检索结果-南通市图书馆

Journal of Forestry Research 2015年第2期26卷 435-446页

作者： Franck Sinsin Romain GlèlèKaka? Bettina Orthmann Brice Sinsin Laboratoire d’Ecologie Appliquée Faculté des Sciences AgronomiquesUniversité d’Abomey-Calavi03 BP 1974 CotonouBénin Laboratory of Biomathematics and Forest Estimations Faculté des Sciences AgronomiquesUniversité d’Abomey-Calavi03 BP 1974 CotonouBénin Institute of biosciences University of Rostock

Based on 120 stem discs collected during3 months of fieldwork along a 12 km route,the history of fires in the Wari Maro Forest（09 1000 N–02 1000E） over the past century in savanna woodland and dry forest was *** major ecological areas are characterized：one highly burnt zone located between two relative less burnt *** analyzing tree rings,246 fire scars were *** scars were caused by 51 fire years,occurring at a mean interval of 2.23 *** 1890 to1965,only 6 years with fires were recorded from sampled *** 1966,no year has passed without *** fire frequency point scale reached 14 *** was the case of Burkea africana,which has been identified as a species tolerant to fire and could be planted to create a natural *** contrast,Anogeissus leiocarpa is highly sensitive to fire,and in a dry forest ecosystem that burns seasonally,it requires a special conservation *** new concepts are described：the rebarking of trees after fire and Mean Kilometer Fire *** first concept was tested with daniellia oliveri（Rolfe） Hutch ＆ dalz trees,and the second concept was used to evaluate spatial fire *** demonstrate that savanna woodland and dry forest were subject to a degradation process caused by destructive fires related to vegetation cover clearance and illegal logging.

关键词： Fire ecology Tree-rings Savanna woodland dry forest Conservation strategies

Multifaceted roles of ASB proteins and its pathological significance

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2018年第5期13卷 376-388页

作者： Vivek Vishnu Anasa Palaniyandi Ravanan Priti Talwar Apoptosis and Cell Survival Research Lab Department of Biosciences School of Biosciences and Technology VIT University Vellore Tamil Nadu 632014 lndia

BACKGROUNd： Post-translational （PT） modification in cells regulates many intracellular events like signal transduction, transcription, cell cycle, protein quality control, apoptosis and cellular development. Ubiquitination is one of the PT modifications which ftmctions as a marker for degradation of target proteins by the proteasome and as a regulatory mechanism for several signalling pathways. The ubiquitination mechanism requires multiple enzymes, including El, E2, and E3 ligases. Among them, E3 ligases play a major role in recognizing target proteins and an essential feature of protein homeostatic mechanisms within the cell. Most of the ASB （ankyrin repeat SOCS box） proteins fimction as RING family of E3 ubiquitin ligases characterized by the presence of two conserved domains N-terminal ankyrin repeat and C-terminal SOCS box domain METHOdS and RESULTS： Current studies have shown that some ASBs function as important regulators of several signalling pathways. This review gives an overview of ASB proteins on numerous cellular processes such as insulin signalling, spermatogenesis, myogenesis and in cellular development. Including various pathological situations, such as cancer, primary open-angle glaucoma, and inflammation, indicating that ASBs has important functions in both normal and pathological development CONCLUSIONS： This article provides a precise comprehensive focus on ASBs protein structure, its biological functions, and their pathological significance.

关键词： ankyrin repeat SOCS box E3 ligase cancer spermatogenesis cellular development

A Novel RGL2-dOF6 Complex Contributes to Primary Seed dormancy in Arabidopsis thaliana by Regulating a GATA Transcription Factor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2017年第10期10卷 1307-1320页

作者： Pratibha Ravindran Vivek Verma Petra Stamm Prakash P. Kumar department of Biological Sciences Faculty of Science National University of Singapore Singapore 117543 Singapore present address: department of biosciences Durham University South Road Durham DH1 3LE UK

