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| 1 | Changes in soil microbial community and enzyme activity along an exotic plant Eupatorium adenophorum invasion in a Chinese secondary forest显示文摘The exotic plant,Eupatorium adenophorum,has invaded rapidly across southwest China,damaging native ecosystems and causing great economic losses.Soil microbes,as an important component of belowground community,can drive nutrient cycling and regulate plant competition in terrestrial ecosystems.Therefore,knowledge of the soil microbial community and function will enhance our understanding of the mechanism of exotic plant invasive process in natural ecosystems.In this study,we examined the soil microbial community,soil enzyme activity,soil property and plant community along an invasive gradient of E.adenophorum in a southwest Chinese secondary forest.The soil analysis demonstrated that heavy invasion significantly increased the total P and NO3–-N contents,whereas it significantly decreased the total N and soil organic matter contents.The available P content was significantly decreased by moderate invasion.The E.adenophorum invasion significantly decreased the biomass of total soil microbes,as well as Gram-negative bacteria,actinomycetes,arbuscular mycorrhizal(AM)fungi and non-AM fungi.However,E.adenophorum invasion significantly increased the activities of soil urease,acid phosphatase,polyphenol oxidase and peroxidase.Non-metric multidimensional scaling showed that soil microbial composition and soil enzyme composition were significantly different in the three E.adenophorum invaded sites.Partial Mantel tests indicated that plant composition was the most important factor for structuring soil microbial and enzyme compositions.The results suggest that changes in soil microbial community structure and enzyme activity may play an important role in the process of E.adenophorum invasion in a Chinese secondary forest ecosystem. | SUN Xin GAO Cheng GUO LiangDong | 2013 | Chinese Science Bulletin2013，58，33： | 15 |
| 2 | Dimericbiscognienynes B and C: New diisoprenyl-cyclohexene-type meroterpenoid dimers from Biscogniauxia sp.显示文摘Dimericbiscognienynes B and C(1 and 2), two new diisoprenyl-cyclohexene-type meroterpenoid dimers,were isolated from Biscogniauxia sp. 71-10-1-1. Their structures, including the absolute configurations,were determined by spectroscopic analyses and ECD experiments. Meroterpenoids are special natural products that originate from mixed terpenoid-nonterpenoid pathway. As a member of meroterpenoid family, diisoprenyl-cyclohexene/ane-type meroterpenoids composed of two isoprenyl chains(C5 unit)and a cyclohexene/ane moiety(C6 unit), featuring diverse skeleton structures with wide range of bioactivities. In these reported diisoprenyl-cyclohexene/ane-type meroterpenoids, only three dimers were identified. The discovery of the two new dimers added members of this rare class of meroterpenoids. | Huan Zhao Meizhi Wang Guodong Chen Dan Hu Enqing Li Yibo Qu Libing Zhou Liangdong Guo Xinsheng Yao Hao Gao | 2019 | Chinese Chemical Letters2019，30，1： | 3 |
| 3 | Make an Inventory of China's Biodiversity显示文摘The Convention on Biological Diversity, which entered into force in 1993, establishes three main goals: the conservation of biodiversity, the sustainable use of its components, and the fair and equitable sharing of the benefits from the use of genetic resources. However, the achievement of these objectives depends primarily on background knowledge of these components, including the names, morphological descriptions, origins, and environment and ecological settings of various species. In China, scientists have made enormous efforts at sharpening the understanding in this regard by identifying and cataloguing the species into monographs and databases. The following is a brief introduction to several examples of such magnificent efforts in this country. | Tao Ye and Huang Dawei from the CAS Institute of Zoology Jin Xiaohua,the CAS Institute of Botany GUO Liangdong,Key Laboratory of Systematic Mycology & Lichenology,Institute of Microbiology,CAS, Beijing 100101 Jin Xiaohua,the CAS Institute of Botany,Beijing | 2010 | Bulletin of the Chinese Academy of Sciences2010，24，4： | 1 |
| 4 | Tripodalsporormielones A-C,unprecedented cage-like polyketides with complex polyvdent bridged and fused ring systems显示文摘A chemical investigation on Sporormiella sp.led to the isolation and structural elucidation of tripodalsporormielones Ae C(1-3),a new class of polyketide possessing unprecedented cage-like skeletons with polyvdent bridged and fused ring systems.These polyketides with cage-like skeletons were characterized as a high non-protonated carbon-containing system,which resulted in few HMBC correlations observed and made the accurate structures hard to be obtained by NMR.Especially,some signals of non-protonated sp;carbons are weak and even unobservable in compound 1.In order to establish the structure of 1,the calculated NMR with DP4 evaluation was applied to determine the structure from the plausible structure candidates obtained from the detailed NMR analysis.Based on NMR experiments and calculated NMR,the structures of isolated compounds were established and confirmed by X-ray technology.Through chiral isolation,the optically pure enantiomers of 1 and 3 were obtained,and their absolute configurations were determined based on ECD quantum chemical calculation.Based on the isolated compounds and our previous work,1-3 would be derived from 3-methylorcinaldehyde,and their plausible biosynthetic mechanism was proposed.Furthermore,1 exhibited obvious short-term memory improvement activity on an Alzheimer’s disease fly model. | Guodong Chen Bingxin Zhao Meijuan Huang Jia Tang Yanbing Li Liangdong Guo Rongrong He Dan Hu Xinsheng Yao Hao Gao | 2021 | Acta Pharmaceutica Sinica B2021，11，11： | 1 |
| 5 | Asymptotic and exponential of uncertain system with interval delay显示文摘 | Guo Liangdong Gu Hong Xing Jun | 2012 | Applied Mathematics and Computation2012，218，10： | 1 |
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