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大花紫薇EMS诱变育种研究
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作者 梁建 张宝津 +3 位作者 刘世晗 孙旭高 方姝懿 邓小梅 《华南农业大学学报》 北大核心 2025年第2期203-211,共9页
【目的】为了丰富大花紫薇育种方式,探究利用甲基磺酸乙醇(EMS)诱变的最适条件。【方法】以大花紫薇的成熟种子为研究材料,比较和分析EMS不同浓度和处理时间对大花紫薇种子萌发及幼苗生长的影响。【结果】EMS处理能够抑制大花紫薇种子萌... 【目的】为了丰富大花紫薇育种方式,探究利用甲基磺酸乙醇(EMS)诱变的最适条件。【方法】以大花紫薇的成熟种子为研究材料,比较和分析EMS不同浓度和处理时间对大花紫薇种子萌发及幼苗生长的影响。【结果】EMS处理能够抑制大花紫薇种子萌发,EMS浓度和处理时间对抑制效果有显著影响。20 g·L^(-1) EMS处理12 h后全部致死;随着EMS浓度升高、处理时间变长,种子发芽起始时间推迟,发芽持续时间变长,胚轴及胚根生长受到的抑制越显著;16 g·L^(-1) EMS处理12 h和18 g·L^(-1) EMS处理10 h,其相对致死率分别为47.99%和55.02%,最接近半致死剂量,是大花紫薇EMS诱变可选择的处理组合;EMS处理抑制大花紫薇幼苗生长,且在20 g·L^(-1) EMS处理8 h时最明显,其株高、冠幅、地径、叶面积分别为8.28 cm、9.66 cm、1.70 mm和29.32 cm^(2),而叶形指数在20 g·L^(-1) EMS处理8 h最大,为2.44。【结论】本研究确定了接近大花紫薇种子EMS诱变半致死剂量的处理组合,可为该植物的新品种培育提供理论基础。 展开更多
关键词 大花紫薇 ems诱变 育种 种子萌发 幼苗生长
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EMS诱变对小麦西农979种子活力的探索
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作者 闫占峰 任众 +2 位作者 郑新 杨蕊交 杨明明 《种子科技》 2025年第2期6-8,18,共4页
为了探明甲基磺酸乙酯(EMS)对小麦西农979种子诱变的影响并构建突变体库,加快小麦新品种选育进程。选用西农979种子为材料,设置了5个EMS处理体积分数和3个处理时间进行化学诱导,并对种子发芽率及幼苗生长的诱变效应进行研究。结果表明,... 为了探明甲基磺酸乙酯(EMS)对小麦西农979种子诱变的影响并构建突变体库,加快小麦新品种选育进程。选用西农979种子为材料,设置了5个EMS处理体积分数和3个处理时间进行化学诱导,并对种子发芽率及幼苗生长的诱变效应进行研究。结果表明,随着EMS浸种体积分数和时间的增加,种子萌发及幼苗生长逐渐受到抑制,在体积分数1.2%、1.5%下浸种12 h和18 h对种子萌发及幼苗生长抑制作用最强,极大地降低了西农979的出苗率、株高和根长,导致幼苗生长缓慢。以存活率达到50%为标准,通过回归方程计算出在6、12、18 h浸种时间下,EMS体积分数的半致死剂量分别为0.90%、0.65%、0.38%,可作为西农979 EMS诱变建立突变体库的适合条件。为小麦EMS诱变西农979突变体奠定了研究基础,为小麦诱变育种提供了研究方向。 展开更多
关键词 甲基磺酸乙酯(ems) 小麦西农979 种子出苗 幼苗生长
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Relationship between the use of smart medical services and mental health status
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作者 Elif Sarac 《World Journal of Psychiatry》 SCIE 2025年第1期21-25,共5页
In this editorial,I comment on the article by Zhang et al.To emphasize the importance of the topic,I discuss the relationship between the use of smart medical devices and mental health.Smart medical services have the ... In this editorial,I comment on the article by Zhang et al.To emphasize the importance of the topic,I discuss the relationship between the use of smart medical devices and mental health.Smart medical services have the potential to positively influence mental health by providing monitoring,insights,and inter-ventions.However,they also come with challenges that need to be addressed.Understanding the primary purpose for which individuals use these smart tech-nologies is essential to tailoring them to specific mental health needs and prefe-rences. 展开更多
关键词 Smart devices Medical service USAGE PEOPLE RELATIONSHIP Mental health status
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ISO/TS 9546 on third-party payment services released
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《China Standardization》 2025年第1期17-17,共1页
Third-party payment (TPP) is an evolving model of payment services provided by third-party payment service providers (TPPSPs) for every end user using a payment account in another entity. TPP plays an important role g... Third-party payment (TPP) is an evolving model of payment services provided by third-party payment service providers (TPPSPs) for every end user using a payment account in another entity. TPP plays an important role globally by complementing the offer of the traditional financial market players and contributes to the efficiency of payment transactions and financial systems. 展开更多
