检索结果-南通市图书馆

Molecular plant 2013年第3期6卷 945-958页

作者： Bing Xu Jin-Ying Gou Fu-Guang Li Xiao-Xia Shangguan Bo Zhao Chang-Qing Yang Ling-Jian Wang Sheng Yuan Chang-Jun Liu Xiao-Ya-Chen National Key Laboratory of plant Molecular Genetics and National plant Gene Research Center Institute of Plant Physiology and Ecology Shangha Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China Department of Biology Brookhaven National Laboratory Upton NY 11973 USA National Key Laboratory of Cotton Biology Institute of Cotton Research Chinese Academy of Agriculture Sciences Anyang 455000 China Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life Science Nanjing Normal University Nanjing 210046 China

plant growth requires cell wall extension. The cotton AtRD22-Like I gene GhRDL1, predominately expressed in elongating fiber cells, encodes a BURP domain-containing protein. Here, we show that GhRDL1 is localized in cell wall and interacts with GhEXPA1, an α-expansin functioning in wall loosening. Transgenic cotton overexpressing GhRDL1 showed an increase in fiber length and seed mass, and an enlargement of endopleura cells of ovules. Expression of either GhRDL1 or GhEXPA1 alone in Arabidopsis led to a substantial increase in seed size; interestingly, their co-expression resulted in the increased number of siliques, the nearly doubled seed mass, and the enhanced biomass production. Cotton plants overexpressing GhRDL1 and GhEXPA1 proteins produced strikingly more fruits （bolls）, leading to up to 40% higher fiber yield per plant without adverse effects on fiber quality and vegetative growth. We demonstrate that engineering cell wall protein partners has a great potential in promoting plant growth and crop yield.

关键词： BURP protein RD22-1ike α-expansin cell wall crop yield fruiting cotton fiber biomass.

Impacts of Defoliation on Morphological Characteristics and Non-Structural Carbohydrates of Populus talassica × Populus euphratica Seedlings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第7期93卷 1689-1703页

作者： Mengxu Su Zhanjiang Han Zhen Zhao Xiaofeng Wu Jiaju Wu College of Life Science and Technology Tarim UniversityXinjiang Production and Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim BasinAlar843300China Agricultural Science Research Institute of the first Division Xinjiang Production and Construction CorpsAlar843300China

Leaves are important‘source’organs that synthesize organic matter,providing carbon sources for plant ***,we used Populus talassica×Populus euphratica,the dominant species in ecological and timber forests,to simulate carbon limitation through artiﬁcial 25%,50%,and 75%defoliation treatments and explore the effects on root,stem,and leaf morphology,biomass accumulation,and carbon allocation *** the 60th d after treat-ment,under 25%defoliation treatment,the plant height,speciﬁc leaf weight,root surface area and volume,and concentrations of non-structural carbohydrates in stem and root were signiﬁcantly increased by 9.13%,20.00%,16.60%,31.95%,5.12%,and 9.34%,respectively,relative to the *** was no signiﬁcant change in the growth indicators under 50%defoliation treatment,but the concentrations of non-structural carbohydrates in the leaf and stem signiﬁcantly decreased,showing mostly a negative correlation between *** opposite was observed in the *** 75%defoliation treatment,the plant height,ground diameter,leaf number,single leaf area,root,stem,and total biomass were signiﬁcantly reduced by 14.15%,10.24%,14.86%,11.31%,11.56%,21.87%,and 16.82%,respectively,relative to the *** concentrations of non-structural carbohydrates in various organs were signiﬁcantly reduced,particularly in the consumption of the starch concentrations in the stem and *** results indicated that carbon allocation strategies can be adjusted to increase the con-centration of non-structural carbohydrates in root and meet plant growth needs under 25%and 50%***,75%defoliation signiﬁcantly limited the distribution of non-structural carbohydrates to roots and stems,reduced carbon storage,and thus inhibited plant ***-induced carbon limitation altered the carbon allocation pattern of ***×***,and the relationship between carbon reserves in roots and tree growth recovery after defoliation was *** study

关键词： Populus talassica×Populus euphratica defoliation carbon limitation carbon allocation non-structural carbohydrates

Structural geometrical analysis and simulation of decollement growth folds in piedmont Fauqi Anticline of Zagros Mountains, Iraq

