检索结果-南通市图书馆

Genomes of Meniocus linifolius and Tetracme quadricornis reveal the ancestral karyotype and genomic features of core Brassicaceae

引用

Plant Communications 2024年第7期5卷 68-89页

作者： Jie Liu Shi-Zhao Zhou Yun-Long Liu Bin-yan Zhao Dongmei Yu Mi-Cai Zhong Xiao-Dong Jiang Wei-Hua Cui Jiu-Xia Zhao Juan Qiu Liang-Min Liu Zhen-Hua Guo Hong-Tao Li dun-yan tan Jin-Yong Hu De-Zhu Li CAS Key Laboratory for Plant Diversity and Biogeography of East Asia&Yunnan Key Laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Germplasm Bank of Wild Species&Yunnan Key Laboratory for Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Xinjiang Agricultural UniversityÜrümqi 830052China University of Chinese Academy of Sciences Beijing 100049China These authors contributed equally to this article

Brassicaceae represents an important plant family from both a scientific and economic ***,genomic features related to the early diversification of this family have not been fully characterized,especially upon the uplift of the Tibetan Plateau,which was followed by increasing aridity in the Asian interior,intensifying monsoons in Eastern Asia,and significantly fluctuating daily ***,we reveal the genomic architecture that accompanied early Brassicaceae diversification by analyzing two high-quality chromosome-level genomes for Meniocus linifolius(Arabodae;clade D)and Tetracme quadricornis(Hesperodae;clade E),together with genomes representing all major Brassicaceae clades and the basal *** reconstructed an ancestral core Brassicaceae karyotype(CBK)containing 9 pseudochromosomes with 65 conserved syntenic genomic blocks and identified 9702 conserved genes in *** detected pervasive conflicting phylogenomic signals accompanied by widespread ancient hybridization events,which correlate well with the early divergence of core *** identified a successive Brassicaceae-specific expansion of the class I TREHALOSE-6-PHOSPHATE SYNTHASE 1(TPS1)gene family,which encodes enzymes with essential regulatory roles in flowering time and embryo *** TPS1s were mainly randomly amplified,followed by expression *** results provide fresh insights into historical genomic features coupled with Brassicaceae evolution and offer a potential model for broad-scale studies of adaptive radiation under an ever-changing environment.

关键词： Cruciferae genomic features ancient hybridization core Brassicaceae karyotype CBK TREHALOSE-6-PHOSPHATE SYNTHASE 1 genes TPS1s

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

An Examination of the Function of Male Flowers in an Andromonoecious Shrub Capparis spinosa

引用

Journal of Integrative Plant Biology 2009年第3期51卷 316-324页

作者： Tao Zhang dun-yan tan Xinjiang Key Laboratory of Grassland Resources and Ecology College of Grassland and Environment Sciences Xinjiang Agricultural University Orümqi 830052 China Xinjiang Institute of Materia Medica Orümqi 830002 China

The pollen donor and pollinator attractor hypotheses are explanations for the functions of the male flowers of andromonoecious plants. We tested these two hypotheses in the andromonoecious shrub Capparis spinosa L. （Capparaceae） and confirmed that pollen production and cumulative volume and sugar concentration of nectar do not differ between male and perfect flowers. However, male flowers produced larger anthers, larger pollen grains and smaller ovaries than perfect flowers. Observations on pollinators indicated that two major pollinators （Xylocopa valga Gerst and Proxylocopa sinensis Wu） did not discriminate between flower morphs and that they transferred pollen grains a similar distance. However, there were more seeds per fruit following hand pollination with pollen from male flowers than from perfect flowers. Individuals of C. spinosa with a larger floral display （i.e. bearing more flowers） received more pollen grains on the stigma of perfect flowers. Female reproductive success probably is not limited by pollen. These results indicate that male flowers of C. spinosa save resources for female function and that they primarily serve to attract pollinators as pollen donors.

