|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 入侵植物与重金属胁迫的相互作用研究进展显示文摘全球变化改变了植物群落的分布格局,包括入侵植物,而人为污染可能降低本地植物对入侵植物的抗性。因此,本文总结了近几十年本地植物、入侵植物和植物-土壤生态系统中重金属生物地球化学行为的研究,以加深我们对入侵植物与环境胁迫因子相互作用的认识。我们的研究结合已有文献报道表明:(i)入侵物种对环境胁迫的影响具有异质性,(ii)影响的大小是多变的,(iii)即使在同一影响类型内,影响类型也具有多向性。然而,入侵植物暴露在重金属环境中表现出更强的自我保护机制,对重金属的生物可利用性和毒性有正向或负向的影响。另一方面,由于入侵植物普遍具有较高的耐受性,加之本地植物暴露于有毒重金属污染时具有“逃逸行为”,重金属胁迫环境更有利于植物的成功入侵。但是,对于入侵植物的重金属等元素组成是否与污染地区的本地植物不同,目前尚无共识。因此,在全球范围内对外来入侵植物与本土植物的植物体内、凋落物和土壤污染物含量进行定量比较是今后研究的一个重要方向。 | Jian Li Zhanrui Leng Yueming Wu Yizhou Du Zhicong Dai Asim Biswas Xiaojun Zheng Guanlin Li Esawy Kasem Mahmoud Hui Jia Daolin Du | 2022 | Journal of Plant Ecology2022，15，3： | 1 |
| 2 | Warming and elevated nitrogen deposition accelerate the invasion process of Solidago canadensis L.显示文摘Background:Invasive species can threaten native diversity and alter ecosystem processes while interacting with other components of global environmental change.Invasive plants are becoming increasingly problematic and this can be stimulated by changes in the environment.However,existing studies have primarily investigated the effects of environmental change on a specific stage of plant invasion rather than the continuous invasion process.Methods:A space-for-time substitution experiment was performed to investigate how warming and nitrogen deposition affects the invasion process of a plant.Specifically,different ratios of invasive Solidago canadensis L.to native Artemisia argyi Levl.et Van were employed as a proxy to represent successive levels of invasion.A total of seven treatments were applied in the experiment:ambient(CK),N addition(+5,+12 g m^(−2)year^(−1)),warming(+1.15,+1.86℃)and their interaction(5 g N m^(−2)year^(−1)+1.15℃,12 g N m^(−2)year^(−1)+1.86℃).The growth performance and competitiveness of S.canadensis were investigated.Results:The competitiveness of Solidago canadensis decreased linearly with its invasion degree(p<0.05).Non-linear regression showed that S.canadensis invasion levels of 53%,53%,68%,55%and 58%were the critical thresholds for shifting the direction or magnitude of chlorophyll,leaf nitrogen,leaf shape index,diameter,and root/shoot ratio,respectively.Compared with the ambient treatment(CK,no warming and no N addition),the diameter,height,bio-mass and relative competitiveness of S.canadensis were each limited by warming,to a certain extent,whereas these and the above parameters were significantly increased by nitrogen deposition.The interaction of increased temperature and nitrogen deposition led to significant increases in the growth and competitiveness of S.canadensis,and this effect was detected in every stage of the invasion,throughout the invasion process.Conclusions:Environmental change might have a continuous,progressive,and augmentative effect on the phenotypic traits of S.canadensis.This study provides fairly robust evidence that environmental change promotes the invasion process of S.canadensis in general,not simply in specific stages.In the future,rather than focusing on specific stages,experimental studies should consider examining invasion on a broader scale. | Guangqian Ren Bin Yang Miaomiao Cui Zhicong Dai Yan Xiang Haiyan Zhang Guanlin Li Jian Li Qaiser Javed Daolin Du | 2022 | Ecological Processes2022，11，1： | 0 |
| 3 | Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands:From sediments,rhizosphere to vegetation显示文摘The interactions and mechanisms between sulfur and heavy metals are a growing focus of biogeochemical studies in coastal wetlands.These issues underline the fate of heavy metals bound in sediments or released into the system through sediments.Despite the fact that numerous published studies have suggested sulfur has a significant impact on the bioavailability of heavy metals accumulated in coastal wetlands,to date,no review article has systematically summarized those studies,particularly from the perspective of the three major components of wetland ecosystems(sediments,rhizosphere,and vegetation).The present review summarizes the studies published in the past four decades and highlights the major achievements in this field.Research and studies available thus far indicate that under anaerobic conditions,most of the potentially bioavailable heavy metals in coastal wetland sediments are fixed as precipitates,such as metal sulfides.However,fluctuations in physicochemical conditions may affect sulfur cycling,and hence,directly or indirectly lead to the conversion and migration of heavy metals.In the rhizosphere,root activities and microbes together affect the speciation and transformation of sulfur which in turn mediate the migration of heavy metals.As for plant tissues,tolerance to heavy metals is enhanced by sulfur-containing compounds via promoting a series of chelation and detoxification processes.Finally,to further understand the interactions between sulfur and heavy metals in coastal wetlands,some major future research directions are proposed. | Yueming Wu Zhanrui Leng Jian Li Chongling Yan Xinhong Wang Hui Jia Lingyun Chen Sai Zhang Xiaojun Zheng Daolin Du | 2022 | Frontiers of Environmental Science & Engineering2022，16，8： | 0 |