The dELLA protein RGA-LIKE2 （RGL2） is a key transcriptional repressor of gibberellic acid （GA） signaling that regulates seed germination. We identified GATA12, a gene encoding a GATA-type zinc finger transcription factor, as one of the downstream targets of RGL2 in Arabidopsis thaliana. Our data show that freshly harvested （unstratified） seeds of GATA 12 antisense suppression lines have reduced dormancy compared with the wild-type, while ectopic expression lines show enhanced seed dormancy. We show that GATA12 expression is negatively regulated by GA, and its transcript levels decline dramatically under dormancy- breaking conditions such as dry storage and cold stratification of seeds. GATA12 promoter has several GAMYB- and dOF-associated motifs that are known to be GA- and RGL2-responsive, respectively. Chromatin immunoprecipitation assay showed that a protein complex containing RGL2 can bind to GATA12 promoter and thereby regulate its expression. RGL2 lacks a dNA binding domain and requires a transcription factor to induce GATA12 expression. Our data show that this RGL2-containing protein complex includes dNA BINdING1 ZINC FINGER6 （dOF6）, which is a known negative regulator of germination in freshly harvested seeds. We further show that this novel RGL2-dOF6 complex is required for activating GATA12 expression, thus revealing a molecular mechanism to enforce primary seed dormancy.

关键词： seed germination primary dormancy dELLA RGL2 dOF6 gibberellin

Looping by RNA: dynamic control of the chromatin loop by long non-coding RNAs in plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2021年第9期14卷 1430-1432页

作者： Junghyun Kim Sibum Sung department of Molecular biosciences The University of Texas at AustinAustinTX 78712USA

In eukaryotes,the three-dimensional(3d)structure of the genome plays a critical role in the transcriptional *** though the 3d structure of the genome is mainly determined by dNA and protein components,increasing evidenee has demonstrated that RNA also occupies a large portion of chromatin and in flue nces genomic architecture(Ramirez-Colmenero et al.,2020;Wierzbicki et al.,2021).Long non-coding RNA(IncRNA)is a class of non-coding RNAs longer than 200 nucleotides but that lacks protein-coding *** are key regulators of gene expression through their capacity to harbor regulatory proteins and to establish molecular interactions.

关键词： potential harbor

diets, functional foods, and nutraceuticals as alternative therapies for inflammatory bowel disease: Present status and future trends

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2018年第25期24卷 2673-2685页

作者： Mohammad Al Mijan Beong Ou Lim department of Integrated biosciences College of Biomedical & Health Science Konkuk University

Inflammatory bowel disease(IBd) is a serious health concern among western societies. The disease is also on the rise in some East Asian countries and in Australia. Health professionals and dietitians around the world are facing an unprecedented challenge to prevent and control the increasing prevalence of IBd. The current therapeutic strategy that includes drugs and biological treatments is inefficient and are associated with adverse health consequences. In this context, the use of natural products is gaining worldwide attention. In vivo studies and clinical evidence suggest that wellplanned dietary regimens with specific nutrients can alleviate gastrointestinal inflammation by modulating inflammatory cytokines, such as tumor necrosis factor α(TNF-α), interleukin 1(IL-1), IL-6, IL-1β, and IL-10. Alternatively, the avoidance of high-fat and highcarbohydrate diets is regarded as an effective tool to eliminate the causes of IBd. Many functional foods and bioactive components have received attention for showing strong therapeutic effects against IBd. Both animal and human studies suggest that bioactive functional foods can ameliorate IBd by downregulating the pro-inflammatory signaling pathways, such as nuclear factor κB, STAT1, STAT6, and pro-inflammatory cytokines, including IL-1β, IL-4, IL-6, COX-2, TNF-α, and interferon γ. Therefore, functional foods and diets have the potential to alleviate IBd by modulating the underlying pathogenic mechanisms. Future comprehensive studies are needed to corroborate the potential roles of functional foods and diets in the prevention and control of IBd.

关键词： Inflammatory bowel disease colitis diets functional foods bioactive compounds inflammatory cytokines alternative therapy

Synthesis, antibacterial and anti-inflammatory activity of bis(indolyl)methanes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第1期27卷 16-20页

作者： Santhisudha Sarva Jayaprakash Soora Harinath Siva Prasad Sthanikam Selvarajan Ethiraj Mohanasrinivasan Vaithiyalingam Suresh Reddy Cirandur department of Chemistry Sri Venkateswara University School of biosciences and Technology VIT University

A series of bioactive bis（indolyl）methanes are synthesized by one-pot green reaction of indole with various substituted aldehydes by microwave irradiation under solvent free conditions. The antibacterial activity against Staphylococcus aureus and anti-inflammatory activity of the synthesized bis（indolyl）-methanes are evaluated in vitro and compared to standard drugs tetracycline and diclofenac,respectively. The majority of the compounds showed good antibacterial and anti-inflammatory ***, compounds 3j, 3i, 3k and 3g exhibited much higher anti-inflammatory activity than the standard diclofenac drug and thus qualify for clinical trials to be used as an anti-inflammatory compound.

