检索结果-南通市图书馆

Exogenous cytokinin application to Actinidia chinensis var. deliciosa ‘Hayward’ fruit promotes fruit expansion through water uptake

引用

Horticulture Research 2017年第1期4卷 131-141页

作者： Simona Nardozza Helen L Boldingh Mark W Wohlers Andrew P Gleave Zhiwei Luo Guglielmo costa Elspeth A MacRae Michael J clearwater annette c richardson The New Zealand Institute for Plant&Food Research Limited(PFR) Mt Albert Research CentrePrivate Bag 92169AucklandNew Zealand PFR Ruakura Research CentrePrivate Bag 3123HamiltonNew Zealand Dipartimento di Scienzie Agrarie Universitàdi BolognaVia Fanin 46Bologna40127Italy PFR Te Puke Research CentreTe Puke3182New Zealand PFR Kerikeri Research CentrePrivate Bag 23KerikeriNew Zealand Scion Te Papa Tipu Innovation ParkPrivate Bag 3020RotoruaNew Zealand University of Waikato School of SciencePrivate Bag 3105HamiltonNew Zealand

Exogenous application of a cytokinin-like compound forchlorfenuron(cPPU)can promote fruit growth,although often at the expense of dry matter(DM),an important indicator of fruit *** chinensis ***‘Hayward’fruit are very responsive to cPPU treatments,but the mechanism underlying the significant fruit weight increase and associated decrease in DM is *** this study,we hypothesised that cPPU-enhanced growth increases fruit carbohydrate demand,but limited carbohydrate supply resulted in decreased fruit *** fruit development,cPPU effects on physical parameters,metabolites,osmotic pressure and transcriptional changes were assessed under conditions of both standard and a high carbohydrate *** showed that cPPU increased fruit fresh weight but the dramatic DM decrease was not carbohydrate *** glucose and fructose concentrations contributed to an increase in soluble carbohydrate osmotic pressure,which was correlated with increased water accumulation in cPPU-treated fruit and up-regulation of water channel aquaporin gene PIP2.4 at 49 days after *** analysis suggested that the molecular mechanism contributing to increased glucose and fructose concentrations was altered by carbohydrate *** standard carbohydrate supply,the early glucose increase in cPPU fruit was associated with reduced starch synthesis and increased starch *** carbohydrate supply was high,the early glucose increase in cPPU fruit was associated with a general decrease in starch synthesis but up-regulation of vacuolar invertase and fructokinase *** conclude that cPPU affected fruit expansion by increasing the osmotically-driven water uptake and its effect was not carbohydrate supply-limited.

关键词： cPPU Actinidia expansion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Large-scale spatial synchrony and the stability of forest biodiversity revisited

引用

Journal of Plant Ecology 2012年第1期5卷 52-63页

作者： annette M.Ostling Department of Ecology and Evolutionary Biology University of Michigan830 North University AvenueAnn ArborMI 48109-1048USA

Aims Mechanisms contributing to species coexistence have at least one of two modes of action:(i)stabilization of populations through restoring forces and(ii)equalization of fitness across individuals of different ***,ecologists have begun gleaning the relative roles of these by testing the predictions of neutral theory,which predicts the properties of communities under pure fitness *** null hypothesis was rejected for forests of southern Ontario based on large-scale(;100 km)spatial synchrony evident in the fossil pollen record over the entire Holocene,and the argument that a species’relative abundance would instead vary independently at such distances in the absence of stabilizing *** test of neutral theory was criticized based on the idea that the synchrony might be produced by dispersal ***,I revisit this test of neutral theory by explicitly calculating the synchrony expected in these forests using a novel simulation method enabling examination of the distribution of a species over large spatial and temporal *** A novel neutral simulation algorithm tracking only the focal species was used to calculate the neutral expectation for spatial synchrony properties examined empirically by clark and MacLachlan[(2003)Stability of forest *** 423:635–8]using fossil pollen data from eight lake *** coefficient of variation(cV)in a species’relative abundance across the eight sites(initiated at about 10%with a small cV)was calculated for 10 runs over a 10000 year time *** cV reflects the level of spatial synchrony in that less synchronous dynamics should lead to more variation across space(a higher equilibrium cV),and in particular,a greater increase in the cV over time from a small initial value.A‘two dimensional t’fat-tailed dispersal kernel was assumed with parameters set to the median derived from seed trap data for deciduous wind-dispersed *** of results to assumed dispersal

关键词： neutral theory community dynamics turnover

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Use of non-timber forest products from invasive alien Prosopis species(mesquite) and native trees in South Africa: implications for management