关键词： andromonoecy Capparis spinosa pollen donor pollinator attractors reproductive success.

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

刺山柑雄全同株性系统的适应意义

引用

植物分类学报 2008年第6期46卷 861-873页

作者：张涛谭敦炎新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室乌鲁木齐830052

对分布于新疆北部干旱荒漠区的刺山柑Capparis spinosa性系统进行了研究。结果表明:(1)该物种具有典型的雄全同株性系统。雄花和两性花的雄蕊均正常发育,且有长短之分;两性花的雌蕊发育正常,而雄花的雌蕊败育,只行使雄性功能。(2)居群... 详细信息

对分布于新疆北部干旱荒漠区的刺山柑Capparis spinosa性系统进行了研究。结果表明:(1)该物种具有典型的雄全同株性系统。雄花和两性花的雄蕊均正常发育,且有长短之分;两性花的雌蕊发育正常,而雄花的雌蕊败育,只行使雄性功能。(2)居群间每天开放的雄花和两性花比率、两性花的长短雄蕊数及雄花短雄蕊的花丝与花药长等存在极显著差异(P0.05)。(3)单花花期为15-16h,每天18:00时左右开始开放,有强烈的气味和花蜜产生。植株每天产生的雄花和两性花数是随机的,可形成短时的雄花与两性花异株,但居群内雄花数比两性花数多。(4)三个居群两性花的P/O值分别为1.57×104、1.65×104和1.71×104。居群内雄花和两性花的花粉数及长、短雄蕊花药的花粉数均无显著差异(P>0.05),居群间雄花和两性花的花粉数、两性花的胚珠数及P/O值差异也不显著(P>0.05)。(5)各居群雄花和两性花长短雄蕊的花粉活力动态变化曲线相似,花粉寿命为18-20h,两性花雌蕊柱头的可授期为16-18h。(6)访花昆虫为膜翅目Hymenoptera和鳞翅目Lepidoptera昆虫,3个居群共有7种访花昆虫,其活动受天气影响很大。(7)两性花不存在无融合生殖现象,授自花花粉、同株异花花粉和异株异花花粉后均可结实,属于混合交配系统。刺山柑的雄全同株性系统可能是在长期与荒漠环境相适应的过程中由遗传和环境共同作用的结果。雄花的出现不仅增加了花粉数和P/O值,提高了植株的雄性适合度,同时增加了花的数量、对传粉昆虫的吸引力以及两性花柱头接受异花花粉的机会,提高了异交率和雌性适合度,保障其在荒漠极端环境中繁殖成功。

关键词：适应雄全同株刺山柑荒漠环境混合交配系统繁殖成功

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

Eutectic-derived synthesis of hierarchically nanoporous copper for electrochemical actuation and solar steam generation

引用

Nano Research 2024年第3期17卷 2011-2018页

作者： Qingguo Bai yan Wang Fuquan tan Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China School of Applied Physics and Materials Wuyi UniversityDongcheng Village 22Jiangmen 529020China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022China

The utilization of nanoporous copper(np-Cu)as a metallic actuator has gained attention in recent years due to its cost-effectiveness in comparison to other precious *** this,the enhancement of np-Cu’s actuation performance remains a challenge due to limitations in its strain amplitude and actuation ***,np-Cu has been deemed as a promising material for solar absorption due to its localized surface plasmon resonance ***,practical applications such as solar steam generators(SSGs)utilizing np-Cu have yet to be *** this study,we present the development of hierarchically nanoporous copper(HNC)through the dealloying of a eutectic Al-Cu *** hierarchical structure of the HNC features a combination of ordered flat channels and randomly distributed continuous nanopores,which work in synergy to improve actuation *** ordered flat channels,with a sub-micron scale,facilitate rapid mass transport of electrolyte ions,while the nano-sized continuous pores,due to their large specific surface area,enhance the induced *** results indicate that the HNC exhibits improved actuation performance,with a two times increase in both strain amplitude and rate in comparison to other reported ***,the HNC,for the first time,showcases excellent solar steam generation capabilities,with an evaporation rate of 1.47 kg·m^(-2)·h^(-1) and a photothermal conversion efficiency of 92%under a light intensity of 1 kW·m^(-2),which rivals that of nanoporous gold and silver *** enhanced actuation performance and newly discovered solar steam generation properties of the HNC are attributed to its hierarchically porous structure.