关键词： Bis(indolyl)methanes Microwave irradiation Antibacterial activity Anti-inflammatory activity

In vitro gastrointestinal digestion study of two wheat cultivars and evaluation of xylanase supplementation

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2015年第3期6卷 355-368页

作者： Mickael Lafond Bernard Bouza Sandrine Eyrichine Friedrich Rouffineau Luc Saulnier Thierry Giardina Estelle Bonnin Aurélie Preynat iSm2-biosciences UMR 7313 Aix Marseille Université Adisseo France S.A.S. Centre d'Expertise et de Recherche en Nutrition INRA UR 1268-BiopolymeresInteractions-Assemblages

Background： The filamentous fungus Talaromyces versatifis is known to improve the metabolizable energy of wheat- based poultry diets thanks to its ability to produce a pool of CAZymes and particularly endo-β（1,4）-xylanases. In order to appreciate their in vivo mode of action, the supplementation effect of two of its xylanases, Xynd and XynB from families GH10 and GHll respectively, have been evaluated on two different wheat cultivars Caphorn and Isengrain, which were chosen amongst 6 varieties for their difference in non starch polysaccharides content and arabinoxylan composition. Results： Polysaccharides digestion was followed during 6 h along the digestive tract using the TNO gastrointestinal model-1, to mimic monogastric metabolism. Polysaccharide degradation appeared to occur mainly at the jejunal level and was higher with Isengrain than with Caphorn. For both cultivars, Xynd and XynB supplementation increased notably the amount of reducing end sugars into the jejuno-ileal dialysates, which has been confirmed by a valuable increase of the soluble glucose into the jejunal dialysates. Conclusions： The amounts of arabinose and xylose into the dialysates and ileal deliveries increased consequently mainly for Caphorn, suggesting that Xynd and XynB supplementation in wheat-based diet could alleviate the anti-nutritional effects of arabinoxylans by limiting the physical entrapment of starch and could increase the available metabolizable energy.

关键词： in vitro TNO gastrointestinal model-1 Talaromyces versatilis Wheat cultivars XynB Xynd

Crosstalk Complexities between Auxin, Cytokinin, and Ethylene in Arabidopsis Root development： From Experiments to Systems Modeling, and Back Again

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2017年第12期10卷 1480-1496页

作者： Junli Liu Simon Moore Chunli Chen Keith Lindsey department of biosciences Durham University South Road Durham DH1 3LE UK College of Life Science and Technology Huazhong Agricultural University Wuhan 430070 China These authors contributed equally to this article.

Understanding how hormones and genes interact to coordinate plant growth in a changing environment is a major challenge in plant developmental biology. Auxin, cytokinin, and ethylene are three important hormones that regulate many aspects of plant development. This review critically evaluates the crosstalk between the three hormones in Arabidopsis root development. We integrate a variety of experimental data into a crosstalk network, which reveals multiple layers of complexity in auxin, cytokinin, and ethylene crosstalk. In particular, data integration reveals an additional, largely overlooked link between the ethylene and cytokinin pathways, which acts through a phosphorelay mechanism. This proposed link addresses outstanding questions on whether ethylene application promotes or inhibits receptor kinase activity of the ethylene receptors. Elucidating the complexity in auxin, cytokinin, and ethylene crosstalk requires a combined experimental and systems modeling approach. We evaluate important modeling efforts for establishing how crosstalk between auxin, cytokinin, and ethylene regulates patterning in root develop- ment. We discuss how a novel methodology that iteratively combines experiments with systems modeling analysis is essential for elucidating the complexity in crosstalk of auxin, cytokinin, and ethylene in root development. Finally, we discuss the future challenges from a combined experimental and modeling perspective.

