检索结果-南通市图书馆

Molecular mechanisms of plant adaptation to acid soils: A review

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2023年第1期33卷 14-22页

作者： Jing CHE Xue Qiang ZHAO ren fang shen State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

Acid soils are widespread and limit global plant ***(Al)/manganese(Mn)toxicity and phosphorus(P)deficiency are the major limiting factors affecting plant growth and productivity on acid ***,however,have evolved various strategies to adapt to these *** strategies include using both external and internal mechanisms to adapt to Al toxicity,regulating Mn uptake,translocation,and distribution to avoid Mn toxicity,and orchestrating a set of P transport mechanisms to efficiently take up P from the ***,we review the current state of knowledge about the molecular mechanisms of plant adaptation to these constraints in acid soils,focusing on the roles of transporters involved in Al/Mn tolerance and P *** manipulation combined with other biotechnology will contribute to the development of novel strategies to improve plant adaptation to acid *** molecular mechanisms of plant coadaptation to multiple stresses in acid soils are largely unknown and require further investigation.

关键词： aluminum toxicity gene manipulation,manganese toxicity multiple stresses phosphorus deficiency transporter

Transport of cadmium from soil to grain in cereal crops: A review

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2021年第1期31卷 3-10页

作者： Jian Feng MA ren fang shen Ji Feng SHAO Institute o f Plant Science and Resources Okayama UniversityChuo 2-20-1Kurashiki 710-0046Japan State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityLin'An 311300China

Due to rapid urbanization and industrialization, many soils for crop production are contaminated by cadmium(Cd), a heavy metal highly toxic to many organisms. Cereal crops such as rice, wheat, maize, and barley are the primary dietary source of Cd for humans, and reducing Cd transfer from soil to their grains is therefore an important issue for food safety. During the last decade, great progress has been made in elucidating the molecular mechanisms of Cd transport, particularly in rice. Inter-and intraspecific variations in Cd accumulation have been observed in cereal crops. Transporters for Cd have been identified in rice and other cereal crops using genotypic differences in Cd accumulation and mutant approaches. These transporters belong to different transporter families and are involved in the uptake, vacuolar sequestration, root-to-shoot translocation, and distribution of Cd. Attempts have been made to reduce Cd accumulation in grains by manipulating these transporters through overexpression or knockout of the transporter genes, as well as through marker-assisted selection breeding based on genotypic differences in Cd accumulation in the grains. In this review, we describe recent progress on molecular mechanisms of Cd accumulation in cereal crops and compare different molecular strategies for minimizing Cd accumulation in grains.

关键词： barley gene knockout gene overexpression genotypic difference maize rice transporter wheat

AtHAP5A regulates iron translocation in iron-deficient Arabidopsis thaliana

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2020年第12期62卷 1910-1924页

作者： Xiao fang Zhu Qi Wu Yu Ting Meng Ye Tao ren fang shen State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing210008China University of Chinese Academy of Sciences Beijing100049China

Iron(Fe)deficient plants employ multiple strategies to increase root uptake and root-to-shoot translocation of *** identification of genes that are responsible for these processes,and a comprehensive understanding of the regulatory effects of transcriptional networks on their expression,including transcription factors(TFs),is underway in Arabidopsis ***,we show that a Histone-or heme-associated proteins(HAP)transcription factor(TF),HAP5A,is necessary for the response to Fe deficiency in *** ex-pression was induced under Fe deficiency,and the lack of HAP5A significantly decreased Fe translocation from the root to the shoot,resulting in substantial chlorosis of the newly expanded leaves,compared with the wild-type(WT,Col-0).Further analysis found that the expression of a gene encoding nicotianamine(NA)synthase(NAS1)was dramatically decreased in the hap5a mutant,regardless of the Fe ***-one-hybrid and ChIP analyses suggested that HAP5A directly binds to the promoter region of ***,overexpression of NAS1 could rescue the chlorosis phenotype of hap5a in Fe deficient *** summary,a novel pathway was elucidated,showing that NAS1-dependent translocation of Fe from the root to the shoot is controlled by HAP5A in Fe-deficient Arabidopsis thaliana.