| 4 | Intrathecal co-administration of ketamine and morphine preventing activation of astrocytes and decreasing releases of IL-1β and IL-6 from spinal cord in rats of morphine tolerance显示文摘Objective: To investigate the effects of intrathecal administration of ketamine, a non-competitive N-methy-D-aspartate receptor antagonist, combined with morphine on the activation of astrocytes and releases of IL-1β and IL-6 from spinal cord in the rats of morphine tolerance. Methods: Twenty-seven Sprague-Dawley male rats were randomly divided into sham-operated, morphine tolerance, and morphine plus ketamine group. The subarachnoid catheterization of all the rats was prepared by the method of Jianping Yang. Morphine 20 μg in 10 μl was administrated intrathecally to induce spinal morphine tolerance once daily for 5 consecutive days. Morphine and ketamine 250 μg in 10 μl total volume was given in morphine plus ketamine group. Three groups all received intrathecal morphine 5 μg in 10 μl for morphine challenge test at 24 h after last administration of the morphine. After morphine challenge test, lumbar spinal tissues were taken for measurement of glial fibrillary acidic protein (GFAP) of astrocyte in lumbar spinal horn cord by immunohistochemistry and IL-1β and IL-6 of spinal cord by ELISA. Results: The decrease of %MPE induced by chronic intrathecal morphine was inhibited by ketamine and hyperalgesia and allodynia induced by morphine-withdrawl were alleviated. The average areas, the average absorbency ([AKA-]), the integral absorbency (A) of GFAP immuno-reactive cells in the dorsal horn, and IL-1β and IL-6 of spinal cord were significantly larger in morphine tolerance group than in morphine plus ketamine group. Conclusion: Co-administration of ketamine and morphine enhance antinociceptive effect of morphine and prevent the development of morphine tolerance. Ketamine might attenuate the activation of astrocytes and inhibit the release of IL-1β and IL-6 from spinal cord in repeated intrathecal morphine rats. | Daolin Jian Yuke Tian | 2005 | Journal of Nanjing Medical University2005，19，5： | 0 |
| 5 | Maternal organic selenium supplementation during gestation enhances muscle fiber area and muscle fiber maturation of offspring in porcine model显示文摘Background:Organic selenium supplementation during gestation improves the antioxidant status and reproduc-tive performance of sows and increases the antioxidative capacity of the intestines of their offspring.This study was conducted to investigate the effect of maternal basel diet(control)supplemented with an organic Se,2-hydroxy-4-methylselenobutanoic acid(HMSeBA),or inorganic sodium selenite(Na_(2)SeO_(3))during gestation on the antioxidant status and development of muscle in newborn and weaned piglets.Newborn piglets before colostrum intake and weaned piglets were selected for longissimus dorsi(LD)muscle collection and analysis.Results:The results showed that maternal HMSeBA supplementation increased the muscle area and content of Se in the LD muscle of newborn piglets,improved gene expression of selenoproteins,and decreased oxidative status in the LD muscle of both newborn and weaned piglets compared with the control.The expression of muscle development-related genes of newborn piglets in the HMSeBA group was lower than in the control group,whereas the expression of MRF4 in weaned piglets was higher in the HMSeBA group than in the control and Na_(2)SeO_(3)groups.In addition,HMSeBA supplementation decreased the mRNA expressions of myosin heavy chains(MyHC)IIx and MyHC IIb and the percentage of MyHC IIb;increased the expression of PGC-1αin the LD muscle of newborn piglets;increased the gene expression of MyHC IIa;and decreased the protein expression of slow MyHC and the activity of malate dehydrogenase in the LD muscle of weaned piglets compared with the control group.Conclusions:Maternal HMSeBA supplementation during gestation can improve the antioxidative capacity of the muscle of their offspring and promote the maturity of muscle fibres in weaned offspring. | Yan Lin Hui Yan Lei Cao Daolin Mou Dajiang Ding Binting Qin Lianqiang Che Zhengfeng Fang Shengyu Xu Yong Zhuo Jian Li Jianping Wang Chao Huang Yuanfeng Zou Lixia Li De Wu Bin Feng | 2023 | Journal of Animal Science and Biotechnology2023，14，2： | 0 |
| 6 | 基质有效性调节加拿大一枝黄花入侵对土壤呼吸的抑制作用显示文摘外来植物入侵不仅会降低河边近岸湿地生态系统植被多样性,而且会改变湿地生态系统的地下碳过程。外来入侵植物加拿大一枝黄花(Solidago canadensis L.)已广泛入侵我国东南部地区,但加拿大一枝黄花入侵对入侵地生态系统地下土壤碳循环过程的影响却知之甚少。本研究通过野外原位观测实验和温室模拟入侵实验,探究外来植物加拿大一枝黄花入侵对入侵地土壤呼吸的影响规律及其驱动因素。野外原位观测实验开展于2018年7月21日至12月15日,期间每周测定样地土壤呼吸。温室模拟入侵实验开展于2019年7月15日至12月15日,期间每月1日与15日上午测定土壤呼吸、自养呼吸和异养呼吸。土壤呼吸、自养呼吸和异养呼吸通过静态箱结合深埋根系隔离法测定。野外原位观测实验和温室模拟入侵实验结果均显示,加拿大一枝黄花的入侵降低了土壤二氧化碳的排放通量。加拿大一枝黄花入侵对土壤呼吸的抑制作用可能归因于其入侵引起的土壤可利用底物质量与数量的变化,表明外来入侵植物加拿大一枝黄花可通过改变植物释放基质以及与本地植物和/或土壤微生物争夺土壤有效基质而影响土壤碳循环。这些研究结果对于评估外来入侵植物对入侵地地下碳动态的影响以及对全球变暖的贡献具有重要意义。 | Zhiyuan Hu Jiaqi Zhang Yizhou Du Kangwei Shi Guangqian Ren Babar Iqbal Zhicong Dai Jian Li Guanlin Li Daolin Du | 2022 | Journal of Plant Ecology2022，15，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员