关键词： Arabidopsis auxin cytokinin ethylene hormonal crosstalk spatiotemporal modeling

The IBI1 Receptor ofβ-Aminobutyric Acid Interacts with VOZ Transcription Factors to Regulate Abscisic Acid Signaling and Callose-Associated defense

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2020年第10期13卷 1455-1469页

作者： Roland E.Schwarzenbacher Grace Wardell Joost Stassen Emily Guest Peijun Zhang Estrella Luna Jurriaan Ton P3 Institute for Plant and Soil Biology Department of Animal and Plant SciencesThe University of SheffieldSheffield S102TNUK School of biosciences University of BirminghamBirmingham B152TTUK

Extemal and internal signals can prime the plant immune system for a faster and/or stronger response to pathogen attack.β-aminobutyric acid(BABA)is an endogenous stress metabolite that induces broad-spectrum disease resistance in *** perception in Arabidopsis is mediated by the aspartyl tRNA synthetase IBI1,which activates priming of multiple immune responses,including callose-associated cell wall defenses that are under control by abscisic acid(ABA).However,the immediate signaling components after BABA perception by IBI1,as well as the regulatory role of ABA therein,remain ***,we have studied the early signaling events controlling IBI1-dependent BABA-induced resistance(BABAIR),using untargeted transcriptome and protein interaction *** analysis revealed that IBI1-dependent expression of BABA-IR against the biotrophic oomycete Hyaloperonospora arabidopsidis is associated with suppression of ABA-inducible abiotic stress *** interaction studies identified the VOZ1 and VOZ2 transcription factors(TFs)as IBI1-interacting partners,which are transcrip-tionally induced by ABA but suppress pathogen-induced expression of ABA-dependent ***,we show that VOZ TFs require nuclear localization for their contribution to BABA-IR by mediating augmented expression of callose-associated ***,our study indicates that the IBI1-VOZ signaling module channels pathogen-induced ABA signaling toward cell wall defense while simultaneously suppressing abiotic stress-responsive genes.

关键词： IBI1 priming abscisic acid β-aminobutyric acid callose E-MTAB-8720

Electroactive and antibacterial wound dressings based on Ti_(3)C_(2)T_(x)MXene/poly(ε-caprolactone)/gelatin coaxial electrospun nanofibrous membranes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

nano Research 2023年第7期16卷 9672-9687页

作者： Shixin Xu Chen du Miaomiao Zhang Ruoying Wang Wei Feng Chengwei Wang Qinsong Liu Wen Zhao Key Laboratory for Space biosciences and Biotechnology School of Life SciencesNorthwestern Polytechnical UniversityXi’an 710072China

Endogenous electric fields(EFs)are capable of regulating the behaviors of skin cells in wound ***,majority of current dressings are primarily engaged in the passive repair of defective tissue,as they lack the ability to actively respond to physiological electrical *** this work,a series of nanofibrous membranes(NFMs)were fabricated by coaxial electrospinning,combining the good mechanical properties of poly(ε-caprolactone)(PCL),the bioactivity of gelatin and the electroactivity of Ti_(3)C_(2)T_(x)MXene,as electroactive and antibacterial dressings for cutaneous wound *** obtained NFMs exhibited suitable mechanical properties and hydrophilicity,excellent electroactivity,antibacterial activity,and ***,Ti_(3)C_(2)T_(x)MXene/PCL/gelatin-6(MPG-6,6 wt.%of Ti_(3)C_(2)T_(x)MXene in sheath spinning liquids)showed the optimal conductivity and antibacterial ***,this scaffold significantly promoted the adhesion,proliferation,and migration of NIH 3T3 cells under the electrical stimulation(ES).The in vivo evaluation in a full-thickness wounds defect model demonstrated that the MPG-6 films significantly accelerated wound closure,increased granulation tissue formation,increased collagen deposition,and promoted wound *** summary,the versatile scaffold is expected to be an ideal candidate as wound dressings due to its ability to promote the transmission of physiological electrical signals and thus improved the therapeutic outcomes of wound regeneration.

关键词： electroactive nanofibers coaxial electrospinning nanofibrous membranes(NFMs) antibacterial activity wound dressings