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How do Plant Morphological Characteristics, SpeciesComposition and Richness Regulate Eco-hydrological Function?

Journal of Integrative Plant Biology 2010年第12期52卷 1086-1099页

作者： Zhen-Hong Wang chang-qun duan College of Life Sciences Guizhou University Guiyang 550025 China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation the Chinese Academy of Sciences & Ministry of Water Resources Yangling 712100 China College of Life Sciences Yunnan University Kunming 650091 China

Although considerable research has focused on the relationship between ecosystem structure and function, interactions of plant morphological characteristics, species composition and richness with eco-hydrological functions remain unclear. We measured water adherence （i.e. the capacity of a plant species to retain water）, documented plant surface morphology and observed surface runoff at three sites in China. The adhering water ratios for each plant species differed, ranging from 17.1% to 151.5% in leaves, and from 14.4% to 41.1% in branches. Small, light-weight, soft, non-cuticularized leaves that were densely situated on small branches showed good water adherence. The next best adherence was found by branches with intermediately coarse surfaces. The plant species with high standing biomass also showed good water adherence, and the contribution of a species to total adherence was dependent upon its aboveground standing biomass. Vegetation parameters strongly affected water adherence, whereas the effect of species richness was not significant. Conversely, species richness showed a significant influence on surface runoff. The effect of plant morphological characteristics and composition constitutes a basic process in the regulation of eco-hydrological function, and vegetation parameters play somewhat different roles in that regulation. The key roles must therefore be considered from a management perspective.

关键词： PLANT morphology PLANT species PLANTS -- Composition BIOTIC communities PLANT-water relationships SPECIES diversity ECOHYDROLOGY

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Toxicity assessment for chlorpyrifos-contaminated soil with three different earthworm test methods

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Journal of Environmental Sciences 2007年第8期19卷 854-858页

作者： ZHOU Shi-ping DUAN Chang-Qun FU Hui CHEN Yu-hui WANG Xue-hua YU Ze-fen Laboratory for Conservation and Utilization of Bio-Resource and School of Life Science Yunnan University Kunming 650091 China. Department of Basic Courses Southwestern Forestry College Yunnan 650224 China

Earthworm toxicity tests are useful tools for terrestrial risk assessment but require a hierarchy of test designs that differ in effect levels （behavior, sublethal, lethal）. In this study, the toxicity of chlorpyrifos contaminated soil on earthworms was assessed. In addition to the acute and chronic tests, an avoidance response test was applied. Earthworms were exposed to sublethal and lethal concentration of chlorpyrifos, and evaluated for acute toxicity, growth, fecundity and avoidance response after a certain exposure period. The test methods covered all important ecological relevant endpoints （acute, chronic, behavioral）. Concentration of 78.91 mg/kg, chlorpyrifos caused significant toxic effects in all test methods, but at lower test concentrations, only significant chronic toxic effects could be observed. In present study, chlorpyrifos had adverse effect on growth and fecundity in earthworm exposed to 5 mg/kg chlorpyrifos after eight weeks. The avoidance response test, however, showed significant repellent effects at concentration of 40 mg/kg chlorpyrifos. For chlorpyrifos, concentration affecting avoidance response was far greater than growth and fecundity, it seemed likely that earthworms were not able to escape from pesticide-contaminated soil into the clean soil in field and hence were exposed continuously to elevated concentrations of pesticides.

关键词： chlorpyrifos earthworms avoidance response survival reproduction test

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Treatment of radiation-induced brain injury with bisdemethoxycurcumin

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Neural Regeneration Research 2023年第2期18卷 416-421页

作者： Yun-Qian chang Gui-Juan Zhou Hong-Mei Wen duan-qun He Chen-Lin Xu Ya-Rui Chen Yi-Hui Li Shuang-Xi Chen Zi-Jian Xiao Ming Xie Department of Neurology The First Affiliated HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan ProvinceChina Department of Neurology The Second Affiliated HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan ProvinceChina Department of Nursing Youxian People’s HospitalZhuzhouHunan ProvinceChina Department of Neurology Shenzhen Baoan People’s Hospital(Group)The Second People’s HospitalShenzhenGuangdong ProvinceChina Department of Neurology Xiangxi Autonomous Prefecture People’s HospitalJishouHunan ProvinceChina

Radiation therapy is considered the most effective non-surgical treatment for brain tumors.However,there are no available treatments for radiation-induced brain injury.Bisdemethoxycurcumin(BDMC)is a demethoxy derivative of curcumin that has anti-proliferative,anti-inflammatory,and anti-oxidant properties.To determine whether BDMC has the potential to treat radiation-induced brain injury,in this study,we established a rat model of radiation-induced brain injury by administe ring a single 30-Gy vertical dose of irradiation to the whole brain,followed by intraperitoneal injection of 500μL of a 100 mg/kg BDMC solution every day for 5 successive weeks.Our res ults showed that BDMC increased the body weight of rats with radiation-induced brain injury,improved lea rning and memory,attenuated brain edema,inhibited astrocyte activation,and reduced oxidative stress.These findings suggest that BDMC protects against radiationinduced brain injury.

