检索结果-南通市图书馆

Chinese Science Bulletin 2004年第10期49卷 1026-1031页

作者： WUFeijian CHENQicai JENPhilipH.S. SHENJunxian SchoolofLifeSciences.CentralChinaNormalUniversity.Wuhan430079.China divisionofbiologicalsciences UniversityofMissouri-Columbia.MO65211.USA LaboratoryofVisualInformationProcessing InstituteofBiophysicsChineseAcademyofSciencesBeijing100101China

By means of a particular two-tone stimulationparadigm in combination of using a pair of electrodes forsimultaneously recording from two inferior colliculus (IC)neurons, the current in vivo study is undertaken to explorethe role of frequency band integration (FBI) in sharpening offrequency tuning in the big brown bat, Eptesicus *** major results are found: (1) The paired neurons cor-related to FBI are located not only within the same frequencyfilter bandwidth (FFB), but also across different FFBs. Therelations of their frequency tuning curves (FTCs) are mainlyof two types: the flank-overlapped and overlaid patterns. (2)Although the sharpness of FTCs between paired neurons ismutual, the sharpening efficiency of neurons located withinthe same FFB is higher than that of neurons across FFBs,and the FTCs of neurons with the best frequencies (BF) of 20--30 kHz are most strongly sharpened. (3) The strength ofFBI is weak near the BF but gradually increased with fre-quencies away from the BF of sound stimuli. This suggeststhat the dynamical FBI of the IC neurons located within and across the FFBs might be involved in the formation of func-tional FFB structures.

关键词：频带综合频率调节下丘神经蝙蝠平滑

Isolation of a Mutant of Ferl Gene, Acting Synergistically with the ARF8 Gene to Control Development of the Anther and Filament in Arabidopsis

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 Integrative Plant Biology 2005年第3期47卷 327-333页

作者： Chang-EnTIAN Shun-ZhiLIU KotaroYAMAMOTO DepartmentofBioengineering SchoolofBiologicalandChemicalEngineeringGuangzhouUniversityGuangzhou510405China／／DivisionofB DepartmentofBioengineering SchoolofBiologicalandChemicalEngineeringGuangzhouUniversityGuangzhou510405China divisionofbiologicalsciences GraduateSchoolofScienceHokkaidoUniversitySapporo010-0810Japan

Auxin response factors (ARFs) play a central role in plants as transcriptional factors in response to auxin. The Arabidopsis ARF8 gene is a light-inducible gene and ARF8 protein might control auxin homeostasis in a negative feed-back fashion through regulation of GH3 gene expression. In a double mutant designated infertile line including arf8-1 (a T-DNA insertion mutant of ARF8), we isolated fertility1-1 (fer1-1), a mutant of Fer1, which acts synergistically with ARF8 to control the development of the anther and filament in Arabidopsis. Genetics analysis has demonstrated that fer 1-1 is a T-DNA insertion line, indicating that Fer1 might be cloned by inverse polymerase chain reaction (PCR) or the TAIL-PCR approach. Phenotypic identification and molecular analysis of fer 1-1 and the infertile line will be helpful to characterize the function of Fer1, to further study the function of ARF8, and to reveal the molecular mechanism underlying the interaction of Fer1 and ARF8 in controlling development of the anther and filament.

关键词： anther Arabidopsis arf8-1 fer1-1 filament

Effects of forward masking on the responses of the inferior collicular neurons in the big brown bats, Eptesicus fuscus

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 Science Bulletin 2003年第16期48卷 1748-1752页

作者： LUANRuihong WUFeijian P.H.S.Jen SUNXinde CollegeofLifeSciences EastChinaNormalUniversityShanghai200062China CollegeofLifeSciences CentralChinaNormalUniversityWuhan430079China divisionofbiologicalsciences UMCMO65211USA

The present study explores the forward mask-ing of the two-tone stimuli in sequence that evoked responses in the inferior colliculus (IC) of the echolocating bats. The results indicate that forward masking is obvious in the acoustic responses of the IC neurons to the two-tone stimuli. Meanwhile the intensity sensitivity of the neurons respond-ing to the probe increases with the inter-tone interval de-creasing. The effects of forward masking are correlated with the relative intensity and the interval between the masker and probe. That is, the effects of forward masking are re-duced with the masker intensity decreasing and enhanced with the probe intensity decreasing and the inter-tone inter-val shortened. The present study suggests that there is a cor-relation between the characteristics of the response to the probe and the dynamic conditions of the postsynaptic cur-rents in the IC neurons.