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2016年第9期59卷 1885-1898页

作者： OU ChengHua CHEN Wei LI ChaoChun ZHOU WenJiang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University State-owned Asset Management Office Southwest Petroleum University Zhundong Oil production plant Xinjiang Oilfield Company

This study carried out detailed structural analyses of the plane structural deformation pattern and sectional structural deformation styles of the Fauqi Anticline by the 3D seismic section with full cover collection, and carried out the kinematical simulation of the Fauqi anticlinal deep decollement coupling shallow growth folds and faults based on the fault decollement fold model and the forward balanced geological section technique. The study subsequently evaluated the differentiated petroleum enrichment mechanism of the Fauqi Anticline by utilizing the results of the structural analysis and combining the spatial-temporal relationship analysis of the source, the reservoir, and the caprock. The results showed that the differentiated plane structural deformation pattern and hierarchical sectional structural deformation style were developed by the superposed coupling of deep decollement, syntectonic sedimentation of shallow growth strata, and the compression of the south-west horizontal tectonic stress from the Zagros Mountains. It was found that the differentiated structural deformation caused the differentiated enrichment of petroleum in the Fauqi Anticline. It was also found that the horizontal slip distance of the Fauqi Anticlinal Folds reached around 3.5 km by the simulation of deep decollement coupling the movement of the shallow growth folds and the faults.

关键词： Fauqi Anticline Decollement Growth fold Geometrical analysis of structures Kinematical simulation Petroleum enrichment Zagros Mountains

A multivariate partial least squares approach to joint association analysis for multiple correlated traits

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2016年第1期4卷 21-29页

作者： Yang Xu Wenming Hu Zefeng Yang Chenwu Xu Jiangsu Key Laboratory of Crop Genetics and Physiology Co-Innovation Center for Modern Production Technology of Grain CropsKey Laboratory of Plant Functional Genomics of the Ministry of Education Yangzhou University

Many complex traits are highly correlated rather than independent. By taking the correlation structure of multiple traits into account, joint association analyses can achieve both higher statistical power and more accurate estimation. To develop a statistical approach to joint association analysis that includes allele detection and genetic effect estimation, we combined multivariate partial least squares regression with variable selection strategies and selected the optimal model using the Bayesian Information Criterion(BIC). We then performed extensive simulations under varying heritabilities and sample sizes to compare the performance achieved using our method with those obtained by single-trait multilocus methods. Joint association analysis has measurable advantages over single-trait methods, as it exhibits superior gene detection power, especially for pleiotropic genes. Sample size, heritability,polymorphic information content(PIC), and magnitude of gene effects influence the statistical power, accuracy and precision of effect estimation by the joint association analysis.

关键词： Association analysis Multiple correlated traits Supersaturated model Multilocus Multivariate partial least squares

Some ecophysiological characteristics of artà (Calligonum comosum L'Hérit) in response to drought stress

在线全文

学校读者我要写书评

暂无评论

Forestry Studies in China 2013年第2期15卷 114-120页

作者： A. RANJBARFORDOEI P. VANDAMME R. SAMSON Department of Desert Sciences University of KashanKashan 1167 Iran Department of plant production Laboratory of Tropical and Subtropical Plants Ghent UniversityGent 9000 Belgium Department of Bioscience Engineering Research Group of Plant Production and Stress Tolerance University of AntwerpAntwerp 2020 Belgium

Water deficit is an important environmental factor restricting plant growth and photosynthesis. The effect of water deprivation on leaf water status, photosynthetic gas exchange, chlorophyll content and fluorescence parameters of arta （Calligonum comosum） was studied. Five-month-old arta seedlings, grown in pots in the open air, were subjected to one of four drought treatments （i.e., mild, moderate, severe and extreme drought stress） and compared to control seedlings （normal watering regime）. Results show that leaf water potential, net photosynthesis, stomatal conductance, transpiration, photosynthetic pigment content （chlorophyll a and b） decreased with increasing levels of drought stress. Inactivation of the photosynthetic apparatus was accompanied by changes in the fluorescence characteristics, providing evidence that reduction of photosynthetic rate could be attributed to non-stomatal limitations. Alterations imply changes in photochemical conversion efficiency of photosystem II by which plants could reduce water transpiration or protect their photosynthetic apparatus from destruction. These adaptations are discussed in relation to the strategies developed to grow drought-resistant arta seedlings in desert environments.

