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Distribution and variability of n-alkanes in waxes of conifers

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Journal of Forestry Research 2019年第2期30卷 429-433页

作者： Mohamad Hassanzadeh-Khayyat Maryam Akaberi Hamideh Moalemzadeh Haghighi Amirhossein Sahebkar Seyed Ahmad Emami Pharmaceutical Research Centre Department of Medicinal Chemistry School of Pharmacy Mashhad University of Medical Sciences Student Research Committee Department of Pharmacognosy School of Pharmacy Mashhad University of Medical Sciences Biotechnology Research Center Pharmaceutical Technology Institute Mashhad University of Medical Sciences Neurogenic Inflammation Research Center Mashhad University of Medical Sciences School of Pharmacy Mashhad University of Medical Sciences Department of Pharmacognosy School of PharmacyMashhad University of Medical Sciences

Epicuticular waxes have vital roles in the growth and development of plants and in defense. Conifers have a considerable amount of waxes on their cones and leaves.Here we characterized the n-alkane composition of Iranian conifers, including Juniperus oblonga, J. foetidissima, J.sabina, J. communis subsp. hemisphaerica, J. excelsa,Cupressus sempervirens, Platycladus orientalis from Cupressaceae and Taxus baccata from taxaceae for the first time using GC-FID analyses. In the waxes, 25 n-alkane homologs with chain lengths ranging from C7 to C32 were identified. Short-chain n-alkanes were dominant in almost all samples with some exceptions. Complementary studies to elucidate complete wax constituents of Iranian conifers and n-alkane distribution pattern as a function of geographical and bioclimatic variables are recommended.

关键词： Gymnosperms Iranian conifers Epicuticular waxes Cupressaceae taxaceae

A New Abeotaxane Diterpenoid from the Seeds of Taxus mairei

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Chinese Chemical Letters 2006年第1期17卷 27-30页

作者： Man Li ZHANG Li Geng LI Cong Mei CAO Zuo Ping LI Qing Wen SHI Hiromasa KIYOTA Department of Natural Product Chemistry School of Pharmaceutical Sciences Hebei Medical University Shijiazhuang 050017 Laboratory of Applied Bioorganic Chemistry Graduate School of Agricultural Science Tohoku University Sendal 981-8555 Japan

A new abeotaxane was isolated from the seeds of Taxus mairei. Its structure was determined to be 2α, 5α, 13α-trihydroxy-7β, 10β-diacetoxy-2（3→20） abeotaxa-4（20）, 11-dien-9- one on the basis of 1D and 2D spec... 详细信息

关键词： taxaceae Taxus mairei taxane seeds.

Two New Taxoids from Taxus Yunnanensis

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Chinese Chemical Letters 1998年第11期9卷 0-0,0-0页

作者： Sheng Hong LI Hong Jie ZHANG Ping YAO Han Dong SUN (Phytochemistry Laboratory, Kunming Institute of Botany, Academia Sinica, Heilongtan, Kunming 650204)(Guizhou Institute of Traditional Chinese Medicine, Guiyang 550002) Phytochemistry Laboratory Kunming Institute of Botany Academia Sinica Heilongtan Kunming 650204 China Guizhou Inst. Traditional Chinese M. Guiyang 550002 China

Two new baccatin Ⅲ type taxoids, 13-Cinnamoylbaccatin Ⅲ (1) and 7-xylosylbaccatin Ⅲ(2), have been isolated from the barks of Taxus yunnanensis. The structures were elucidated by spectral means.

关键词： Taxus yunnanensis taxaceae taxane diterpenoids, 13-cinnamoylbaccatin Ⅲ 7-xylosylbaccatin Ⅲ baccatin Ⅲ

A New Abietane Diterpenoid from the Barks of Taxus yunnanensis

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Chinese Chemical Letters 2001年第5期12卷 429-430页

作者： Sheng Hong LI Hong Jie ZHANG Ping YAO Han Dong SUN Phytochemistry Laboratory Kunming Institute of BotanyAcademia SinicaKunming 650204 Guizhou Institute of Traditional Chinese Medicine Guiyang 550002

The structure of a new abietane diterpenoid, taxayunnin (1), from the barks of Taxus yunnanensis, was determined by spectroscopic analysis. A known abietane diterpenoid, taxamairin C (2), was also isolated.

关键词： Taxus yunnanensis taxaceae abietane diterpenoid Taxayunnin.

Chemical Constituents of New Diterpenes From Taxus yunnanensis

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Chinese Science Bulletin 1993年第13期38卷 1129-1132页

作者：刘锡葵吴大刚王宗玉 Kunming Institute of Botany Academia Sinica Kunming 650204 PRC

Recently, the intensive investigations of chemical constituents of Taxaceac, especially the antitumor diterpenes related to taxane, have already been stimulated by the significant discovery of antitumor activity of ta... 详细信息

关键词： taxaceae Taxus yunnanensis. diterpene taxayunnansin A.B taxol.

Phytoecdysteroids from the needles of Taxus canadensis

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Phytoecdysteroids from the needles of Taxus canadensis

第十届全国中药和天然药物学术研讨会

作者： Francoise Sauriol Department of Chemistry Queen’s niversity KingstonOntarioCanada

＜正＞Two new phytoecdysteroids with 20,22-acetal group were identified for the first time from the needles of the Canadian yew,Taxus canadensis.Their structures were characterized as ponasterone 20,22-p-hydroxybenzylidene acetal（1） and ponasterone 20,22-acetonide（2） on the basis of 1D-,2D-NMR evidence and high-resolution FABMS analysis.