关键词： astrocytes bisdemethoxycurcumin brain edema brain tumor curcumin learning and memory neuronal injury oxidative stress radiation therapy radiation-induced brain injury

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Phosphate Solubilizing Ability and Phylogenetic Diversity of Bacteria from P-Rich Soils Around Dianchi Lake Drainage Area of China

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Pedosphere 2012年第5期22卷 707-716页

作者： YANG Pei-Xiang MA Li CHEN Ming-Hui XI Jia-Qin HE Feng DUAN Chang-Qun MO Ming-He FANG Dun-Huang duan Yan-Qing YANG Fa-Xiang Laboratory for Conservation and Utilization of Bio-Resources&Ministry of Education Key Laboratory for Microbial Resources Yunnan UniversityKunming 650091(China) Zhengzhou Tobacco Research Institute of China National Tobacco Corporation Zhengzhou 450001(China) Yunnan Academy of Tobacco Agricultural Science Yuxi 653100(China) Technology Department of Hongyunhonghe Group Kunming 650202(China) Yunnan Yunye Fertilizer Co. Ltd.Kunming 650217(China)

The phylogenetic diversity of phosphate solubilizing bacteria (PSB) distributed in P-rich soils in the Dianchi Lake drainage area of China was characterized, and the tricalcium phosphate (TCP) solubilizing activities of isolated PSB were determined. Among 1328 bacteria isolated from 100 P-rich soil samples, 377 isolates (28.39% of the total) that exhibited TCP solubilization activity were taken as PSB. These PSB showed different abilities to solubilize TCP, with the concentrations of solubilized P in bacterial cultures varying from 33.48 to 69.63 mg L-1. A total of 123 PSB isolates, with relatively high TCP solubilization activity (> 54.00 mg L-1), were submitted for restriction fragment length polymorphism (RFLP) analysis, which revealed 32 unique RFLP patterns. Based on these patterns, 62 representative isolates, one to three from each RFLP pattern, were selected for 16S rRNA sequencing. Phylogenetic analysis placed the 123 PSB into three bacterial phyla, namely Proteobacteria, Actinobacteria and Firmicutes. Members of Proteobacteria were the dominant PSB, where 107 isolates represented by 26 RFLP patterns were associated with the genera of Burkholderia, Pseudomonas, Acinetobacter, Enterobacter, Pantoea, Serratia, Klebsiella, Leclercia, Raoultella and Cedecea. Firmicutes were the subdominant group, in which 13 isolates were affliated with the genera of Bacillus and Brevibacterium. The remaining 3 isolates were identified as three species of the genus Arthrobacter. This research extends the knowledge on PSB in P-rich soils and broadens the spectrum of PSB for the development of environmentally friendly biophosphate fertilizers.

关键词：系统发育多样性解磷细菌解磷能力滇池流域土壤限制性片段长度多态性 RFLP图谱伯克霍尔德氏菌

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Study on the response of wheat to lead, cadmium and zinc

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Journal of Environmental Sciences 1998年第2期10卷 111-117页

作者： Meng Ling Tan De-yong Wang Huan-xiao DUAN Chang-Qun duan Pei-shang Gao Shang-yi Department of Biology Yunnan UniversityKunming 650091China

Ｓｔｕｄｙｏｎｔｈｅｒｅｓｐｏｎｓｅｏｆｗｈｅａｔｔｏｌｅａｄ，ｃａｄｍｉｕｍａｎｄｚｉｎｃＭｅｎｇＬｉｎｇ，ＴａｎＤｅｙｏｎｇ，ＷａｎｇＨｕａｎｘｉａｏ，ＤｕａｎＣｈａｎｇｑｕｎ，ＤｕａｎＰｅｉｓｈａｎｇ... 详细信息

Ｓｔｕｄｙｏｎｔｈｅｒｅｓｐｏｎｓｅｏｆｗｈｅａｔｔｏｌｅａｄ，ｃａｄｍｉｕｍａｎｄｚｉｎｃＭｅｎｇＬｉｎｇ，ＴａｎＤｅｙｏｎｇ，ＷａｎｇＨｕａｎｘｉａｏ，ＤｕａｎＣｈａｎｇｑｕｎ，ＤｕａｎＰｅｉｓｈａｎｇ，ＧａｏＳｈａｎｇｙｉＤｅｐａｒ...