引用

Forest Ecosystems 2015年第3期2卷 197-207页

作者： Ross T Shackleton David c Le Maitre Brian W van Wilgen David M richardson centre for Invasion Biology Department of Botany and ZoologyStellenbosch University centre for Invasion Biology Natural Resources and the EnvironmentCSIR

Background: Prosopis species have been introduced to many areas outside their native range to provide benefits to local communities. Several Prosopis species and their hybrids(hereafter "mesquite") have, however, become naturalised and invasive and now generate substantial costs. Management options are limited because of the complex conflicts of interest regarding benefits and costs. Management policies and strategies must take account of such conflicts, but further insights are needed on the dimensions of uses and impacts before such information can be usefully applied. current policy in South Africa allows for the growth and use of mesquite in one province,but not in others where its control is mandatory. We report on a study to quantify the direct use and perceptions of non-timber forest products(NTFPs) from mesquite and native trees in South ***: Semi-structures household interviews were conducted with various stakeholder groups to identify what tree products are used, to ascertain amounts used as well as to gauge perceptions of natural resource use between different tree species and use over ***: The direct household use value of native trees was higher than that of mesquite, and local stakeholders attached greater value to products from native trees than from mesquite. Therefore, native trees are and will still be preferentially harvested, and mesquite is unlikely to offer protection to native species by providing an alternative source of products. Mesquite pods do, however, provide valuable additional resources(fodder and medicinal products). The use of both native trees and mesquite is decreasing as the incomes of poorer households rise and as alternative energy sources become available. The benefits and reliance on mesquite are not as high as previously assumed and the impacts from mesquite invasions create large problems for local ***: This study provides further evidence that the impacts of mesquite exceed the benefi

关键词： Biological invasions conflicts of interests cost v

来源：

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

c:N:P stoichiometry and nutrient limitation of the soil microbial biomass in a grazed grassland site under experimental P limitation or exces

引用

Ecological Processes 2012年第1期1卷 66-76页

作者： Bryan S Griffiths annette Spilles Michael Bonkowski Teagasc Environment Research CentreJohnstown CastleWexfordCoWexfordIreland current address:SAc King's BuildingsWest Mains RoadEdinburgh EH93JGUK Mathematisch Naturwissenschaftliche Fakultät der Universität zu Köln Zoologisches Institut Abt.TerrestrischeÖkologieBiowissenschaftliches ZentrumOtto-Fischer-Str.6D-50674KölnGermany

Introduction:The availability of essential nutrients,such as nitrogen(N)and phosphorus(P),can feedback on soil carbon(c)and the soil microbial *** cycles can be supplemented by agricultural fertiliser addition,and we determined whether the stoichiometry and nutrient limitation of the microbial biomass could be affected by an unbalanced nutrient ***:Samples were taken from a long-term trial(in effect since 1968)with annual applications of 0,15 and 30 kg P ha^(−1) with constant N and *** and microbial biomass cNP contents were measured and nutrient limitation assessed by substrate-induced *** regression and discriminant analyses were used to identify the variables explaining nutrient ***:Soil and biomass cNP increased with increasing P fertiliser,and there was a significant,positive,correlation between microbial biomass P and biomass c,apart from at the highest level of P fertilisation when the microbial biomass was over-saturated with *** molar ratios of c:N:P in the microbial biomass remained constant(homeostatic)despite large changes in the soil nutrient *** growth was generally limited by c and N,except in soil with no added P when c and P were the main limiting nutrients.c,N and P,however,did not explain all the growth limitation on the soils with no added ***:Increased soil c and N were probably due to increased net primary *** results confirm that c:N:P ratios within the microbial biomass were constrained(***)under near optimum soil *** with no added P were characterised by strong microbial P limitation and soils under high P by over-saturation of microorganisms with *** changes in biomass c:P can be indicative of nutrient limitation within a site.

关键词： carbon Nitrogen Nutrient limitation Phosphorus Soil microbial biomass Stoichiometry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acacia mangium Willd: benefits and threats associated with its increasing use around the world

引用

Forest Ecosystems 2019年第1期6卷 13-25页

作者： Lydie-Stella Koutika David M.richardson cRDPI Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles centre for Invasion Biology Department of Botany & Zoology Stellenbosch University