关键词 ISO/TS services FINANCIAL
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Impact of Land Use Change on Ecosystem Services Values in Danjiangkou Reservoir Area,China in the Context of National Water Network Project Construction
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作者 LIU Linghua ZHENG Liang +3 位作者 WANG Ying LIU Chongchong ZHANG Bowen BI Yuzhe 《Chinese Geographical Science》 2025年第1期111-130,共20页
Investigating the ecological impact of land use change in the context of the construction of national water network project is crucial,as it is imperative for achieving the sustainable development goals of the nationa... Investigating the ecological impact of land use change in the context of the construction of national water network project is crucial,as it is imperative for achieving the sustainable development goals of the national water network and guaranteeing regional ecological stability.Using the Danjiangkou Reservoir Area(DRA),China as the study area,this paper first examined the spatiotemporal dynamics of natural landscape patterns and ecosystem service values(ESV)in the DRA from 2000 to 2018 and then investigated the spatial clustering characteristics of the ESV using spatial statistical analysis tools.Finally,the patch-generating land use simulation(PLUS)model was used to simulate the natural landscape and future changes in the ESV of the DRA from 2018 to 2028 under four different development scenarios:business as usual(BAU),economic development(ED),ecological protection(EP),and shoreline protection(SP).The results show that:during 2000-2018,the construction of water facilities had a significant impact on regional land use/land cover(LULC)change,with a 24830 ha increase in watershed area.ESV exhibited an increasing trend,with a significant and growing spatial clustering effect.The transformation of farmland to water bodies led to accelerated ESV growth,while the transformation of forest land to farmland led to a decrease in the ESV.Normalized difference vegetation index(NDVI)had the strongest effect on the ESV.ESV exhibited a continuous increase from 2018 to 2028 under all the simulation scenarios.The EP scenario had the greatest increase in ESV,while the ED scenario had the smallest increase.The findings suggest that projected land use patterns under different scenarios have varied impacts on ecosystem services(ESs)and that the management and planning of the DRA should balance social,economic,ecological,and security benefits.nomic,ecological,and security benefits. 展开更多
关键词 ecosystem services value(ESV) national water network project of China South-to-North Water Diversion Project(SNWDP)of China multi-scenario simulation Danjiangkou Reservoir Area China
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甲基磺酸乙酯(EMS)对谷子种子及幼苗活力的影响 被引量:1
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作者 闫锋 董扬 +7 位作者 赵富阳 侯晓敏 李清泉 王冰雪 周超 杨慧莹 范国权 刘凯 《现代农业研究》 2024年第7期1-5,共5页