关键词： gas exchange water status variable fluorescence

Making small molecules in plants:A chassis for synthetic biology-based production of plant natural products

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2期65卷 417-443页

作者： Xinyu Liu Peijun Zhang Qiao Zhao Ancheng C.Huang Key Laboratory of Molecular Design for plant Cell Factory of Guangdong Higher Education Institutes Department of BiologySchool of Life SciencesSUSTech-PKU Institute of Plant and Food ScienceSouthern University of Science and TechnologyShenzhen 518055China Shenzhen Institutes of Advanced Technology(SIAT) the Chinese Academy of SciencesShenzhen 518055China

plant natural products have been extensively exploited in food,medicine,flavor,cosmetic,renewable fuel,and other industrial *** biology has recently emerged as a promising means for the cost-effective and sustainable production of natural *** with engineering microbes for the production of plant natural products,the potential of plants as chassis for producing these compounds is underestimated,largely due to challenges encountered in engineering *** in plant engineering is instrumental for enabling the effective and efficient production of valuable phytochemicals in plants,and also paves the way for a more sustainable future *** this manuscript,we briefly recap the biosynthesis of plant natural products,focusing primarily on industrially important terpenoids,alkaloids,and *** further summarize the plant hosts and strategies that have been used to engineer the production of natural *** challenges and opportunities of using plant synthetic biology to achieve rapid and scalable production of high-value plant natural products are also discussed.

关键词： biosynthesis natural products plant engineering synthetic biology

Effect of an Anionic Surfactant on Hydraulic Conductivities of Sodium- and Calcium-Saturated Soils

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2006年第5期16卷 673-680页

作者： RAO Pin-Hua HE Ming YANG Xian ZHANG You-Chi SUN Shou-Qin WANG Jiang-Sheng Department of Resource and Environmental Sciences Shanghai Jiaotong University Shanghai 201101 （China） Design Department of Binnan Oil production plant SINOPEC Shengli Oilfield Company Binzhou 256606 （China）

The effect of sodium dodecylbenzenesulfonate (SDBS), an anionic surfactant used widely in household products and industrial processes, on saturated hydraulic conductivities (Ksat) of an Anthrosol saturated with sodium (Na-soil) or calcium (Ca-soil) was analyzed in a laboratory experiment using the constant head method, and adsorption and dispersion experiments were also conducted to infer the possible mechanisms of Ksat fluctuations. The results showed that SDBS was more intensely adsorbed in the Ca-soil than in the Na-soil. With an increase in the SDBS concentration, the stability of the Na-soil suspensions decreased when the SDBS concentration was less than 1.2 mmol L-1 and then above this concentration, increased markedly, while the stability of the Ca-soil suspensions increased gradually at all SDBS concentrations studied. With an increase in the SDBS concentration, the Ksat of the Na-soil increased, which resulted mainly from the increase of water channels in the soil because of the coagulation of the soil particles, while the Ksat of Ca-soil decreased mainly on account of the clogging of partial water channels by precipitated Ca(DBS)2 and the fine soil particles generated.

关键词： adsorption anionic surfactant calcium-saturated soil hydraulic conductivity sodium-saturated soil

Characterization and Expression Analysis of Medicago truncatula ROP GTPase Family during the Early Stage of Symbiosis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative plant Biology 2010年第7期52卷 639-652页

作者： Wei Liu Ai-Min Chen Li Luo Jie Sun Lian-Pu Cao Guan-Qiao Yu Jia-Bi Zhu Yan-Zhang Wang National Key Laboratory of plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China The Key Oasis Eco-agriculture Laboratory of Xinjiang production and Construction Group Shihezi University Shihezi 832003 China

ROPs （Rho-related GTPases of plants） are small GTPases that are plant-specific signaling proteins. They act as molecular switches in a variety of developmental processes. In this study, seven cDNA clones coding for ROP GTPases have been isolated in Medicago truncatula, and conserved and divergent domains are identified in these predicted MtROP proteins. Phylogenetic analysis has indicated that MtROPs are distributed into groups II, III, IV but group I. MtROP genes are expressed in various tissues at different levels. A quantitative reverse transcription PCR analysis indicated that these MtROP genes have different expression profiles in the roots in response to infection with rhizobia. The expression of MtROP3, MtROP5 and MtROP6 are increased, as the expression of Nod factor or rhizobial-induced marker genes--NFP, Rip1 and Enod11; MtROPIO has showed enhanced expression at a certain post-inoculation time point. No significant changes in MtROP7 and MtROP9 expression have been detected and MtROP8 expression is dramatically decreased by about 80%-90%. Additionally, ROP promoter-GUS analysis has showed that MtROP3, MtROP5 and MtROP6 have elevated expression in transgenic root hairs after rhizobial inoculation. These results might suggest a role for some ROP GTPases in the regulation of early stages during rhizobial infection in symbiosis.