关键词： eutectic alloy dealloying hierarchically nanoporous copper(HNC) actuation solar steam generation

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

Why be gynomonoecious? Pistillate flowers experiencing pollen limitation have fewer ovules and reduce geitonogamy compared to perfect flowers

Why be gynomonoecious? Pistillate flowers experiencing polle...

引用

生态文明建设中的植物学：现在与未来——中国植物学会第十五届会员代表大会暨八十周年学术年会

作者： Jannathan Mamut Ying-Ze Xiong dun-yan tan Shuang-Quan Huang Xinjiang Key Laboratory of Grassland Resources and Ecology College of Grassland and Environment Sciences Xinjiang Agricultural University State Key Laboratory of Hybrid Rice College of Life Sciences Wuhan University

Gynomonoecy, a sexual system in which plants have both pistillate (female) flowers and perfect (hermaphroditic) flowers, occurs at least in 23 families, but differential adaptation of the two flower morphs within one individual remains unclear. Erect racemes of Eremurus anisopterus (Xanthorrhoeaceae) have basal pistillate and distal perfect flowers. To compare sex allocation and reproductive success between the two flower morphs, we measured floral traits, pollinator preferences, and pollen movement in the field. Pollen limitation was more severe in pistillate flowers;bee pollinators preferred to visit perfect flowers which were also capable of partial self pollination. Pollen-staining experiments indicated perfect flowers receiving a higher

关键词：

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

新牧I号杂花苜蓿异交机制与自花粉的生殖干扰

引用

植物分类学报 2008年第6期46卷 856-860页

作者：张爱勤谭敦炎朱进忠新疆大学生命科学与技术学院乌鲁木齐830046 新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室乌鲁木齐830052

通过控制试验和荧光观测等手段对新牧I号杂花苜蓿Medicago varia Martyn‘XinmuNo.1'柱头可授期与最佳授粉时间、自花粉的堵塞效应、花粉萌发与花粉管生长状况等进行研究,结果显示:(1)苜蓿柱头可授期与单花寿命具高度的同步性,在单花开... 详细信息

通过控制试验和荧光观测等手段对新牧I号杂花苜蓿Medicago varia Martyn‘XinmuNo.1'柱头可授期与最佳授粉时间、自花粉的堵塞效应、花粉萌发与花粉管生长状况等进行研究,结果显示:(1)苜蓿柱头可授期与单花寿命具高度的同步性,在单花开放的第1天授粉,传粉效率最高,结荚率达65.17%±2.01%(P<0.01),为柱头的最佳授粉时期;在单花开放后第4天授粉,其结荚率仍达34.25%±6.73%。(2)自花授粉比异花授粉有着较低的花粉萌发率和花粉管生长速度;清除柱头自花粉后再授异花粉,其结荚率/花序和荚内种子粒数由原来的51.76%±5.37%和2.11±0.18粒,提高到72.31%±6.24%(P<0.01)和3.46±0.25粒(P<0.01),自花粉对柱头的堵塞效应非常明显。(3)在繁育系统中,苜蓿采取了雌雄异熟和自交不亲和两套机制来避免自交,但是由于其独特的花结构,即使雄蕊先熟,在保证苜蓿异交机制中也没有起到有效的作用,而其典型的自交不亲和系统,虽然保证了苜蓿较低的自交率,却无法避免自花粉的生殖干扰。

