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The Physiological and Molecular Responses of Exogenous Selenium to Selenium Content and Fruit Quality in Walnut

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Phyton-International Journal of Experimental Botany 2023年第3期92卷 851-860页

作者： Mufang Sun Xinran Hui Cuiling Tong longyi yuan Dejian Zhang Xinyang Agriculture and Forestry University Xinyang464000China Tibet Plateau Walnut Industry Research Institute Yangtze UniversityCollege of Horticulture and GardeningJingzhou434025China Jingzhou Institute of Technology Jingzhou434025China

To study the effect of exogenous selenium on fruit quality in walnut(Juglans regia L.),8-year-old walnut(Qingxiang)was taken as the research *** the fruit expansion stage,300 mg/L of sodium selenate,yeast selenium and sodium selenite solutions were applied on the leaf of walnut,and the selenium levels in leaves,pericarp and kernel were determined at the ripening *** fruit quality,mineral nutrient content,antioxidant enzyme activity,and related genes’expression were *** results showed that the three exogenous selenium increased the selenium levels in leaves,pericarp and kernel of *** also significantly increased fruit and kernel weights,and kernel linoleic acid,but markedly decreased kernel crude fat and saturated fatty *** spraying promoted the absorption of mineral nutrients such as potassium and zinc,but inhibited the absorption of calcium,and had no significant effect on iron and magnesium in the *** exogenous selenium increased the activities of superoxide dismutase(SOD),peroxidase(POD),ascorbate peroxidase(APX),and catalase(CAT)significantly in the *** for sodium selenate treatment significantly reduced malondialdehyde(MDA)content in the kernel,the other two selenium sources treatments had no significant effect on MDA and hydrogen peroxide(H2O2)*** also increased the expression of JrCu/Zn-SOD,Jr2-Cys POD,JrCyt-APX and JrCAT in kernel,to different *** implies that,in the walnut fruit enlargement period,the foliar spraying selenium could increase the selenium content of walnut,affect the mineral nutrient absorption,improve the antioxidant capacity and related genes’expression,and reduce the degree of peroxide,and then improve the quality of ***,yeast selenium showed the comprehensive effect of the best.

关键词： Antioxidant system fruit quality mineral nutrient selenium walnut

植物非特异性脂质转运蛋白(nsLTPs)功能

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分子植物育种 2024年第5期22卷 1471-1479页

作者：杨鑫何秀娟仝铸肖翠王泽琼肖玉雄袁龙义孙中海邱文明长江大学园艺园林学院荆州434025 湖北省农业科学院果树茶叶研究所果树种质创新与利用湖北省重点实验室武汉430064

植物非特异性脂质转运蛋白(plant non-specific lipid transfer proteins,nsLTPs)是一类小分子可溶性碱性蛋白,包含1个由4个二硫键链接的8个半胱氨酸残基保守基序、1个内部疏水空腔和1个脂质结合位点。这种结构使得ns TLPs稳定性高,结... 详细信息

植物非特异性脂质转运蛋白(plant non-specific lipid transfer proteins,nsLTPs)是一类小分子可溶性碱性蛋白,包含1个由4个二硫键链接的8个半胱氨酸残基保守基序、1个内部疏水空腔和1个脂质结合位点。这种结构使得ns TLPs稳定性高,结合或转运疏水分子的能力增强,因此能够在膜间转移脂质。植物ns LTPs广泛存在于高等植物中,主要有5种类型,包括LTP1、LTP2、LTPc、LTPd和LTPg,其中LTP1和LTP2最常见,研究数量相对较多。植物nsLTPs的生物学功能丰富,除了参与植物生长和发育(角质层蜡质合成,胚胎发育,种子发育和萌发)外,在非生物胁迫以及病原菌防御中也起重要作用。本研究主要讲述了近几年植物nsLTPs功能研究进展,分析了该研究存在的不足之处,并展望了未来研究方向,旨在为深入了解植物nsLTPs的功能提供参考。

关键词：非特异性脂质转运蛋白生物学功能亚细胞定位非生物胁迫

Current Research and Prospect of <i>Dendrobenthamia hongkongensis</i>in China

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Natural Resources 2013年第6期4卷 435-440页

作者： longyi yuan Peng Lang Xinghua Xue College of Horticulture and Garden Yangtze University Jingzhou China

Dendrobenthamia hongkongensis is an excellent ornamental tree species, which has a wide range in germplasm resources distribution and rich varieties within species in China and has also a great development prospect of the new superior species for city landscape. So it is necessary for us to do much research for the development and utilization of this species. According to the latest existing research data of D. hongkongensis, the research achievements of D. hongkongensis in Germplasm resource distribution, bio-ecological habits, breeding and cultivation techniques and so on have been analyzed and summed up. On the other hand, its Ornamental value has been utilized in the modern landscape. At the same time, Edible and Medicinal value of D. hongkongensis has been discussed in the paper as well as Material value of D. hongkongensis. In addition, the future aspects of physiological and ecological research, domestication and breeding new varieties, resource protection and landscape application of D. hongkongensis have been proposed.