关键词：神经元回音声音间隔声音探测器前掩蔽 IC 回声定位生理学多突触传递

The Quadraplex Tetraploids Hybrids and Duplex Tetraploids Hybrids Are Responsible for Heterosis and Inbreeding Depression in Maize

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

Agricultural Sciences in China 2005年第7期4卷 486-493页

作者： WANGZe-li JamesABirchler WANGLu-xin JINLiang CollegeofLifeSciences ShandongAgriculturalUniversityTai＇an271018P.R.China divisionofbiologicalsciences UniversityofColumbiaU.S.A. CollegeofLifeSciences ShandongAgriculturalUniversityTai＇an271018P.R.China

The maize quadraplex tetraploids and duplex tetraploids were developed using Kato’s protocols. The phenotype ofheterosis and inbreeding depression over generations in their parents and progenies of F1, F2 and F3 were *** results indicated that different duplex tetraploids have different genetic backgrounds, but they acquire maximumheterosis at same traits, such as the leaf length, leaf width, culm circumference and days to flowering. P.N. rises muchfaster from the F2 to F3 segment than the A.W. does for the plant height in duplex tetraploids. In comparing duplex andquadraplex over a generation the quadriplex is showing the greatest heterosis in plant height, leaf height, leaf width anddays to flowering. Most of the examples achieve the maximum heterosis at Qu F2, with the exception of culm circumference,which achieves greatest heterosis at PNAW F1. Meanwhile, this experiment shows that quadraplex tetraploids has distinctadditional favorable alleles that are not contained in duplex tetraploid, this is demonstrated by the heterosis found incrosses between the two duplex tetraploid. This finding helps explain quadraploids superiority and unique breedingbehavior, in which, the progressive heterosis and inbreeding depression in maize are due mainly to linkage *** severe inbreeding depression in duplex tetraploids is due mainly to the rapid loss of complementary chromosomes orgenes interactions in the first few generation of inbreeding. Correspondingly, the progressive heterosis in quadraplextetraploids is due mainly to a progressive increase in complementarities of homologous chromosomes or genes *** complementarities of homologous chromosomes or genes interactions in tetraploids maize alse helps explainrecent molecular biology research indicating that some of traits in quadraplex tetraploids are more responsive to geneticdiversity than in duplex tetraploids. In addition, the dosage effect of polyploid in relation to the genet

关键词： Maize Quadraplex tetraploids Duplex tetraploids Heterosis Inbreeding depression Dosage effect

Guard Cell Signaling Dynamics and Rapid Chip-based Cloning of Ion Accumulation Mutants

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

Acta Genetica Sinica 2004年第9期31卷 1001-1002页

作者： JulianI.Schroeder JimingGong DavidWaner TomoakiHorie JuneM.Kwak IzumiMori NathalieLeonhardt GethynAllen Zhen-MingPei ErwinGrill YoshiyukiMurata JaredYoung CellandDevelopmentalBiologySection DivisionofBiologicalSciencesUniversityofCaliforniaSanDiegoLaJollaCA920930116USA DepartmentofBiology UniversityofMarylandCollegeParkMD20742USA DepartmentofBiology DukeUniversityDurhamNC27708USA TechnicalUniversity Arcisstr.2180290MunichWeihenstephanGermany

Guard cells have been developed as a model system for dissecting hormone,ion channel and calcium signal transduction in response to physiological stimuli. Abscisic acid causes elevations in the cytosolic Ca^2+ concent... 详细信息

关键词：保卫细胞突变体染色体组信号动力学克隆植物

SYNTHESIS OF NEW GALACTOSYLATED CHITOSAN DERIVATIVES

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 Journal of Reactive Polymers 2000年第F5期9卷 141-141页

作者： PiotrKulpinski Shin－IchiroNishimura divisionofbiologicalsciences GraduateSchoolofScienceHokkaidoUniversitySapporo060－0810JAPAN

ENZYMATIC SYNTHESIS OF BIOACTIVE GLYCOCONJUGATES USING HIGH PERFORMANCE POLYMER SUPPORTS

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 Journal of Reactive Polymers 2000年第F5期9卷 27-27页

作者： Shin－IchiroNishimura divisionofbiologicalsciences GraduateSchoolofScienceHokkaidoUniversitySapporo060－0810JAPAN

PREPARATION AND APPLICATIONS OF IMMOBILIZED GLYCOSYLTRANSFERASES IN GLYCOPEPTIDE SYNTHESIS

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 Journal of Reactive Polymers 2000年第F5期9卷 143-143页

作者： KurikoYamada TakashiNishimura 等 LaloratoryofBioorganicChemistry＆Glycolusters DivisionofBiologicalSciencesGraduateSchoolofScienceHokkaidoUniversitySapporo060－0810JAPAN；NEDO（NewEnergyandIndustrialTechnologyD LaloratoryofBioorgan