracellular production of alpha-lactalbumin from Bacillus subtilis through signal peptide and promoter screening

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Food Science and Human Wellness 2024年第4期13卷 2310-2316页

作者： Yuqi Zhu Pengdong Sun Chunjian Li Yu Zhang Yu Wang Jingyuan Li Yanfeng Liu Jian Chen Yang Deng College of Food Science and Engineering Qingdao Agricultural UniversityQingdao 266109China Key Laboratory of Special Food Processing(Co-construction by Ministry and Province) Ministry of Agriculture Rural AffairsQingdao Agricultural UniversityQingdao 266109China Qingdao Special Food research institute Qingdao 266109China Science Center for Future Foods Engineering Research Center of Ministry of Education on Food Synthetic BiotechnologyJiangsu Province Engineering Research Center of Food Synthetic BiotechnologyJiangnan UniversityWuxi 214122China Key Laboratory of Carbohydrate Chemistry and biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi 214122China

Alpha-lactalbumin(α-LA)is a major whey protein found in breast milk and plays a crucial role in the growth and development of infants.In this study,Bacillus subtilis RIK1285 harboring AprE signal peptide(SP)was selected as the original strain for the production ofα-LA.It was found thatα-LA was identified in the pellet after ultrasonic disruption and centrifugation instead of in the fermentation supernatant.The original strain most likely only producedα-LA intracellular,but not extracellular.To improve the expression and secretion ofα-LA in RIK1285,a library of 173 homologous SPs from the B.subtilis 168 genome was fused with target LALBA gene in the pBE-S vector and expressed extracellularly in RIK1285.SP YjcN was determined to be the best signal peptide.Bands in supernatant were observed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and purified by nickel column to calculate the highest yield signal peptide.In addition,different promoters(P_(aprE),P_(43),and P_(glv))were compared and applied.The results indicated that the strain RIK1285-pBE-P_(glv)-YjcN-LALBA had the highestα-LA yield,reaching 122.04μg/mL.This study demonstrates successful expression and secretion of humanα-LA in B.subtilis and establishes a foundation for simulating breast milk for infant formulas and developing bioengineered milk.

关键词： Bacillus subtilis Alpha-lactalbumin Bioengineering milk Signal peptide Promoter screening

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Lateral root elongation in maize is related to auxin synthesis and transportation mediated by N metabolism under a mixed NO_(3)^(–) and NH_(4)^(+) supply

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Journal of Integrative Agriculture 2024年第3期23卷 1048-1060页

作者： Peng Wang Lan Yang Xichao Sun Wenjun Shi Rui Dong Yuanhua Wu Guohua Mi Key Laboratory of Tobacco Biology and Processing of Ministry of Agriculture and Rural Affairs Tobacco Research InstituteChineseAcademy of Agricultural SciencesQingdao 266101China Department of Plant Nutrition College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China College of Resources Hunan Agricultural UniversityChangsha 410128China Agro-Environmental Protection institute Ministry of Agriculture and Rural AffairsTianjin 300191China

A mixed nitrate (NO_(3)^(–)) and ammonium (NH_(4)^(+)) supply can promote root growth in maize (Zea mays),however,the changes in root morphology and the related physiological mechanism under different N forms are still unclear.Here,maize seedlings were grown hydroponically with three N supplied in three different forms (NO_(3)^(–)only,75/25 NO_(3)^(–)/NH_(4)^(+)and NH_(4)^(+)only).Compared with sole NO_(3)^(–)or NH_(4)^(+),the mixed N supply increased the total root length of maize but did not affect the number of axial roots.The main reason was the increased total lateral root length,while the average lateral root (LR) length in each axle was only slightly increased.In addition,the average LR density of 2nd whorl crown root under mixed N was also increased.Compared with sole nitrate,mixed N could improve the N metabolism of roots (such as the N influx rate,nitrate reductase (NR) and glutamine synthase (GS)enzyme activities and total amino content of the roots).Experiments with exogenously added NR and GS inhibitors suggested that the increase in the average LR length under mixed N was related to the process of N assimilation,and whether the NR mediated NO synthesis participates in this process needs further exploration.Meanwhile,an investigation of the changes in root-shoot ratio and carbon (C) concentration showed that C transportation from shoots to roots may not be the key factor in mediating lateral root elongation,and the changes in the sugar concentration in roots further proved this conclusion.Furthermore,the synthesis and transportation of auxin in axial roots may play a key role in lateral root elongation,in which the expression of ZmPIN1B and ZmPIN9 may be involved in this pathway.This study preliminarily clarified the changes in root morphology and explored the possible physiological mechanism under a mixed N supply in maize,which may provide some theoretical basis for the cultivation of crop varieties with high N efficiency.

关键词： maize NO_(3)^(–)/NH_(4)^(+)ratio lateral root elongation N assimilation indole-3-acetic acid

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New indole derivatives from endophytic fungus Colletotruchum sp. HK-08 originated from leaves of Nerium indicum

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Chinese Herbal Medicines 2024年第2期16卷 235-238页

作者： Huiqin Chen Hao Zheng Caihong Cai Hao Wang Cuijuan Gai Zhiqiong Tan Haofu Dai Wenli Mei Hainan Key Laboratory of research and Development of Natural Product from Li Folk Medicine Institute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural SciencesHaikou 571101China Hainan institute for Tropical agricultural Resources Haikou 571101China School of Life and Pharmaceutical Sciences Hainan UniversityHaikou 570228China