关键词： Dendrobenthamia hongkongensis Germplasm Resource Distribution Ornamental Value Breeding Color-Leaf Tree Species

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洪湖5种优势沉水植物光合荧光特性比较研究

西北植物学报 2015年第2期35卷 344-349页

作者：经博翰袁龙义长江大学园艺园林学院湖北荆州434025 长江大学湿地生态与农业利用教育部工程研究中心湖北荆州434025

利用水下饱和脉冲荧光仪(DIVING-PAM),原位观测洪湖5种优势沉水植物——苦草[Vallisneria natans(Lour.)Hara]、黑藻[Hydrilla verticillata(L.f.)Royle]、狐尾藻(Myriophyllum verticillatum L.)、菹草(Potamogeton crispus L.)和马来眼子菜(Potamogeton wrightii Morong)的量子产量及快速光曲线。结果显示:5种沉水植物苦草、黑藻、狐尾藻、菹草和马来眼子菜最大量子产量(Fv/Fm)分别为0.603、0.723、0.751、0.778和0.646。各物种的开放PSⅡ反应中心原初光能捕获效率(Fv′/Fm′)的大小依次为菹草>狐尾藻>黑藻>马来眼子菜>苦草,且除黑藻与狐尾藻间差异不显著外,其他物种间差异均显著;各物种光能利用能力(α)的大小依次为菹草>黑藻>狐尾藻>马来眼子菜>苦草,且除黑藻与狐尾藻间差异不显著外,其他物种间差异均显著;各物种无光抑制的最大潜在相对电子传递速率(rETRm)的大小依次为菹草>狐尾藻>黑藻>马来眼子菜>苦草,且各物种间差异显著;半饱和光强(Ek)的大小依次为狐尾藻>菹草>黑藻>苦草>马来眼子菜,且除狐尾藻与菹草间差异不显著外,其他物种间差异均显著。研究表明:洪湖5种优势沉水植物中,菹草和狐尾藻较耐强光,光合速率较高,而苦草则有较强的耐弱光能力。

关键词：洪湖沉水植物量子产量快速光曲线

Robustness of the octupole collectivity in 144Ba within the cranking covariant density functional theory in 3D lattice

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Nuclear Science and Techniques 2024年第8期35卷 124-131页

作者： Ze‑Kai Li yuan‑yuan Wang Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China

The octupole deformation and collectivity in octupole double-magic nucleus 144Ba are investigated using the Cranking covariant density functional theory in a three-dimensional lattice *** reduced B(E3)transition probability is implemented for the first time in semiclassical approximation based on the microscopically calculated electric octupole *** available data,including the I-ωrelation and electric transitional probabilities B(E2)and B(E3)are well ***,it is shown that the ground state of 144Ba exhibits axial octupole and quadrupole deformations that persist up to high spins(I≈24h).

关键词： Octupole collectivity Cranking covariant density functional theory Rotational spectrum Electric transitional probabilities

西藏高原不同树龄核桃林土壤细菌多样性及其影响因素分析

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北京林业大学学报 2023年第11期45卷 100-109页

作者：高禾苗任爱天张绍聪袁龙义长江大学园艺园林学院湖北荆州434025

【目的】土壤细菌对土壤生态系统功能和健康维持起着重要作用。在了解核桃林土壤细菌群落随林龄的变化规律的基础上,结合土壤因子进一步探究土壤微生物群落与土壤理化性质及土壤酶活性之间的关系。阐明土壤微生物群落变化的驱动因素,为... 详细信息

【目的】土壤细菌对土壤生态系统功能和健康维持起着重要作用。在了解核桃林土壤细菌群落随林龄的变化规律的基础上,结合土壤因子进一步探究土壤微生物群落与土壤理化性质及土壤酶活性之间的关系。阐明土壤微生物群落变化的驱动因素,为该地区核桃林的高效可持续经营管理提供科学依据。【方法】以不同种植年限(平均年龄8年、50年和100年以上)西藏核桃林为研究对象,基于高通量测序技术,研究不同树龄下土壤微生物组成及多样性的变化,并结合土壤理化因子进一步探究种植年限对土壤微生物群落的影响。【结果】(1)核桃种植年限没有显著影响细菌丰富度,但是古核桃林(100年以上)显著降低了细菌香农指数、优势度指数和均匀度指数。(2)变形菌门、酸杆菌门、厚壁菌门、芽单胞菌门、黏球菌门、放线菌门、拟杆菌门和绿弯菌门是土壤细菌优势菌门。不同树龄下部分微生物类群的相对丰度差异显著,随着种植年限的增长,土壤放线菌门的相对丰度增加,绿弯菌门的相对丰度降低,此外拟杆菌门的相对丰度呈现先增加后降低的趋势。(3)非度量多维尺度分析结果显示,不同种植年限核桃林土壤细菌群落组成之间存在显著差异。同时,冗余分析表明,土壤硝态氮含量对细菌群落组成影响显著。(4)相关性分析也显示土壤酶和土壤理化性质与微生物多样性以及优势菌门之间存在显著相关关系。【结论】核桃定植年限通过改变土壤理化性质和酶活性,改变了土壤微生物群落的多样性和群落结构,其中古核桃林细菌群落多样性显著降低,加剧了土壤微生态失衡。研究结果为明确不同龄林核桃林土壤微生物群落特征研究提供重要补充。在实际生产中除更新核桃树外,可合理使用无机和有机肥或者微生物菌肥,从而维护核桃林土壤生态系统的稳定。