为了探明甲基磺酸乙酯(EMS)诱变嫩选18种子构建突变体库的最适条件,加快品种选育进程,本研究对嫩选18种子进行了3种处理时间、3种EMS处理浓度的化学诱导,并对M1种子发芽及幼苗生长的诱变效应进行研究。结果表明:与对照相比,EMS处理在浓... 为了探明甲基磺酸乙酯(EMS)诱变嫩选18种子构建突变体库的最适条件,加快品种选育进程,本研究对嫩选18种子进行了3种处理时间、3种EMS处理浓度的化学诱导,并对M1种子发芽及幼苗生长的诱变效应进行研究。结果表明:与对照相比,EMS处理在浓度0.4%下浸种6 h对嫩选18的发芽率及幼苗生长影响差异不显著,随着EMS浸种浓度、时间增加,种子萌发及幼苗生长逐渐受到抑制,在1.2%浓度下浸种14 h对种子萌发及幼苗生长抑制作用最强,极大降低了嫩选18的发芽势、发芽率、成苗率,并且导致幼苗生长缓慢。以存活率达到50%为标准,通过回归方程计算出在6 h、10 h、14 h浸种时间下,EMS浓度的半致死剂量分别为0.99%、0.72%、0.38%,可作为嫩选18 EMS诱变建立突变体库的适合条件。 展开更多
关键词 谷子 种子萌发 幼苗生长 甲基磺酸乙酯(ems)
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On the Experience, Problems in Science and Technology Services of Basic Scientific Research Institutes and Suggestions——Taking Zhenjiang Institute of Agricultural Sciences in Hilly Areas of Jiangsu as an Example
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作者 王敬根 单延博 +1 位作者 曲直 刘照亭 《Agricultural Science & Technology》 CAS 2017年第12期2681-2683,2686,共4页
Taking the Jiangsu Province as Zhenjiang Academy of Agricultural Sciences in Hilly Areas of an example, the paper elaborated the advanced practices of agricultural research institutes in agricultural science and techn... Taking the Jiangsu Province as Zhenjiang Academy of Agricultural Sciences in Hilly Areas of an example, the paper elaborated the advanced practices of agricultural research institutes in agricultural science and technology services and analyzed the difficulties and solutions in the services. process of science and technologyservices. 展开更多
关键词 Basic scientific research institutes Science and technology services EXPERIENCE Existing problems SOLUTIONS
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不同EMS处理时间对大豆诱变后代主要品质含量变化影响分析 被引量:1
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作者 王新风 汪辉 +1 位作者 侯云龙 王跃强 《大豆科技》 2024年第2期14-18,共5页
为探究不同EMS处理时间对大豆诱变后代主要品质含量变化的影响,文章利用0.5%EMS溶液处理大豆高蛋白品系公交1057-1,分别浸泡4、7和10 h(清水冲洗处理为对照),对播种后获得的连续4代诱变后代主要品质含量变化进行分析。结果表明,与对照相... 为探究不同EMS处理时间对大豆诱变后代主要品质含量变化的影响,文章利用0.5%EMS溶液处理大豆高蛋白品系公交1057-1,分别浸泡4、7和10 h(清水冲洗处理为对照),对播种后获得的连续4代诱变后代主要品质含量变化进行分析。结果表明,与对照相较,经EMS处理后的植株成活率随处理时间延长而降低。其中,经EMS-4处理后的植株成活率最高,为43.5%;经EMS-10处理后的植株成活率最低,仅为16.0%。不同EMS处理时间对大豆诱变后代的蛋白质含量影响显著,对脂肪含量影响不明显。其中经EMS-4处理的诱变后代蛋白质含量高于其他3组处理;经EMS-4处理后的M2代蛋白质含量发生显著分离,并出现超亲个体,脂肪含量变化不显著。 展开更多
关键词 甲基磺酸乙酯(ems) 大豆 蛋白质含量 脂肪含量
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达乌里胡枝子愈伤组织及种子EMS诱变研究 被引量:1
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作者 朱泯珏 陈橙 +4 位作者 史文甯 李景冲 殷俐娜 王仕稳 邓西平 《种子》 北大核心 2024年第3期1-10,共10页
为优化达乌里胡枝子愈伤诱导培养基的激素含量及比例,明确甲基磺酸乙酯(EMS)诱变愈伤组织及种子的最佳条件,本研究以达乌里胡枝子种子为外植体,探究了不同激素配比对愈伤诱导的影响,并针对愈伤组织和种子处理分别设置了两时间两浓度(2 h... 为优化达乌里胡枝子愈伤诱导培养基的激素含量及比例,明确甲基磺酸乙酯(EMS)诱变愈伤组织及种子的最佳条件,本研究以达乌里胡枝子种子为外植体,探究了不同激素配比对愈伤诱导的影响,并针对愈伤组织和种子处理分别设置了两时间两浓度(2 h和6 h,0.3%和0.9%)及三时间两浓度(6 h、8 h、10 h,0.4%、0.8%)的EMS处理时间和浓度的组合,研究各处理对愈伤分化系数和后期植株成活率以及种子发芽率、发芽势和幼苗表型变异的影响。结果表明,达乌里胡枝子种子愈伤的最佳激素配比为0.25 mg/L NAA+0.5 mg/L 6-BA+0.5 mg/L 2,4-D,此时达乌里胡枝子愈伤诱导率为94.9%。EMS诱变达乌里胡枝子愈伤组织的适宜浓度为0.3%,处理时间为6 h,分化系数和植株相对成活率分别为46.31%和47.78%,接近半致死范围,且生根数、根长和平均株高等指标与高浓度EMS处理相比受到的负面影响较小。EMS诱变达乌里胡枝子种子的适宜浓度为0.8%,处理时间10 h,发芽率、出苗率、成苗率分别为53.61%、51.06%和53.28%,均接近半致死量,同时发现多株幼苗叶片出现了明显的形态变异。本试验在达乌里胡枝子原有种质资源基础上,丰富了达乌里胡枝子突变体库,也为后续开展达乌里胡枝子诱变育种研究提供理论依据。 展开更多
关键词 达乌里胡枝子 ems 愈伤组织 种子诱变
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Toward Cloud Computing QoS Architecture:Analysis of Cloud Systems and Cloud Services 被引量:21
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作者 Mohammad Hossein Ghahramani MengChu Zhou Chi Tin Hon 《IEEE/CAA Journal of Automatica Sinica》 EI CSCD 2017年第1期6-18,共13页