关键词： lead cadmium zinc wheat gene transcription.

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柴河流域不同农田种植模式下沟渠底泥氮磷及有机质的赋存特征

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生态与农村环境学报 2017年第6期33卷 519-524页

作者：吴晓妮付登高段昌群昆明学院生命科学与技术系云南昆明650214 云南大学生态学与环境学院云南昆明650091

于旱季及雨季末期对柴河流域不同农田种植模式下沟渠底泥进行原位采集,分析了沟渠底泥中养分含量变化特征及影响养分变化的主要因素。结果表明:除有效磷外,沟渠底泥有机质、全氮、碱解氮及全磷含量均表现为大棚>蔬菜地>玉米地,说明不同... 详细信息

于旱季及雨季末期对柴河流域不同农田种植模式下沟渠底泥进行原位采集,分析了沟渠底泥中养分含量变化特征及影响养分变化的主要因素。结果表明:除有效磷外,沟渠底泥有机质、全氮、碱解氮及全磷含量均表现为大棚>蔬菜地>玉米地,说明不同农田利用及管理方式是导致沟渠底泥养分产生差异的主要因素,而沟渠水分条件及植被的变化则导致雨季前后沟渠底泥养分呈现不同的时空差异。沟渠养分的长期积累将影响沟渠湿地系统对径流污染物的去除能力。因此,优化农田种植方式及管理模式仍是滇池流域面源污染防控中最重要的内容之一。

关键词：种植方式沟渠底泥养分赋存柴河流域

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2000～2015年中国地级市化肥使用量的时空变化特征

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环境科学 2019年第10期40卷 4733-4742页

作者：潘晓东李品冯兆忠段昌群云南大学生态学与环境学院云南省高原山地生态与退化环境修复重点实验室昆明650091 中国科学院生态环境研究中心城市与区域生态国家重点实验室北京100085 南京信息工程大学应用气象学院南京210044

化肥在农业生产中对粮食增产起到至关重要作用,但过量使用也带来诸如地表水富营养化、土壤结构恶化及农业承载力下降等一系列环境问题.目前对于化肥的研究多集中于利用效率方面,而空间变化特征的研究很少,充分认识化肥使用量空间上的变... 详细信息

化肥在农业生产中对粮食增产起到至关重要作用,但过量使用也带来诸如地表水富营养化、土壤结构恶化及农业承载力下降等一系列环境问题.目前对于化肥的研究多集中于利用效率方面,而空间变化特征的研究很少,充分认识化肥使用量空间上的变化对我国农业的可持续发展同样具有重要意义.基于2000~2015年全国地级市化肥折纯使用量和播种面积、粮食产量等数据,采用空间自相关分析、冷热点分析、核密度分析和标准差椭圆分析等方法,比较了2000、2005、2010和2015年这4年全国尺度各地区化肥使用总量及单位面积化肥使用负荷的时空变化特征.结果表明:①2000~2015年我国的化肥折纯使用量呈直线增加趋势,而在区域内一直处于比较高的集聚状态.化肥折纯使用量经历2000~2005年区域聚集状态增强,2005~2010年聚集状态减弱,2010~2015年又增加的过程.②从全国化肥使用的空间分布来看,2000~2015化肥使用总量呈现增加趋势,主要表现在化肥使用量超标的地级市变多,区域变广.东部经济发展较快的地区,如广东省和福建省由于播种面积减少比例大于化肥使用量的增长比例,导致超标地级市较为密集.③2000~2015年我国粮食重心的移动轨迹和化肥使用量的移动轨迹不相符,粮食重心往东北地区移动,而化肥使用量的重心往西部移动.一是表明东北地区的商品粮地位越来越重要,二是表明我国西部地区化肥使用量逐渐增加,有超标的趋势,应加以重视.