Background: Acacia mangium, a fast-growing tree native to parts of Indonesia, Papua New Guinea and Australia,has been cultivated outside its native environment and introduced into humid tropical lowland regions of Asia,South America and Africa over the last few decades. It is a multipurpose tree used in agroforestry, forestry and for restoration of degraded lands. It is also highly invasive in many regions where it has been introduced outside its native range. This paper reviews evidence of its obvious benefits and its negative impacts on ***: A literature review on Australian acacias and especially on A. mangium was undertaken to highlight both benefits and threats associated with their increasing worldwide use outside their native ***: Through N_2 fixed from the atmosphere, A. mangium improves soil fertility, especially by increasing N status and soil c accretion when introduced to N-limited areas; it thus has the potential to restore nutrient cycling in degraded systems. No studies have, however, been done to assess the effectiveness of A. mangium in restoring biodiversity of degraded lands. Most Australian acacias have traits that facilitate invasiveness, and 23 species have been recorded as invasive to date. A. mangium has been reported as invasive in Asia, Indonesia, Pacific Islands,Indian Ocean Islands, southern Africa and Brazil. Research on other invasive Australian acacias in several parts of the world has elucidated the types of impacts that are likely in different types of ecosystems and key options for mitigating ***: A. mangium has the potential to restore nutrient cycling in degraded systems, but is highly invasive wherever it is planted. Many parts of the world have a large invasion debt for this species. Experience with other invasive acacias around the world suggests a suite of interventions that could be used to reduce invasions and mitigate impacts. careful risk assessments should be undertaken prior to

关键词： Biodiversity Biological invasions c sequestration Soil N status Tree invasions

来源：

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

Erroneous use of Statistics behind claims of a Major Solar Role in Recent Warming

引用

Research in Astronomy and Astrophysics 2022年第12期22卷 224-231页

作者： Mark T.richardson Rasmus E.Benestad Jet Propulsion Laboratory California Institute of TechnologyPasadenaCA 91109USA Department of Atmospheric Science Colorado State UniversityFt CollinsCO 90732USA Norwegian Meteorological Institute NO-0313 OsloNorway

In a study that attempted to relate solar and human activity to Earth's recent temperature change,connolly et *** a basic error in the choice of statistical methods and so overreported the effect of the Sun.A major theme of their study was that there are many data sets of past solar activity,and some of these allegedly provide statistical evidence of“most of the recent global warming being due to changes in solar activity.”We avoid methods that are known to give inaccurate results and show that for 1970–2005 Northern Hemisphere land the corrected solar attribution fraction is-7%to+5%,compared with values of up to 64%reported in connolly et *** higher values are entirely due to mistaken application of ***,we cannot test truly“recent”global warming since most of their solar data sets end before 2015,and two finish in the 1990s,but all tested post-1970 periods show similarly small solar *** solar-climate linkage is an area of fascinating and ongoing research with rigorous technical *** argue that instead of repeating errors,they should be acknowledged and corrected so that the debate can focus on areas of legitimate scientific uncertainty.

关键词： Earth (Sun:)solar-terrestrial relations Physical Data and Processes

来源：

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

Multi-Wavelength Optical Packet Routing Technologies Based on Superstructured Fiber Bragg Gratings

引用

光学学报 2003年第S1期23卷 699-700页

作者： Benn c. Thomsen Peh c. Teh Morten Ibsen David J. richardson Optoelectronics Research centre University of Southampton Southampton SO17 1BJ UK.Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ UK.Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ UK.Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ UK.

A WDM compatible Edge-to-Edge Self-Routed optical packet switched network that simplifies the optical processing is proposed. The system employs all-optical packet label generation and recognition using coded superstr... 详细信息

关键词： WDM in of as OcL that Multi-Wavelength Optical Packet Routing Technologies Based on Superstructured Fiber Bragg Gratings on

来源：

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

Overexpression of TaNAc69 Leads to Enhanced Transcript Levels of Stress Up-Regulated Genes and Dehydration Tolerance in Bread Wheat

引用

Molecular Plant 2011年第4期4卷 697-712页

作者： Gang-Ping Xue Heather M. Way Terese richardson Janneke Drenth Priya A. Joyce c.Lynne Mclntyre cSIRO Plant Industry 306 Carmody Road St Lucia QLD 4067 Australia cSIRO Plant Industry GPO 1600 Canberra ACT 2601 Australia BSES Limited 50 Meiers Road Indooroopilly QLD 4068 Australia

NAc proteins are plant-specific transcription factors and enriched with members involved in plant response to drought stress. In this study, we analyzed the expression profiles of TaNAc69 in bread wheat using Affymetrix Wheat Genome Array datasets and quantitative RT-PcR. TaNAc69 expression was positively associated with wheat responses to both abiotic and biotic stresses and was closely correlated with a number of stress up-regulated genes. The functional analyses of TaNAc69 in transgenic wheat showed that TaNAc69 driven by a barley drought-inducible HvDhn4s promoter led to marked drought-inducible overexpression of TaNAc69 in the leaves and roots of transgenic lines. The HvDhn4s：Ta- NAc69 transgenic lines produced more shoot biomass under combined mild salt stress and water-limitation conditions, had longer root and more root biomass under polyethylene glycol-induced dehydration. Analysis of transgenic lines with constitutive overexpression of TaNAc69 showed the enhanced expression levels of several stress up-regulated genes. DNA-binding assays revealed that TaNAc69 and its rice homolog （ONAc131） were capable of binding to the promoter elements of three rice genes （chitinase, ZlM, and glyoxalase I） and an Arabidopsis glyoxalase I family gene, which are homologs of TaNAc69 up-regulated stress genes. These data suggest that TaNAc69 is involved in regulating stress upregulated genes and wheat adaptation to drought stress.