Cloud can be defined as a new computing paradigm that provides scalable, on-demand, and virtualized resources for users. In this style of computing, users can access a shared pool of computing resources which are prov... Cloud can be defined as a new computing paradigm that provides scalable, on-demand, and virtualized resources for users. In this style of computing, users can access a shared pool of computing resources which are provisioned with minimal management efforts of users. Yet there are some obstacles and concerns about the use of clouds. Guaranteeing quality of service QoS by service providers can be regarded as one of the main concerns for companies tending to use it. Service provisioning in clouds is based on service level agreements representing a contract negotiated between users and providers. According to this contract, if a provider cannot satisfy its agreed application requirements, it should pay penalties as compensation. In this paper, we intend to carry out a comprehensive survey on the models proposed in literature with respect to the implementation principles to address the QoS guarantee issue. © 2014 Chinese Association of Automation. 展开更多
关键词 Cloud computing Distributed computer systems System of systems Systems engineering Telecommunication services Web services
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EMS诱变对鹰嘴紫云英种子萌发及幼苗表型特征的影响 被引量:1
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作者 喇黑麦 董文科 +5 位作者 马福钦 郑雨琴 陕亚宁 马菲阳 康婷婷 马晖玲 《草原与草坪》 CAS CSCD 2024年第3期116-124,共9页
【目的】筛选适宜鹰嘴紫云英的EMS诱变条件。【方法】以鹰嘴紫云英品种甘绿2号种子为试验材料,采用不同浓度(0、0.2%、0.4%、0.6%、0.8%)的甲基磺酸乙酯(EMS)进行不同时间(2、4、6、8 h)的诱变处理,探究EMS对鹰嘴紫云英种子萌发特征及... 【目的】筛选适宜鹰嘴紫云英的EMS诱变条件。【方法】以鹰嘴紫云英品种甘绿2号种子为试验材料,采用不同浓度(0、0.2%、0.4%、0.6%、0.8%)的甲基磺酸乙酯(EMS)进行不同时间(2、4、6、8 h)的诱变处理,探究EMS对鹰嘴紫云英种子萌发特征及表型变化的影响。【结果】低浓度和短时间EMS处理促进鹰嘴紫云英种子的萌发,随EMS浓度升高和诱变时间的增加,对鹰嘴紫云英种子萌发产生抑制作用。种子浸出液电导率随诱变条件的加深呈上升趋势,在2~6 h时,萌发期发芽率、发芽势、幼苗苗长和根长均随处理时间和诱变浓度的增加呈先升高后降低的趋势,在8 h处理下,随EMS浓度的增加呈逐渐降低趋势,EMS浓度在0.8%时,种子发芽率和发芽势均达到最低,较对照分别降低了54.45%和56.67%;经形态学筛选,发现有鹰嘴紫云英幼苗表现出幼苗矮小、停滞生长、叶片黄化、宽叶、窄叶、叶片发紫、诸多病斑等特殊变异性状。【结论】0.8%EMS处理6 h可作为最佳诱变组合;幼苗的生长随诱变时间和浓度增加而明显受到抑制,且表型变异类型也逐步增多。 展开更多
关键词 鹰嘴紫云英 ems诱变 种子萌发 表型特征
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A Component Mining Approach to Incubate Grid Services in Object-Oriented Legacy Systems 被引量:2
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作者 Jian-Zhi Li Zhuo-Peng Zhang Bing Qiao Hong-Ji Yang 《International Journal of Automation and computing》 EI 2006年第1期47-55,共9页
This paper describes an approach for Grid service component mining in object-oriented legacy systems, applying software clustering, architecture recovery, program slicing and wrapping techniques to decompose a legacy ... This paper describes an approach for Grid service component mining in object-oriented legacy systems, applying software clustering, architecture recovery, program slicing and wrapping techniques to decompose a legacy system, analyse the concerned components and integrate them into a Grid environment. The resulting components with core legacy code function in a Grid service framework. 展开更多
关键词 Grid service legacy system software component software clustering architecture recovery program slicing.