关键词： Arabidopsis translocation expanded

The endo-beta mannase MAN7 contributes to cadmium tolerance by modulating root cell wall binding capacity in Arabidopsis thaliana

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2023年第7期65卷 1670-1686页

作者： Qi Wu Yu Ting Meng Zhi Hang Feng ren fang shen Xiao fang Zhu State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China

The heavy metal cadmium(Cd) is detrimental to crop growth and threatens human health through the food chain. To cope with Cd toxicity,plants employ multiple strategies to decrease Cd uptake and its root-to-shoot translocation. However, genes that participate in the Cd-induced transcriptional regulatory network, including those encoding transcription factors, remain largely unidentified. In this study, we demonstrate that ENDO-BETA-MANNASE 7(MAN7) is necessary for the response of Arabidopsis thaliana to toxic Cd levels. We show that MAN7 is responsible for mannase activity and modulates mannose content in the cell wall, which plays a role in Cd compartmentalization in the cell wall under Cd toxicity conditions. Additionally,the repression of root growth by Cd was partially reversed via exogenous application of mannose,suggesting that MAN7-mediated cell wall Cd redistribution depends on the mannose ***, we identified a basic leucine zipper(bZIP) transcription factor, bZIP44, that acts upstream of MAN7 in response to Cd *** dual-luciferase assays indicated that bZIP44 directly binds to the MAN7 promoter region and activates its transcription. Loss of bZIP44 function was associated with greater sensitivity to Cd treatment and higher accumulation of the heavy metal in roots and ***, MAN7 overexpression relieved the inhibition of root elongation seen in the bzip44mutant under Cd toxicity conditions. This study thus reveals a pathway showing that MAN7-associated Cd tolerance in Arabidopsis is controlled by bZIP44 upon Cd exposure.

关键词： Arabidopsis thaliana bZIP44 cadmium cell wall MAN7 mannose

Protein sequence databases generated from metagenomics and public databases produced similar soil metaproteomic results of microbial taxonomic and functional changes

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2022年第4期32卷 507-520页

作者： Yi XIONG Lu ZHENG Xiangxiang MENG ren fang shen Ping LAN State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

Soil metaproteomics has excellent potential as a tool to elucidate the structural and functional changes in soil microbial communities in response to environmental alterations. However, soil metaproteomics is hindered by several challenges and gaps. Soil microbial communities possess extremely complex microbial composition, including many uncultured microorganisms without whole genome sequencing. Thus, how to select a suitable protein sequence database remains challenging in soil metaproteomics. In this study, the Public database and Meta-database were constructed using protein sequences from public databases and metagenomics, respectively. We comprehensively analyzed and compared the soil metaproteomic results using these two kinds of protein sequence databases for protein identification based on published soil metaproteomic raw data. The results demonstrated that many more proteins, higher sequence coverage, and even more microbial species and functional annotations could be identified using the Meta-database compared with those identified using the Public database. These findings indicated that the Meta-database was more specific as a protein sequence database. However, the follow-up in-depth metaproteomic analyses exhibited similar main results regardless of the database used. The microbial community composition at the genus level was similar between the two databases, especially the species annotations with high peptide-spectrum match and high abundance. The functional analyses in response to stress, such as the gene ontology enrichment of biological progress and molecular function and the key functional microorganisms, were also similar regardless of the database. Our analysis revealed that the Public database could also meet the demand to explore the functional responses of microbial proteins to some extent. This study provides valuable insights into the choice of protein sequence databases and their impacts on subsequent bioinformatic analysis in soil metapr

关键词： bioinformatics differentially accumulated protein functional annotation functional microorganism Meta-database microbial community microbial species Public database

Fertilization practices affect biological nitrogen fixation by modulating diazotrophic communities in an acidic soil in southern China

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2023年第2期33卷 301-311页

作者： Long GUO Chao WANG Manman ZHENG Wenxing LI Zejiang CAI Boren WANG Juan CHEN ren fang shen State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) University of Chinese Academy of Sciences Beijing 100049(China) Qiyang Red Soil Experimental Station Chinese Academy of Agricultural SciencesQiyang 426182(China) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education Hohai UniversityNanjing 210098(China)