关键词：化肥使用量时空变化冷热点分析核密度分析标准差椭圆

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Inkjet-Printed Organic Solar Cells and Perovskite Solar Cells: Progress,Challenges, and Prospect

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Chinese Journal of Polymer Science 2023年第8期41卷 1169-1197,I0005页

作者： Xing-Ze Chen qun Luo chang-Qi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230027China i-Lab&Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

In recent years,the power conversion efficiency of organic solar cells(OSCs)and perovskite(PVSCs)has increased to over 19%and25%,respectively.Meanwhile,the long-term stability of OSCs and PVSCs was also significantly improved with a better understanding of the degradation mechanism and the improvement of materials,morphology,and interface stability.As both the efficiency and lifetime of solar cells are approaching the commercialization limit,fabrication methods for large-area OSCs and PVSCs that can be directly transferred from lab to fab become essential to promote the industrialization of OSCs and PVSCs.Compared with the coating methods,inkjet printing is a mature industrial technology with the advantages of random digital patterning,excellent precision and fast printing speed,which is considered to have great potential in solar cell fabrication.Many efforts have been devoted to developing inkjet-printed OSCs and PVSCs,and much progress has been achieved in the last few years.In this review,we first introduced the working principle of inkjet printing,the rheology requirements of inks,and the behaviors of the droplets.We then summarized the recent research progresses of the inkjet-printed OSCs and PVSCs to facilitate knowledge transfer between the two technologies.In the end,we gave a perspective on inkjet-printed OSCs and PVSCs.

关键词： Organic solar cells Perovskite solar cells Inkjet printing Ink formulation Morphology control

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高校生态环境类课程非标准化考核模式的探索与实践

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高校生物学教学研究（电子版） 2019年第6期9卷 24-28页

作者：付登高段昌群云南大学生态学与环境学院

非标准化考核已成为目前高校检验教学效果、学生课程考核的重要环节。本文在分析当前我国高校传统课程考核问题的前提下,以生态环境类课程为研究对象,构建了生态环境类课程非标准化考核体系,从考核内容、形式、成绩评定和反馈机制等方... 详细信息

非标准化考核已成为目前高校检验教学效果、学生课程考核的重要环节。本文在分析当前我国高校传统课程考核问题的前提下,以生态环境类课程为研究对象,构建了生态环境类课程非标准化考核体系,从考核内容、形式、成绩评定和反馈机制等方面进行了分析和探讨,并结合云南大学“环境生物学”教学实践情况,对课程非标准化考核取得的效果及可能存在的问题进行了分析。

关键词：非标准化考核课程教学生态环境类课程改革实践

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ST2负向调控铜绿假单胞菌外膜囊泡诱导肺上皮细胞分泌细胞因子

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中国临床药理学杂志 2022年第11期38卷 1185-1189页

作者：郭艳飞徐昌健段乐平任群峰郴州市第一人民医院心血管内科湖南郴州423000 郴州市第一人民医院重症医学科湖南郴州423000

目的研究受体分子ST2在铜绿假单胞菌外膜囊泡(OMVs)诱导肺上皮细胞分泌促炎细胞因子中的负向调控作用。方法将气道上皮细胞BEAS-2B分为对照组和低、中、高浓度实验组。对照组给予等体积磷酸盐缓冲液刺激;低、中、高实验组分别用1,10和30... 详细信息

目的研究受体分子ST2在铜绿假单胞菌外膜囊泡(OMVs)诱导肺上皮细胞分泌促炎细胞因子中的负向调控作用。方法将气道上皮细胞BEAS-2B分为对照组和低、中、高浓度实验组。对照组给予等体积磷酸盐缓冲液刺激;低、中、高实验组分别用1,10和30μg·mL^(-1)的OMVs刺激。用实时荧光定量聚合酶链反应和Western blot法分别检测ST2 mRNA和蛋白的表达水平,用Western blot法检测细胞核内p65、H3和H4乙酰化,用酶联免疫吸附实验法检测肿瘤坏死因子-α(TNF-α)和白细胞介素-8(IL-8)的分泌,用染色质共沉淀检测组蛋白和ST2启动子的结合,用荧光素报告基因测定核转录因子κB(NF-κB)的酶活性。结果BEAS-2B细胞经OMVs处理后,低、中、高浓度实验组均可导致ST2转录水平和翻译水平明显增高,并能上调细胞核内p65的表达水平以及细胞核内H3和H4乙酰化;同时,低、中、高浓度实验组的TNF-α和IL-8分泌水平也显著增高。染色质共沉淀结果显示,H3和H4组蛋白能和ST2启动子区域结合。报告基因结果也显示,ST2能和NF-κB启动子结合,并抑制NF-κB的活性。结论铜绿假单胞菌OMVs经NF-κB诱导ST2表达,后者可抑制NF-κB的活性以及TNF-α和IL-8分泌。

关键词：铜绿假单胞菌外膜囊泡 ST2

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