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Selecting and applying quantification models for ecosystem services to forest ecosystems in South Korea 被引量:1
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作者 Hyun-Ah Choi Woo-Kyun Lee +4 位作者 Cholho Song Nicklas Forsell Seongwoo Jeon Joon Soon Kim So Ra Kim 《Journal of Forestry Research》 SCIE CAS CSCD 2016年第6期1373-1384,共12页
There is growing interest in using ecosystem services to aid development of management strategies that target sustainability and enhance ecosystem support to humans. Challenges remain in the search for methods and ind... There is growing interest in using ecosystem services to aid development of management strategies that target sustainability and enhance ecosystem support to humans. Challenges remain in the search for methods and indicators that can quantify ecosystem services using metrics that are meaningful in light of their high priorities. We developed a framework to link ecosystems to human wellbeing based on a stepwise approach. We evaluated prospective models in terms of their capacity to quantify national ecosystem services of forests. The most applicable models were subsequently used to quantify ecosystem services. The Korea Forest Research Institute model sat- isfied all criteria in its first practical use. A total of 12 key ecosystem services were identified. For our case study, we quantified four ecosystem functions, viz. water storage capacity in forest soil for water storage service, reduced suspended sediment for water purification service, reduced soil erosion for landslide prevention service, and reduced sediment yield for sediment regulation service. Water storage capacity in forest soil was estimated at 2142 t/ha, and reduced suspended sediment was estimated at 608 kg/ ha. Reduced soil erosion was estimated at 77 m^3/ha, and reduced sediment yield was estimated at 285 m^3/ha. These results were similar to those reported by previous studies. Mapped results revealed hotspots of ecosystem services around protected areas that were particularly rich in bio- diversity. In addition, the proposed framework illustrated that quantification of ecosystem services could be sup- ported by the spatial flow of ecosystem services. However, our approach did not address challenges faced when quantifying connections between ecosystem indicators and actual benefits of services described. 展开更多
关键词 CLASSIFICATION Ecosystem services Quantification Stepwise approach
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Driving Forces and Their Effects on Water Conservation Services in Forest Ecosystems in China 被引量:11
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作者 GONG Shihan XIAO Yang +2 位作者 XIAO Yi ZHANG Lu OUYANG Zhiyun 《Chinese Geographical Science》 SCIE CSCD 2017年第2期216-228,共13页
Identifying the driving forces that cause changes in forest ecosystem services related to water conservation is essential for the design of interventions that could enhance positive impacts as well as minimizing negat... Identifying the driving forces that cause changes in forest ecosystem services related to water conservation is essential for the design of interventions that could enhance positive impacts as well as minimizing negative impacts. In this study, we propose an assessment concept framework model for indirect-direct-ecosystem service (IN-DI-ESS) driving forces within this context and method for index construction that considers the selection of a robust and parsimonious variable set. Factor analysis was integrated into two-stage data envelopment analysis (TS-DEA) to determine the driving forces and their effects on water conservation services in forest ecosystems at the provincial scale in China. The results showed the following. 