关键词：苜蓿异交机制生殖干扰堵塞效应

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

Four centrosome-related genes to predict the prognosis and drug sensitivity of patients with colon cancer

引用

World Journal of Gastrointestinal Oncology 2024年第5期16卷 1908-1924页

作者： Hui-yan Wang yan Diao Pei-Zhu tan Huan Liang Department of Clinical Laboratory Harbin Medical University Cancer HospitalHarbin 150086Heilongjiang ProvinceChina Department of Clinical Laboratory Heilongjiang Province HospitalHarbin 150000Heilongjiang ProvinceChina Translational Medicine Center of Northern China Harbin Medical UniversityHarbin 150081Heilongjiang ProvinceChina

BACKGROUND As the primary microtubule organizing center in animal cells,centrosome abnormalities are involved in human colon *** To explore the role of centrosome-related genes(CRGs)in colon *** CRGs were collected from public *** clustering analysis was performed to separate the Cancer Genome Atlas *** Cox and least absolute shrinkage selection operator regression analyses were performed to identify candidate prognostic CRGs and construct a centrosome-related signature(CRS)to score colon cancer patients.A nomogram was developed to evaluate the CRS risk in colon cancer *** integrated bioinformatics analysis was conducted to explore the correlation between the CRS and tumor immune microenvironment and response to immunotherapy,chemotherapy,and targeted ***-cell transcriptome analysis was conducted to examine the immune cell landscape of core prognostic *** A total of 726 CRGs were collected from public databases.A CRS was constructed,which consisted of the following four genes:TSC1,AXIN2,COPS7A,and *** cancer patients with a high-risk signature had poor *** with a high-risk signature exhibited decreased levels of plasma cells and activated memory CD4+T *** treatment response,patients with a high-risk signature were resistant to immunotherapy,chemotherapy,and targeted ***7A expression was relatively high in endothelial cells and ***1 expression was high in endothelial cells,fibroblasts,and malignant *** We constructed a centrosome-related prognostic signature that can accurately predict the prognosis of colon cancer patients,contributing to the development of individualized treatment for colon cancer.

关键词： Colon cancer Centrosome Signature Prognostic Immune microenvironment Therapy

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

Metallogenesis of the Baidi Au-Sb deposit, southwest Guizhou Province, China: mineralogical and geochemical evidence from sulfur-bearing minerals

引用

Acta Geochimica 2024年第2期43卷 199-213页

作者： Jun yan Yong Xia Qinping tan Zhuojun Xie Guosong Ji State KeyLaboratory of Ore Deposit Geochemistry Institute of GeochemistryChineseAcademy of SciencesGuiyang 550081China Guizhou InstituteofTechnology Guiyang550003China No.102 GeologicalTeam Guizhou Bureau of Geologyand Mineral Exploration&DevelopmentZunyi563003China

The Baidi Au-Sb deposit, which contains 8 t of Au and 10,979 Mt of Sb, is a typical and rare paragenetic deposit located in southwestern Guizhou Province, *** studies have focused on individual ores, but have not combined them to identify their paragenetic mechanism or metallogenic regularity. Therefore, we used field investigations, microscopic observations, and in situ analyses to identify the spatial distribution, mineral paragenesis, compositional evolution, and metallogenic material sources of the ore bodies. We also determined the Au and Sb paragenetic characteristics and the metallogenesis of the deposit. The main Au-bearing minerals in the deposit were early(Apy1–2) and late(Apy3) stage arsenopyrites, as well as pre-mineralization(Py1), mineralization(Py2–5), and late mineralization(Py6–7) stage pyrites. The main Sb-bearing minerals were stibnite(Snt), skinnerite, bournonite,and valentinite. The minerals formed in the order of Py1,Py2–3 + Apy1, Py4–5 + Apy2, Snt, and Py6–7 + *** δ34S values of the arsenopyrites and pyrites ranged from-5 to 5‰, while those of stibnite were mostly less than-5‰ in the later mineralization stages. Sulfur was provided by deep magmatic hydrothermal fluids, but sedimentary sulfur was added in the later stages. Moreover,the trace elemental contents fluctuated and eventually became similar to those of the sedimentary strata. By comprehensively considering the ores along with the geological characteristics of the deposit, we determined that deep magma provided the Au during ore formation. Later tectonic changes provided Sb from the sedimentary strata,which precipitated along fault expansion areas and produced Au and Sb paragenesis.