关键词： Proteins Protein products plants planting Roots Infection Inoculation Rooting Pathogenicity Genes

Resistance of stored bean varieties to Acanthoscelides obtectus （Coleoptera： Bruchidae）

在线全文

学校读者我要写书评

暂无评论

Insect Science 2008年第4期15卷 317-326页

作者： Edson L.L. Baldin Fernando M. Lara Department of plant production-Faculty of Agronomic Sciences/Sao Paulo State University Botucatu Sao Paulo State Department of plant Protection Faculty of Agranan and Veterinary Sciences / Sao Paulo State University Zip Code 14884-900 Jaboticabal Sao Paulo State Brazil

During bean seed storage, yield can be lost due to infestations of Acanthoscelides obtectus Say, the bean weevil. The use of resistant varieties has shown promising results in fighting these insects, reducing infestation levels and eliminating chemical residues from the beans. The expression of resistance to A. obtectus in bean varieties is frequently attributed to the presence of phytohemagglutinins, protease inhibitors and alpha-amylase, and especially to variants of the protein arcelin, which reduce the larval viability of these insects. To evaluate the effect of bean seed storage time on the resistance expression of bean varieties to A. obtectus, tests with seeds of three ages （freshly-harvested, 4-month-old, and 8-monthold） were conducted in the laboratory, using four commercial varieties： Carioca Pitoco, Ipa 6, Porrillo 70, Onix; four improved varieties containing arcelin protein： Arc. 1, Arc.2, Arc. 3, Arc.4; and three wild varieties also containing arcelin protein： ***, Arc.3S, and Arc. 5S. The Arc.5S, ***, and Arc.2 varieties expressed high antibiosis levels against the weevil; Arc.1 and Arc3S expressed the same mechanism, but at lower levels. The occurrence of oviposition non-preference was also observed in Arc.5S and Arc. 1S. The Arc.3 and Arc. 4 varieties expressed low feeding non-preference levels against A. obtectus. The expression of resistance in arcelin-bearing, wild or improved varieties was affected during the storage of seeds, and was high under some parameters but low in others. The results showed that addition of chemical resistance factors such as protein arcelin via genetic breeding may be beneficial in improving the performance of bean crops.

关键词： antibiosis antixenosis bean weevil host plant resistance Phaseolus vulgaris

Prediction Model of Wax Deposition Rate in Waxy Crude Oil Pipelines by Elman Neural Network Based on Improved Reptile Search Algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2024年第4期121卷 1007-1026页

作者： Zhuo Chen Ningning Wang Wenbo Jin Dui Li The Second Oil production plant Sinopec Northwest Oilfield CompanyUrumqi830011China Yingmaili Oil and Gas production Management Area PetroChina Tarim Oilfield CompanyKorla841001China College of Petroleum Engineering Xi’an Shiyou UniversityXi’an710065China

A hard problem that hinders the movement of waxy crude oil is wax deposition in oil *** ensure the safe operation of crude oil pipelines,an accurate model must be developed to predict the rate of wax deposition in crude oil *** at the shortcomings of the ENN prediction model,which easily falls into the local minimum value and weak generalization ability in the implementation process,an optimized ENN prediction model based on the IRSA is *** validity of the new model was confirmed by the accurate prediction of two sets of experimental data on wax deposition in crude oil *** two groups of crude oil wax deposition rate case prediction results showed that the average absolute percentage errors of IRSA-ENN prediction models is 0.5476% and 0.7831%,***,it shows a higher prediction accuracy compared to the ENN prediction *** fact,the new model established by using the IRSA to optimize ENN can optimize the initial weights and thresholds in the prediction process,which can overcome the shortcomings of the ENN prediction model,such as weak generalization ability and tendency to fall into the local minimum value,so that it has the advantages of strong implementation and high prediction accuracy.

关键词： Waxy crude oil wax deposition rate chaotic map improved reptile search algorithm Elman neural network prediction accuracy