1) Ten indicators with factor scores more than 0.8 were selected as the minimum data set. Four indicators comprising population density, per capita gross domestic product, irrigation efficiency, and per capita food consumption were the indirect driving factors, and six indicators comprising precipitation, farmland into forestry or pasture, forest cover, habitat area, water footprint, and wood extraction were the direct driving forces. 2) Spearman's rank correlation test was performed to compare the overall effectiveness in two periods: stage 1 and stage 2. The calculated coefficients were 0.245, 0.136, and 0.579, respectively, whereas the tabulated value was 0.562. This indicates that the driving forces obviously differed in terms of their contribution to the overall effectiveness and they caused changes in water conservation services in different stages. In terms of the variations in different driving force effects in the years 2000 and 2010, the overall, stage 1, and stage 2 variances were 0.020, 0.065, and 0.079 in 2000, respectively, and 0.018, 0.063, and 0.071 in 2010. This also indicates that heterogeneous driving force effects were obvious in the process during the same period. Identifying the driving forces that affect service changes and evaluating their efficiency have significant policy implications for the management of forest ecosystem services. Advanced effectiveness measures for weak regions could be improved in an appropriate manner. In this study, we showed that factor analysis coupled with TS-DEA based on the IN-D1-ESS framework can increase the parsimony of driving force indicators, as well as interpreting the interactions among indirect and direct driving forces with forest ecosystem water conservation services, and reducing the uncertainty related to the internal consistency during data selection. 展开更多
关键词 driving effectiveness driving force factor analysis forest ecosystem two-stage data envelopment analysis water conservation service
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禾本科植物EMS诱变研究进展
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作者 彭辉 穆麟 +4 位作者 沈佳欣 张文杰 黄菁 黄雨珣 张志飞 《植物遗传资源学报》 CAS CSCD 北大核心 2024年第9期1417-1427,共11页
EMS是化学诱变中最常用的诱变剂,EMS诱变具有单个碱基点突变率高、成本低、易操作等优点,通过EMS诱变获得突变体可以为育种和基因功能研究提供有利的材料。EMS诱变技术的关键是确定EMS浓度和诱变时间,一般以达到半致死率的浓度和时间为... EMS是化学诱变中最常用的诱变剂,EMS诱变具有单个碱基点突变率高、成本低、易操作等优点,通过EMS诱变获得突变体可以为育种和基因功能研究提供有利的材料。EMS诱变技术的关键是确定EMS浓度和诱变时间,一般以达到半致死率的浓度和时间为最佳处理组合。禾本科植物中主要以种子为诱变材料,同时花粉、愈伤组织以及依靠营养繁殖的禾本科植物的营养器官也可以作为诱变材料。不同植物材料对EMS的耐受性不同,花粉最敏感,其次是愈伤组织,无性繁殖材料和种子的耐受性较强。突变体的筛选方式包括表型对比筛选、逆境定向筛选和正、反向遗传学筛选。本文综述了近年来EMS诱变技术在禾本科植物育种和基因功能研究中的应用,介绍了EMS的诱变原理、诱变剂浓度、处理时间、诱变处理材料的选择及突变体的筛选,并对未来禾本科植物中的EMS诱变研究进行了展望,为今后禾本科植物的EMS诱变研究提供参考。 展开更多
关键词 禾本科 ems 诱变 突变体
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甲基磺酸乙酯(EMS)对黄蜀葵植株表型性状和花黄酮类成分含量的影响及优株筛选
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作者 廖恩慧 郑玉红 +3 位作者 葛海涛 汪琼 王殿广 徐增莱 《植物资源与环境学报》 CAS CSCD 北大核心 2024年第6期94-101,共8页
以甲基磺酸乙酯(EMS)为化学诱变剂,对体积分数1.0%(T1)、1.2%(T2)、1.4%(T3)、1.6%(T4)EMS诱变处理后黄蜀葵〔Abelmoschus manihot(Linn.)Medik.〕植株表型性状和花黄酮类成分含量差异进行比较,对单株花产量和花黄酮类成分含量与植株表... 以甲基磺酸乙酯(EMS)为化学诱变剂,对体积分数1.0%(T1)、1.2%(T2)、1.4%(T3)、1.6%(T4)EMS诱变处理后黄蜀葵〔Abelmoschus manihot(Linn.)Medik.〕植株表型性状和花黄酮类成分含量差异进行比较,对单株花产量和花黄酮类成分含量与植株表型性状进行相关性分析,并基于单株花总黄酮产量进行优株筛选。结果表明:与对照组(体积分数0.0%EMS)相比,EMS处理组黄蜀葵株型变为接近丛生或丛生,叶裂片细长,花冠较小。4个EMS处理组黄蜀葵的株高较对照组显著(P<0.05)降低,茎粗与对照组差异不显著;随着EMS体积分数增加,叶片长、叶片宽、叶裂片长、叶裂片宽总体上先降低后升高,其中,体积分数1.4%和1.6%EMS处理组的叶片长、叶片宽、叶裂片长、叶裂片宽均高于或显著高于对照组;4个EMS处理组的花直径和花瓣宽低于或显著低于对照组,花瓣长和始花节数与对照组差异不显著,但体积分数1.4%和1.6%EMS处理组的单株开花数和单株花产量显著高于对照组。与对照组相比,4个EMS处理组花中6个黄酮类成分及总黄酮含量多无显著变化,仅体积分数1.0%和1.4%EMS处理组的棉皮素-8-O-β-D-葡萄糖醛酸苷含量以及体积分数1.0%EMS处理组的槲皮素-3′-O-葡萄糖苷含量显著升高。相关性分析结果显示:单株花产量与茎粗、叶片长、叶裂片长、始花节数和蒴果长显著正相关,与单株开花数极显著(P<0.01)正相关,而花中6个黄酮类成分和总黄酮含量与植株表型性状多无显著相关性。优株筛选结果显示:编号T3-3、T4-5、T3-1和T1-3植株的单株花总黄酮产量均在65 g以上,排名前4。总体来看,体积分数1.4%EMS的诱变效果最佳;并且,编号T3-3、T4-5、T3-1和T1-3单株可作为黄蜀葵高花总黄酮产量的优株。 展开更多
关键词 黄蜀葵 甲基磺酸乙酯(ems) 表型性状 黄酮类成分 优株筛选
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Hydrological Services by Mountain Ecosystems in Qilian Mountain of China: A Review 被引量:6