关键词： NAc transcription factor gene regulation transgenic abiotic stress drought wheat.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hydrocarbon indication in Rio Bonito Formation sandstone:Implication for cO_(2)storage in São Paulo,Brazil

引用

Energy Geoscience 2024年第1期5卷 331-341页

作者： richardson M.Abraham-A Haline V.Rocha Saulo B.de Oliveira colombo c.G.Tassinarri Orlando c.da Silva Institute of Energy and Environment University of São PauloSão PauloBrazil Research centre for Greenhouse Gas Innovation University of São PauloSão PauloBrazil

São Paulo State has witnessed cO_(2)storage-based investigations considering the availability of suitable geologic structures and proximity to primary cO_(2)source sinks related to bioenergy and carbon capture and storage(BEccS)*** current study presents the hydrocarbon viability evaluations and cO_(2)storage prospects,focusing on the sandstone units of the Rio Bonito *** objective is to apply petrophysical evaluations with geochemical inputs in predicting future hydrocarbon(gas)production to boost cO_(2)storage within the study *** study used data from eleven wells with associated wireline logs(gamma ray,resistivity,density,neutron,and sonic)to predict potential hydrocarbon accumulation and fluid mobility in the investigated *** samples(shale and carbonate)obtained from depths>200 m within the study location have shown bitumen *** geochemistry data of the Rio Bonito Formation shale beds suggest they are potential hydrocarbon source rocks and could have contributed to the gas accumulations within the sandstone *** drilled well data,e.g.,cB-1-SP and TI-1-SP,show hydrocarbon(gas)presence based on the typical resistivity and the combined neutron-density responses at depths up to 3400 m,indicating the possibility of other hydrocarbon members apart from the heavy oil(bitumen)observed from the near-surface rocks *** the three-dimensional(3-D)model,the free fluid indicator(FFI)is more significant towards the southwest and southeast of the area with deeper depths of occurrence,indicating portions with reasonable hydrocarbon recovery rates and good prospects for cO_(2)injection,circulation and permanent ***,future studies based on contemporary datasets are required to establish the hydrocarbon viability further,foster gas production events,and enhance cO_(2)storage possibilities within the region.

关键词： ParanáBasin Hydrocarbon indication Sandstone reservoirs Rio Bonito Formation cO_(2)storage Hydrocarbon recovery factor Fluid injection rate

来源：

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

Delayed Antarctic melt season reduces albedo feedback

引用

National Science Review 2023年第9期10卷 236-246页

作者： Lei Liang Huadong Guo Shuang Liang Xichen Li John c.Moore Xinwu Li Xiao cheng Wenjin Wu Yan Liu annette Rinke Gensuo Jia Feifei Pan chen Gong Key Laboratory of Digital Earth Science Aerospace Information Research Institute Chinese Academy of Sciences 2. International Research Center of Big Data for Sustainable Development Goals Institute of Atmospheric Physics Chinese Academy of Sciences college of Global change and Earth System Science Beijing Normal University Arctic centre University of Lapland cAS center for Excellence in Tibetan Plateau Earth Sciences School of Geospatial Engineering and Science Sun Yat-sen University Alfred Wegener Institute Helmholtz centre for Polar and Marine Research Department of Geography University of North Texas

Antarctica’ s response to climate change varies greatly both spatially and *** melting impacts mass balance and also lowers surface *** use a 43-year record(from 1978 to 2020) of Antarctic snow melt seasons from space-borne microwave radiometers with a machine-learning algorithm to show that both the onset and the end of the melt season are being ***-causality analysis shows that melt end is delayed due to increased heat flux from the ocean to the atmosphere at minimum sea-ice extent from warming *** onset is Granger-caused primarily by the turbulent heat flux from ocean to atmosphere that is in turn driven by sea-ice *** snowmelt season leads to a net decrease in the absorption of solar irradiance,as a delayed summer means that higher albedo occurs after the period of maximum solar radiation,which changes Antarctica’s radiation balance more than sea-ice cover.

关键词： Antarctic ice sheet snowmelt season delay sea ice solar irradiance

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：