关键词： Taxus canadensis taxaceae Ponasterone 20,22-p-hydroxybenzylidene acetal Ponasterone 20,22-acetonide

Two New Taxanes from Taxus cuspidata Needles and T.canadensis Rooted Cuttings

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Two New Taxanes from Taxus cuspidata Needles and T.canadensi...

第九届全国中药和天然药物学术研讨会

作者： Sa Lv~1 Shiping Chen~1 Changhong Huo~2 Yongmin Zhao~3 Qingwen Shi~(2*) Yucheng Gu~4 1.Depatment of Environmental Biochemistry Graduate School of Medicine,Chiba University,1-8-1,Inohana,Chuo-ku,Chiba 260-8670,Japan 2.Department of Natural Product Chemistry,School of Pharmaceutical Sciences,Hebei Medical University,361 Zhongshan East Road,050017,Shijiazhuang,Hebei Province,P.R.China 3.School of Basic Medical Science,Hebei North University,zhangjiakou 075000,China 4.Jealott''s Hill International Research Centre,Syngenta,Berkshire,RG42 6EY,UK

＜正＞A novel metabolite with an unprecedented hemiketal ring between C-13 and C-9 and a taxane with an amino-side chain on C-5 were isolated from the needles of Taxus cuspidata and rooted cuttings of Taxus canadensis,respectively.The structure,s were characterized as 2,10-diacetoxy-5-cinnamoyloxy-11.1-dihydroxy-9,13-epoxide-taxa-4（20）-ene（1）and 7,9 ,10.1-tetraacetoxy-5-[3’-（N-formyl-N-methylamino）-3’-phenylpropanoyl]oxytaxa-4（20）,12-diene（2）on the basis of 1D-, 2D-NMR data analysis.The spectra of 2 in CDCh solution revealed that 2 was composed of two epimers（2 and 3）in a ratio of 2:1 approximately.

关键词： Taxus cuspidata Taxus canadensis taxaceae needles rooted cutting taxane isolation

Prevalence of isomeric plastomes and effectiveness of plastome super-barcodes in yews（Taxus） worldwide

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Prevalence of isomeric plastomes and effectiveness of plasto...

中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Chaonan Fu Chungshien Wu Linjiang Ye Zhiqiong Mo Jie Liu Yuwen Chang Dezhu Li Shumiaw Chaw Lianming Gao Key Laboratory for Plant Diversity and Biogeography of east Asia Kunming Institute of BotanyChinese Academy of Sciences Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of Sciences Kunming College of Life Science University of Chinese Academy of Sciences Biodiversity Research Center Academia Sinica

Taxus（yew） is both a most species-rich and taxonomically difficult genus in taxaceae.To date,no study has elucidated the complexities of the plastid genome（plastome） or examined the possibility of whole plastomes as super-barcodes across yew species worldwide.In this study,we sequenced plastomes from two to three individuals for each of the 16 recognized yew species（including three potential cryptics） and Pseudotaxus chienii.Our comparative analyses uncovered several gene loss events that independently occurred in yews,resulting in a lower plastid gene number than other Taxaceous genera.In Pseudotaxus and Taxus,we found two isomeric arrangements that differ by the orientation of a 35 kb fragment flanked by "trnQ-IRs".These two arrangements exist in different ratios within each sampled individual,and intraspecific shifts in major isomeric arrangements are first reported here in Taxus.Moreover,we demonstrate that entire plastomes can be used to successfully discriminate all Taxus species with 100% support,suggesting that they are useful as super-barcodes for species identification.We also propose that accD and rrn16-rrn23 are promising special barcodes to discriminate yew species.Our newly developed Taxus plastomic sequences provide a resource for super-barcodes and conservation genetics of several endangered yews and serve as comprehensive data to improve models of plastome complexity in taxaceae as a whole and authenticate Taxus species.

关键词： taxaceae plastome complexity isomeric arrangement super-barcode species discrimination

A Novel Taxane with An Unprecedented Skeleton from Taxus cuspidata Needles

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A Novel Taxane with An Unprecedented Skeleton from Taxus cus...

第九届全国中药和天然药物学术研讨会

作者： Shiping Chen~1 Sa Lv~1 Zuoping Li~2 Changhong Huo~2 Yongmin Zhao~3 Qingwen Shi~(2*) Yucheng Gu~4 1.Depatment of Environmental Biochemistry Graduate School of Medicine,Chiba University,1-8-1,Inohana,Chuo-ku,Chiba 260-8670,Japan 2.Department of Natural Product Chemistry,School of Pharmaceutical Sciences,Hebei Medical University,361 Zhongshan East Road,050017,Shijiazhuang,Hebei Province,P.R.China 3.School of Basic Medical Science,Hebei North University,zhangjiakou 075000,China 4.Jealott''s Hill International Research Centre,Syngenta,Berkshire,RG42 6EY,UK

＜正＞A novel metabolite with an unprecedented skeleton was isolated from the needles of Taxus cuspidata.The structure was characterized as 2,7,9,10-tetraacetoxy-5,12-dihydroxy-11,12-secotaxa-4（20）-en-11, 13-dione（... 详细信息

关键词： Taxus cuspidata taxaceae needles isolation