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作者 SUN Feixiang LYU Yihe +1 位作者 FU Bojie HU Jian 《Chinese Geographical Science》 SCIE CSCD 2016年第2期174-187,共14页
Hydrological service is a hot issue in the current researches of ecosystem service, particularly in the upper reaches of mountain rivers in dry land areas, where the Qilian Mountain is a representative one. The Qilian... Hydrological service is a hot issue in the current researches of ecosystem service, particularly in the upper reaches of mountain rivers in dry land areas, where the Qilian Mountain is a representative one. The Qilian Mountain, where forest, shrubland and grassland consist of its main ecosystems, can provide fresh water and many other ecosystem services, through a series of eco-hydrological process such as precipitation interception, soil water storage, and fresh water provision. Thus, monitoring water regulation and assessing the hydrological service of the Qilian Mountain are meaningful and helpful for the healthy development of the lower reaches of arid and semi-arid areas. In recent 10 years, hydrological services have been widely researched in terms of scale and landscape pattern, including water conservation, hydrological responses to afforestation and their ecological effects. This study, after analyzing lots of current models and applications of geographical information system(GIS) in hydrological services, gave a scientific and reasonable evaluation of mountain ecosystem in eco-hydrological services, by employing the combination of international forefronts and contentious issues into the Qilian Mountain. Assessments of hydrological services at regional or larger scales are limited compared with studies within watershed scale in the Qilian Mountain. In our evaluation results of forest ecosystems, it is concluded that long-term observation and dynamic monitoring of different types of ecosystem are indispensable, and the hydrological services and the potential variation in water supplement on regional and large scales should be central issues in the future research.v 展开更多
关键词 hydrological service water regulation hydrological response Qilian Mountain
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Geospatial Evaluation for Ecological Watershed Management II: Changes in Land Use—Land Cover Influence on Ecosystems Services 被引量:1
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作者 Isoken Aighewi Ali Ishaque Osarodion Nosakhare 《Journal of Geographic Information System》 2014年第3期246-257,共12页
Ecosystem services are a key to human survival and global sustainability. Consequently, there is the need to avoid unscrupulous or unplanned land use practices that can compromise these services in addition to the ong... Ecosystem services are a key to human survival and global sustainability. Consequently, there is the need to avoid unscrupulous or unplanned land use practices that can compromise these services in addition to the ongoing changes in the global climate whose potentially negative impact are yet to be fully comprehended thus far. The primary objective of this study was to evaluate the Land use—land cover changes of some Eastern Shore sub-watersheds of Maryland from 1986-2006 and qualitatively assess the impact of the changes on some key ecosystem services. Landsat-TM data for Maryland Eastern Shore in the United States were analyzed in ENVI and ArcGIS environment and data interpreted qualitatively. The result showed that forest lands increased during the study period and thus enhanced carbon sequestration favorable for mitigating global warming in the area. Also, the extent of surface water cover increased slightly, possibly due to rising sea level and a thus a potential threat to biodiversity and barrier islands nearby. There was also a significant increase in urban lands due to population increase and thus increase in the extent of impervious layers that could lead to reduced surface runoff and increase the potential for surface water quality