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Five New Flavonoids from Bidens Pilosa L. Var. Vadiata SCH.-BIP

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Chinese Chemical Letters 1997年第7期8卷 599-602页

作者： Wang, J Yang, H Lin, ZW Sun, HD ACAD SInica KUNMING INST BOTLAB PHYTOCHEMKUNMING 650204PEOPLES R CHINA YUNNAN UNIV DEPT CHEMKUNMING 650091PEOPLES R CHINA

Five new flavonoids were isolated from the aerial parts of Bidens pilosa L. var. vadiata Sch.-Bip.. Their structures were established on the basis of spectroscopic methods.

关键词： Vadiata SCH OAC BIP Five New Flavonoids from Bidens Pilosa L Var

TWO NORDITERPENOID ALKALOIDS FROM ACONITUM LEUCOSTOMUM

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Chinese Chemical Letters 1996年第8期7卷 725-728页

作者： Yue, JM Xu, J Sun, HD Chen, SN Chen, YZ ACAD SInica KUNMING INST BOTLAB PHYTOCHEMKUNMING 650204PEOPLES R CHINA LANZHOU UNIV DEPT CHEMLANZHOU 730000PEOPLES R CHINA

Two new norditerpenoid alkaloids leucostines A (1) and B (2) have been isolated from the soot of Aconitum leucostomum. Their structures were elucidated on the basis of spectral data and chemical evidence.

关键词： DITERPENOID ALKALOIDS DELPHINIUM

A new ent-kaurane diterpenoid from Isodon japonica

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Chinese Chemical Letters 2010年第2期21卷 200-202页

作者： Di, Xue Mei Yan, Fu Lin Feng, Chuang Xie, Rui Jie Hou, Rui Jie Sun, Han Dong Xinxiang Med Univ Coll Pharm Xinxiang 453003 Peoples R China Chinese Acad Sci Kunming Inst Bot Kunming 650204 Peoples R China

One new ent-kaurane diterpenoid, named maoyecrystal L was isolated from the EtOAc extract of the dried leaves of Isodon japonica . Its structure was established by various spectroscopic means and confirmed by X-ray cr... 详细信息

关键词： Labiatae Isodon japonica Ent-kaurane diterpenoid Maoyecrystal L

FOUR NEW GLYCOSIDES, LIGUROBUSTOSIDES A, B, C AND D FROM LIGUSTRUM ROBUSTUM

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Chinese Chemical Letters 1996年第4期7卷 341-344页

作者： Tian, J Zhang, HJ Sun, HD Pan, LT Yao, P Chen, DY ACAD SInica KUNMING INST BOTLAB PHYTOCHEMKUNMING 650204PEOPLES R CHINA GUIZHOU INST TRADIT CHINESE MED GUIYANG 550002PEOPLES R CHINA

Four new glycosides named ligurobustosides A, B, C and D have been isolated from Ligustrum robustum and their structures identified as geraniol 3-O-alpha-L-rhamnopyranosyl-beta-D-glucopyranoside (1), geraniol-O-alpha-L-rhamnopyranosyl-4-cafferoyl-beta-D- glucopyranoside (2), geraniol 3-O-alpha-L-rhamnopyranosyl-4-trans-P-coumaroyl -beta-D-glucopyranoside (3) and geraniol 3-O-alpha-L-rhamnopyranosyl-4-cis P-coumaroyl-beta-D-glucopyranoside (4), respectively.

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Effects of ultradry storage on fluidity of plasma membrane of seed

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Chinese Science Bulletin 1999年第11期44卷 1008-1014页

作者： Xiaofeng Wang Guanghua Zheng Shijie Yang Xinming Jing Chinese Agr Univ Coll Biol Sci Beijing 100094 Peoples R China Chinese Acad Sci Inst Bot Beijing 100093 Peoples R China

The effects of ultradry seed storage on the fluidity of plasma membrane have been investigated using the DPH fluorescent probe (1,6-diphenyi-1, 3, 5,-hexatriene). The results demonstrated that the micro-viscosity of plasma membrane of ultradried seeds has no significant changes compared with the seeds which were stored under -20℃ condition. However, there is a little adverse effect on the seeds with extreme dehydration. The results were consistent with higher vigor level of ultradried seed. It indicated that ultradry seed storage could maintain the physiological function of seed, protect the integrity of the membrane and improve the storability of seed. Furthermore, the results also revealed that sugar has the effect on protecting membrane structure and preserving the fluidity of the plasma membrane under seed dehydration. In the meantime, some mechanism about ultradry seed storage and the tolerance of dehydration of seed have been discussed.

关键词： ultradry storage fluorescent probe fluidity of plasma membrane Brassica chinensis Ulmus pumila.