关键词：西藏高原核桃林微生物多样性种植年限土壤特性酶活性

近20年我国重金属超积累植物种质资源筛选研究进展

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生态毒理学报 2022年第2期17卷 96-108页

作者：郭松明余海波袁龙义长江大学植物生态与环境修复研究所荆州434025 长江大学园艺园林学院荆州434025

土壤重金属污染已成为环境问题的研究热点,而植物修复技术是一种致力于修复土壤重金属污染的新方法,其中超积累植物修复是治理土壤重金属污染的关键方法和便捷技术,是实现人类社会可持续发展的重要手段之一。笔者对我国近20年来的重金... 详细信息

土壤重金属污染已成为环境问题的研究热点,而植物修复技术是一种致力于修复土壤重金属污染的新方法,其中超积累植物修复是治理土壤重金属污染的关键方法和便捷技术,是实现人类社会可持续发展的重要手段之一。笔者对我国近20年来的重金属超积累植物的种质资源进行了收集归纳,对农作物同超积累植物间套作种植的修复应用实例进行了分析列举,且对超积累植物修复推广的限制因素进行了总结,并在此研究与应用现状的基础上对超积累植物的界定、应用、筛选和相关试验等一系列研究工作进行了展望,以期为超积累植物种质资源的筛选与应用提供理论依据和实例参考。

关键词：重金属污染超积累植物种质资源筛选及应用

Global adaptive output-feedback tracking with prescribed performance for uncertain nonlinear systems

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Science China(Information Sciences) 2024年第5期67卷 150-164页

作者： yuan WANG Yungang LIU School of Control Science and Engineering Shandong University

At present, one typical control strategy for guaranteeing transient and steady-state performance is funnel control and prescribed performance control. The strategy features completely discarding the system nonlinearities, even if they are completely known and available. Such an intrinsic feature requires the controller to produce a larger control effect to eliminate the negative impact caused by the high nonlinearities, leading to a conservative controller. In this paper, we fully take advantage of known information on nonlinearities in control design, instead of completely discarding it as done in funnel control. Particularly, we leverage adaptive techniques(i.e., high-gain dynamic compensation) to deal with unknown system nonlinearities. Meanwhile, we integrate the tools of output feedback, tracking control, and the performance *** such, an adaptive output-feedback scheme is developed for global tracking with spatiotemporal performance specifications: arbitrarily given tracking accuracy and accuracy-ensured time. A simulation example supports the developed approach.

关键词： uncertain nonlinear systems output feedback prescribed performance unknown control direction dynamic high gain global tracking

Collective Molecular Machines: Multidimensionality and Reconfigurability

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Nano-Micro Letters 2024年第8期16卷 309-340页

作者： Bin Wang yuan Lu Department of Chemical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Molecular machines are key to cellular activity where they are involved in converting chemical and light energy into efficient mechanical *** the last 60 years,designing molecular structures capable of generating unidirectional mechanical motion at the nanoscale has been the topic of intense *** progress has been made,attributed to advances in various fields such as supramolecular chemistry,biology and nanotechnology,and ***,individual molecular machines are only capable of producing nanometer work and generally have only a single *** order to address these problems,collective behaviors realized by integrating several or more of these individual mechanical units in space and time have become a new *** this review,we comprehensively discuss recent developments in the collective behaviors of molecular *** particular,collective behavior is divided into two *** is the appropriate integration of molecular machines to efficiently amplify molecular motions and deformations to construct novel functional *** other is the construction of swarming modes at the supramolecular level to perform nanoscale or microscale *** discuss design strategies for both modes and focus on the modulation of features and ***,in order to address existing challenges,the idea of transferring experience gained in the field of micro/nano robotics is presented,offering prospects for future developments in the collective behavior of molecular machines.

关键词： Molecular machines Collective control Collective behaviors DNA Biomolecular motors