impairment;this could lead to a reduction in the capacity of surface water ecosystem to provide clean/recreational waters. The increase in the extent of surface water cover was at the expense of the wetlands that shrunk, thereby threatening the coastal ecosystem’s ability to provide services such as storm and wave protection, nutrient cycling, and the protection of wildlife habitat. There was also a decrease in the extent of Agricultural lands which could lead to loss of food and fiber during the study period. There is therefore an urgent need to formulate or intensify existing policies to regulate land use from an ecological health standpoint in order to ensure sustainability of the various ecosystems within the watersheds of the Lower Eastern Shore of Maryland in the US, and similar coastal locations elsewhere. 展开更多
关键词 Land Use ECOSYSTEM services ECOLOGICAL Health GIS LANDSAT WETLANDS Surface Water
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Interactive Middleware Services for Heterogeneous Systems 被引量:1
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作者 Vasanthi Raghupathy Osamah Ibrahim Khalaf +2 位作者 Carlos Andrés Tavera Romero Sudhakar Sengan Dilip Kumar Sharma 《Computer Systems Science & Engineering》 SCIE EI 2022年第6期1241-1253,共13页
Computing has become more invisible, widespread and ubiquitoussince the inception of the Internet of Things (IoT) and Web of Things. Multipledevices that surround us meet user’s requirements everywhere. Multiple Midd... Computing has become more invisible, widespread and ubiquitoussince the inception of the Internet of Things (IoT) and Web of Things. Multipledevices that surround us meet user’s requirements everywhere. Multiple Middleware Framework (MF) designs have come into existence because of the rapiddevelopment of interactive services in Heterogeneous Systems. This resulted inthe delivery of interactive services throughout Heterogeneous Environments(HE). Users are given free navigation between devices in a widespread environment and continuously interact with each other from any chosen device. Numerous interactive devices with recent interactive platforms (for example, SmartPhones, Mobile Phones, Personal Computer (PC) and Personal Digital Assistant(PDA)) are available in the market. For easy access to information and servicesirrespective of the device used for working and even at the drastic change ofthe environment, the execution of applications on a broad spectrum of computingdevices is propelled by the availability of the above-mentioned platforms. Different applications that need interoperability to coordinate and correspond with eachother should be facilitated. Using a standard interface and data format, HE mustlink various devices from various platforms together to communicate with eachother. To aid the interactive services performed by a middleware framework thatoperates on Application Programming Interface (API) over HEs, this issue aims toendorse an Adaptable Service Application Programming Interface (ASAPI). 展开更多
关键词 MIDDLEWARE services ONTOLOGY INTEROPERABILITY
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芒果^(60)Co-γ、EMS诱变及SC-SSR分子标记遗传多样性分析
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作者 张月华 王军 +2 位作者 杨永利 马小卫 潘宏兵 《热带作物学报》 CSCD 北大核心 2024年第9期1801-1810,共10页
诱变育种是短时间内增加物种遗传多样性和表型变异的最有效方法之一。为探明诱变创制芒果突变体基因库可行性,本研究以凯特芒果为试验材料,通过^(60)Co-γ射线辐射枝条和EMS溶液浸泡种子创制诱变群体材料,利用SC-SSR分子标记进行遗传多... 诱变育种是短时间内增加物种遗传多样性和表型变异的最有效方法之一。为探明诱变创制芒果突变体基因库可行性,本研究以凯特芒果为试验材料,通过^(60)Co-γ射线辐射枝条和EMS溶液浸泡种子创制诱变群体材料,利用SC-SSR分子标记进行遗传多样性分析。结果表明:^(60)Co-γ射线辐射半致死剂量为31.37 Gy,0.2%EMS溶液浸泡半致死时间为5.9 h;利用16对SC-SSR引物分析100份诱变材料和1份凯特材料的遗传多样性,共检测出117个多态性位点,引物多态性条带百分比、多态性信息含量(PIC)、观测等位基因数(Na)、有效等位基因数(Ne)、Nei’s基因多样性指数(H)和Shannon’s信息指数(I)平均值分别为93.18%、0.610、1.923、1.583、0.334和0.493;试验材料间遗传相似系数在0.373~0.984之间,平均为0.779。诱变增加了芒果遗传信息,其中EMS诱变种子变异更大,本研究结果为芒果诱变育种提供了理论依据。 展开更多
关键词 芒果 ^(60)Co-γ射线辐射 ems诱变 SC-SSR分子标记
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