关键词： Au-Sb mineralization Arsenopyrite Pyrite Stibnite Metallogenetic process

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

Bioinspired sensing-memory-computing integrated vision systems: biomimetic mechanisms, design principles, and applications

引用

Science China(Information Sciences) 2024年第5期67卷 5-27页

作者： Yujie HUANG Yinlong tan yan KANG Yabo CHEN Yuhua tanG Tian JIANG Institute for Quantum Information and State Key Laboratory of High Performance Computing College of Computer National University of Defense Technology College of Advanced Interdisciplinary Studies National University of Defense Technology Institute for Quantum Science and Technology College of ScienceNational University of Defense Technology

With the explosion of sensory data in the Internet of Things(Io T) era, conventional machine vision systems are becoming increasingly difficult to meet the requirements of high efficiency, low energy consumption, and low latency due to their inherent shortcomings of separate sensing, memory, and computing units. Inspired by the retina and neuromorphic computing, the sensing-memory-computing integrated vision system(SMCVS) that features low power consumption, low latency, and high parallelism has been considered a promising technology to surpass the von Neumann architecture and realize strong artificial ***, novel materials like two-dimensional semiconductors and quantum dots with novel optoelectronic performance provide hardware carriers for implementing integrated sensing-memory-computing architectures,attracting considerable attention. This paper reviews the recent research progress in bioinspired vision systems in terms of biomimetic mechanisms, design principles, computational architectures, and ***, the biomimetic mechanisms are illustrated to guide the design of high-performance artificial visual perception systems. Then the research progress of optoelectronic-synapse-based bioinspired vision systems in the device principles and applications including image filtering, color recognition, visual adaptation, and motion detection are summarized. Finally, the challenges and future developing directions of the SMCVS are provided regarding bionic application, architecture design, and device fabrication.

关键词： sensing-memory-computing architecture neuromorphic computing retinomorphic device image recognition visual system

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

Conceptual design and configurations selection of S/H-UAVs based on Q-rung dual hesitant double layer FQFD

引用

Chinese Journal of Aeronautics 2024年第9期37卷 193-205页

作者： dun yanG Li LIU Wencan BAI Weiyong TIAN School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

For the conceptual design phase of Unmanned Aerial Vehicles(UAVs),a process for conceptual design and configuration selection of Solar/Hydrogen powered UAVs(S/H-UAVs)is *** design requirements of S/H-UAVs were analyzed *** proposed process used Fuzzy Quality Function Deployment(FQFD)to establish logical and quantitative ***,in order to appropriately describe the hesitancy of experts while making decision,it used Q-Rung Dual Hesitant Fuzzy Sets(QRDHFS)to score the *** addition,a decision-making framework is proposed to perform a logical selection of typical layouts based on defuzzi-fication method and Technique for Order Preference by Similarity to the Ideal Solution(TOPSIS).The present process has been applied for S/*** resulting set of design requirements con-sists of three categories:Mission Requirements(MRs),Engineering Characteristics(ECs)and Tech-nical Indicators(TIs).Four typical layouts of S/H-UAVs were sorted and *** performance of four typical layouts were evaluated and the Strut-Braced Wing(SBW)with external hydrogen storage was selected as the best layout for S/H-UAVs.

关键词： Hybrid powered UAV Conceptual design Q-Rung Dual Hesitant Fuzzy Set(QRDHFS) Quality function deployment Strut-braced wing

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

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：