Biological nitrogen(N)fixation(BNF)driven by diazotrophs is an important pathway for N input in agricultural ***,free-living BNF and its associated diazotrophic communities under different fertilization practices in acidic soils are poorly ***,we conducted a long-term(29 years)fertilization experiment to explore how fertilization affected free-living BNF via changing biotic and abiotic *** fertilization treatments included an unfertilized control(CK),chemical N,phosphorus(P),and potassium(K)fertilizers(NPK),NPK plus lime(NPKL),NPK plus straw(NPKS),NPK plus straw and lime(NPKSL),and NPK plus manure(NPKM).Compared with CK(1.51 nmol C_(2)H_(2)g^(-1)d^(-1)),BNF rate was significantly(P<0.05)higher in NPKM(1.99 nmol C_(2)H_(2)g^(-1)d^(-1))but lower in NPK(0.55 nmol C_(2)H_(2)g^(-1)d^(-1)),NPKL(0.61 nmol C_(2)H_(2)g^(-1)d^(-1)),and NPKS(0.69nmol C_(2)H_(2)g^(-1)d^(-1)).Similarly,chemical fertilization treatments without manure reduced the gene abundance(0.71×10^(8)-1.18×10^(8)copies g^(-1))andα-diversity(Shannon index,1.11-2.43)of diazotrophic communities,whereas the treatment with manure had a positive effect on diazotrophic abundance(3.23×10^(8)copies g^(-1))and Shannon index(3.36).Non-parametric multivariate analysis of variance(PERMANOVA)suggested that manure application(R^(2)=0.212,P=0.001)had a stronger influence on diazotrophic community composition than the addition of lime(R^(2)=0.115,P=0.019)or straw(R^(2)=0.064,P=0.161).Random forest modeling revealed that BNF rates can be significantly(P<0.05)explained by soil pH(9.9%),diazotrophic community attributes(composition,8.5%;Chao 1 index,8.1%;abundance,6.0%;Shannon index,5.7%),and soil total carbon(5.1%).Partial least squares path modeling(PLS-PM)suggested that the diazotrophic community attributes and soil properties mainly provided direct and indirect contributions to the variations in BNF rates,*** dominant genera,Pelomonas,Azospirillum,and Dechloromonas,were positiv

关键词： chemical fertilizer community composition free-living N fixation long-term fertilization practices manure application soil pH

In Memoriam: ZHAO Qiguo (1930–2023)

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2023年第1期33卷 2-2页

作者： ren fang shen Bo SUN Jia Bao ZHANG Taolin ZHANG Institute of Soil Science Chinese Academy of SciencesNo.71 East Beijing RoadNanjing 210008(China) Ministry of Agriculture and Rural Affairs of the People’s Republic of China No.11 Nongzhanguan NanliBeijing 100125(China)

ZHAO Qiguo,93,academician of Chinese Academy of Sciences,passed away in Nanjing on January 3,*** was a leading soil scientist in China and had long been devoted to the investigation of soil resources and ecological *** made outstanding contributions in promoting the development of soil science in China,ensuring national food security,and strengthening the construction of ecological *** was born on February 25,1930 in Wuhan,*** earned a *** the Department of Agronomy of Huazhong Agricultural College in *** that,Qiguo moved to a research position at the Institute of Soil Science,Chinese Academy of Sciences,where he worked for his entire academic career.

关键词： earned devoted strengthening

A Yield Function with Egg Shape for Geotechnique Materials

在线全文

学校读者我要写书评

暂无评论

A Yield Function with Egg Shape for Geotechnique Materials

Optimizing electronic structure through point defect engineering for enhanced electrocatalytic energy conversion

作者： ren fang shen Qian Chang Yanting (Yangtze River Scientific Research Institute,Wuhan,China)

A yield function with egg shape is suggested to characterize yield surface for geotechnique materials in this *** on the function,a generalized formulation that can include different yield functions used widely has be... 详细信息

关键词： rock and soil engineering material yield function geotechnique material

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 109-131页

作者： Wei Ma Jiahao Yao fang Xie Xinqi Wang Hao Wan Xiangjian shen Lili Zhang Menggai Jiao Zhen Zhou Interdisciplinary Research Center for Sustainable Energy Science and Engineering(IRC4SE2) School of Chemical EngineeringZhengzhou UniversityHenan450001China

Point defect engineering endows catalysts with novel physical and chemical properties,elevating their electrocatalytic *** introduction of defects emerges as a promising strategy,effectively modifying the electronic structure of active *** optimization influences the adsorption energy of intermediates,thereby mitigating reaction energy barriers,altering paths,enhancing selectivity,and ultimately improving the catalytic efficiency of *** elucidate the impact of defects on the electrocatalytic process,we comprehensively outline the roles of various point defects,their synthetic methodologies,and characterization ***,we consolidate insights into the relationship between point defects and catalytic activity for hydrogen/oxygen evolution and CO_(2)/O_(2)/N_(2) reduction reactions by integrating mechanisms from diverse *** underscores the pivotal role of point defects in enhancing catalytic *** last,the principal challenges and prospects associated with point defects in current electrocatalysts are proposed,emphasizing their role in advancing the efficiency of electrochemical energy storage and conversion materials.

关键词： Point defect engineering Doping Vacancy Electrocatalysis Electronic structure