Vegetation structure and edaphic factors in veredas reflect different conservation status in these threatened areas

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Forest Ecosystems 2022年第3期9卷 387-395页

作者： Yule Roberta Ferreira Nunes Camila Silveira Souza Islaine Francielly Pinheiro de Azevedo Odirlei Simôes de Oliveira Leidivan Almeida Frazão Rúbia Santos Fonseca Rubens Manoel dos Santos Walter Viana Neves Programa de Pós-Graduaçao Em botânica Aplicada Departamento de Biologia GeralUniversidade Estadual de Montes ClarosAvenida Dr.Ruy BragaS/N-Bairro Vila MauricéiaMontes ClarosMinas Gerais39401-089Brazil Laboratório de Ecologia Vegetal Universidade Estadual de Montes ClarosAvenida Dr.Ruy BragaS/N-Bairro Vila MauricéiaMontes ClarosMinas Gerais39401-089Brazil Instituto de Ciências Agrarias-Universidade Federal de Minas Gerais Avenida Universitária1.000-Bairro Universit�arioMontes ClarosMinas Gerais39404-547Brazil Departamento de Ciências Florestais Universidade Federal de LavrasCP 3037LavrasMinas Gerais37200-000Brazil Instituto Mineiro de Gestao dasÁguas Secretaria de Estado de Meio Ambiente e Desenvolvimento SustentávelAvenida JoséCorreia Machado900-Bairro IbiturunaMontes ClarosMinas Gerais39401-832Brazil

Background:In Cerrado humid areas,veredas are considered as hygrophilous communities,marked by the presence of the Mauritia flexuosa palm tree emerging in the wetter *** in veredas ecosystems due to drought and changes in the water table,which represent important areas for biodiversity maintenance in the Brazilian cerrado,can lead to the emergence of new landscapes and *** that the veredas are changed in species composition due to anthropogenic factors,in this study,we evaluated the flora composition and described the current vegetation profile of two veredas under different disturbances levels that are located in the north of Minas Gerais State,***:Altogether,2,268 individuals of 91 species belonging to 36 families were *** results demonstrated that the studied veredas were floristically different in terms of the arboreous-shrubby species composition,richness,and *** the hygrophilous forest formations and open areas in the two veredas present typical species from these environments(same species with high importance values),the drought in the water table caused an expansion of Cerrado species in the open areas and in the hygrophilous ***,in the hygrophilous forest there was an increase in the abundance of species that occur in less saturated ***:Our results demonstrate that the studied veredas are changing in species composition due to anthropogenic factors which leads to the drought of these formations(water balance effect).These anthropogenic effects cause a modification with the expansion and increase in the abundance of typical species of other areas of Cerrado and resistant to less saturated soils,leading to the veredas ***,future studies should investigate other veredas on a broader scale to detect changes in the water table that lead to a consequent change in vegetation *** this way,we will have support for the conscientious management and conservatio

关键词： Cerrado Conservation Palm swamp Plant distribution Climate change Water balance effect Vereda drought Phytosociological analysis

Four New Compounds from Isodon Eriocalyx

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Chinese Chemical Letters 1997年第7期8卷 603-606页

作者： Wang, J Lin, ZW Shingu, T Sun, HD ACAD SInica KUNMING INST BOTLAB PHYTOCHEMKUNMING 650204PEOPLES R CHINA KOBE GAKUIN UNIV FAC PHARMACEUT SCINISHI KUKOBEHYOGO 65121JAPAN

Four new diterpenoids named maoecrystal Q-T (1-4) were isolated from the dried leaves of Isodon eriocalyx. Their sturctures were established by spectroscopic methods.

关键词： Four New Compounds from Isodon Eriocalyx OCH

Two new diterpenoids from Isodon eriocalyx

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Chinese Chemical Letters 1999年第1期10卷 31-32页

作者： Chen, NY Tian, MQ Wu, R Sun, HD Li, CM Lin, ZW Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China Acad Sinica Kunming Inst Bot Lab Phytochem Kunming 650204 Peoples R China

Two new diterpenoids, maoecrystal U and epi-maoecrystal P were isolated from the leaves of Isodon eriocalyx. Their structures were determined as 6 beta-acetoxy-15 beta-hydroxy-3 alpha, 20epoxy-ent-kaur-16-ene-1,7-dione 1 and 16 (s)-methoxymethyl-6 beta,7 beta-dihydroxy-7 alpha,20-epoxy-ent-kaur-2,3-ethenylene-1, 15-dione 2 respectively, by spectroscopic methods.

关键词： Isodon eriocalyx ent-kaurenoids maoecrystal U epi-maoecrystal P

Eucaglobulin, A New Complex of Gallotannin and Monoterpene from Eucalyptus globulus

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Chinese Chemical Letters 1998年第6期9卷 541-543页

作者： Hou, AJ Liu, YZ Lin, ZW Sun, HD Acad Sinica Kunming Inst Bot Lab Phytochem Kunming 650204 Peoples R China Henan Coll Tradit Chinese Med Phytochem Dept Zhengzhou 450003 Peoples R China

Eucaglobulin 1, a new complex of gallotannin and monoterpene, was isolated from the leaves of Eucalyptus globulus. Its structure was determined by spectral methods.

关键词： Eucalyptus globulus Myrtaceae gallotannin-monoterpene complex eucaglobulin