Objective: To study secondary metabolites from endophytic fungus Colletotruchum sp. HK-08 originated from the leaves of Nerium indicum.Methods: The compounds were isolated by various column chromatographic techniques, and their structures were elucidated by spectroscopic techniques [high resolution electrospray ionization mass spectroscopy(HRESIMS), one-dimensional(1D) and two-dimensional(2D) nuclear magnetic resonance spectroscopy(NMR)], as well as comparison with literature data. The Ellman method was used to determine the acetylcholinesterase(ACh E) inhibitory activity.Results: Four indole derivatives were identified from Colletotruchum sp. HK-08, including 6’-hydroxymonaspiloindole(1), 2-(2-oxoindolin-3-yl)ethyl 2-(4-hydroxyphenyl) acetate(2), 2-(2-oxoindolin-3-yl)ethyl 2-(2-hydroxyphenyl)acetate(3), and monaspiloindole(4). Compound 4 presented weak ACh E inhibitory activity with IC50value of(69.30 ± 6.27) μmol/L [tacrine as the positive control, with IC50value of(0.61 ± 0.07) μmol/L].Conclusion: Compounds 1–3 were new compounds, and compound 4 had weak ACh E inhibitory activity.

关键词： Colletotruchum sp. endophytic fungus indole derivatives Nerium indicum Mill. secondary metabolites

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Tuning electronic properties of cobalt phthalocyanines for oxygen reduction and evolution reactions

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Science China Chemistry 2024年第1期67卷 398-407页

作者： Jianlin Jiang Zhen Liu Shuaijun Pan Xinnian Xia Bing Qin Yang Hu Xuxu Wang Jiamin Lan Yu Gu Encai Ou Weijian Xu Joseph J.Richardson Rui Guo SINOPEC research institute of Petroleum Processing Co. Ltd.Beijing 100083China College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China College of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China Department of Chemical Engineering The University of MelbourneParkville 3010Australia College of Environmental Science and Engineering Hunan UniversityChangsha 410082China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Metal–phthalocyanines are a class of catalytically active materials promising in energy conversion and storage fields(e.g.,electrocatalysis).However,understanding and controlling the electrochemical properties in metal-phthalocyanine systems is challenging.Herein,we elucidate the electrocatalytic origins of a series of cobalt-phthalocyanine molecular catalysts and finetune their electronic properties at the atomic level,both experimentally and computationally.The interactions between the cobalt center and the local coordination environment are regulated by introducing either electron-donating or electron-withdrawing groups on the phthalocyanine ligand,and the spin-orbit splitting of cobalt is increased by~0.15 eV compared with the nonsubstituted ligand.Specifically,the aminated cobalt phthalocyanine-based electrocatalysts exhibit low free energies in the ratedetermining steps of the oxygen reduction(-1.68 eV)and oxygen evolution reactions(0.37 eV).This contributes to the high electrocatalytic activity(e.g.,a halfwave potential of 0.84 V and an overpotential of 0.30 V at 10 mAcm^(-2)),featuring a high selectivity of a four-electron pathway(i.e.,a negligible by-product of hydrogen peroxide).These catalysts also exhibit exceptional kinetic current density(Tafel slope of 100 mV dec^(-1))in oxygen reduction reactions,in addition to a superior power density(158 mWcm^(-2))and a high cycling stability(>1,300 cycles)in Zn-air batteries,outperforming the commercial Pt/C and/or RuO2counterparts.

关键词： interfacial wettability molecular catalysts carbon nanotubes density functional theory electrochemistry

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Methane Emission from Rice Fields:Necessity for Molecular Approach for Mitigation

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Rice science 2024年第2期31卷 159-178页

作者： Sujeevan RAJENDRAN Hyeonseo PARK Jiyoung KIM Soon Ju PARK Dongjin SHIN Jong-Hee LEE Young Hun SONG Nam-Chon PAEK Chul Min KIM Department of Horticulture Industry Wonkwang UniversityIksan 54538Korea Plant Molecular Biology and biotechnology research Center Gyeongsang National UniversityJinju 52828Korea Department of Southern Area Crop Science National Institute of Crop ScienceMiryang 50424Korea Department of agricultural biotechnology Seoul National UniversitySeoul 08826Korea Department of Plant Science Plant Genomics and Breeding InstituteResearch Institute of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Korea

Anthropogenic methane emissions are a leading cause of the increase in global averagetemperatures,often referred to as global warming.Flooded soils play a significant role in methaneproduction,where the anaerobic conditions promote the production of methane by methanogenicmicroorganisms.Rice fields contribute a considerable portion of agricultural methane emissions,as riceplants provide both factors that enhance and limit methane production.Rice plants harbor both methaneproducingand methane-oxidizing microorganisms.Exudates from rice roots provide source for methaneproduction,while oxygen delivered from the root aerenchyma enhances methane oxidation.Studies haveshown that the diversity of these microorganisms depends on rice cultivars with some genes characterizedas harboring specific groups of microorganisms related to methane emissions.However,there is still aneed for research to determine the balance between methane production and oxidation,as rice plantspossess the ability to regulate net methane production.Various agronomical practices,such as fertilizerand water management,have been employed to mitigate methane emissions.Nevertheless,studiescorrelating agronomic and chemical management of methane with productivity are limited.Moreover,evidences for breeding low-methane-emitting rice varieties are scattered largely due to the absence ofcoordinated breeding programs.research has indicated that phenotypic characteristics,such as rootbiomass,shoot architecture,and aerenchyma,are highly correlated with methane emissions.This reviewdiscusses available studies that involve the correlation between plant characteristics and methaneemissions.It emphasizes the necessity and importance of breeding low-methane-emitting rice varieties inaddition to existing agronomic,biological,and chemical practices.The review also delves into the idealphenotypic and physiological characteristics of low-methane-emitting rice and potential breeding techniques,drawing from studies conducted with diverse varieties,mutants,and transgenic p

关键词： methane emission rice breeding aerenchyma greenhouse gas radial oxygen loss

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