共查询到20条相似文献,搜索用时 109 毫秒
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麻栗坡假卫矛 新种 (聚伞圆锥组 )MicrotropismalipoensisY .M .Shui&W .H .Chen ,sp .nov . [Sect.Cymoso paniculata (Merr.etFreem .)C .Y .ChengetT .C .Kao]SpeciesMicrotropisscotiiParkinsarcteaffinis ,sedfoliis 19- 2 4cmlongis ,cymisquartervelquinquiesramosis ,sepalisinvolutis (necrevolutis)dif… 相似文献
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报道了卫矛属(Euonymus)一新变种——腥臭卫矛(Euonymus sanguineus var.paedidus L.M.Wang)。该新变种与原变种石枣子(Euonymus sanguineus Loes.var.sanguineus)相似,但其独特的强烈腥臭花不仅明显可与石枣子区别,而且也有别于卫矛属中所有其他种类。另外,该变种叶柄极短,一般短于5mm,可以与原变种区别。对腥臭卫矛的分布与生境做了简略讨论。 相似文献
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卫矛科新植物 总被引:1,自引:0,他引:1
狭叶卫矛;新种EuonymusstenophyllusJ.W.Rensp.nov.SpeciesaffinisEuonymuslinearifoliusFranch.,sedfoliis1~3.5cmlongi,0.1~0.3cmlati;inflores-centiacymosasemelfurceta;pedunculis0.8~2.0cmlongi;style;florespurpureusdiffert.Fruex,ad40~100cmaltus;ramulioppositi,juniorsviridulus,leviter4angualati,vetustioresflavovirens,sulcatus;gemmaeconicae,0.1cmlongae.Foliaopposita,membranacea,linearesvellanceolata,1~3.5cmlonga,0.1~0.3cmlata,apiceacuta,marginedispersacrenata,utraquepaginaglabra,costavisibilsreti… 相似文献
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报道了中国广东省阳西县沟谷雨林内1新变种——阳西静容卫矛(Euonymus chengii var.yangxiensis Y.S.Ye&L.F.Wu),并提供简要描述和照片。阳西静容卫矛隶属于卫矛科(Celastraceae)浅裂卫矛组(Euonymus),蒴果顶端浅裂,与原变种静容卫矛(E.chengii J.S.Ma)和中华卫矛(E.nitidus Benth.)相似,主要区别是该变种叶缘顶部2/3以上具锯齿,侧脉明显,花少且大,蒴果大,萼片伸展。 相似文献
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卫矛科Celastraceae植物上已报道尾孢类真菌10种,其中包括假尾孢属Pseudocercospora真菌7种。在对中国尾孢类真菌的调查研究中,采集到寄生在冬青卫矛Euonymus japonicus上的3种假尾孢菌,其中2个为新种,即冬青卫矛假尾孢Pseudocercospora euonymi-japonici和北京假尾孢P. beijingensis。本文对这2个新种和Pseudocercospora cf. destructiva提供了形态描述、图及与近似种区别的讨论。采用ITS、tef1-α、act和rpb2 4个片段的序列构建了系统发育树。 相似文献
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为探究卫矛科卫矛属植物星刺卫矛(Euonymus actinocarpus)的化学成分,该文采用正相硅胶、Sephadex LH-20和半制备液相HPLC等色谱技术对其进行分离和纯化。结果表明:(1)从星刺卫矛地上部分95%乙醇提取物中分离得到10个化合物,根据其理化常数和波谱(ESI-MS、1H-NMR、13C-NMR)数据鉴定化合物结构为羽扇豆醇(1),蒲公英萜醇(2),表木栓醇(3),槐二醇(4),蒲公英萜酮(5),高粱醇(6),羽扇豆醇乙酸酯(7),木栓酮(8),β-谷甾醇(9),胡萝卜苷(10)。(2)所有化合物均为首次从星刺卫矛中分离得到。(3)星刺卫矛地上部分主要含有三萜和甾体类成分,其中三萜类型以木栓烷型、齐墩果烷型和羽扇豆烷型骨架为主。该研究结果增加了对星刺卫矛物质基础的认识,为开发和利用卫矛属植物资源提供了一定的科学依据。 相似文献
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Peter J. King Peter S. Widdowson Henri N. Doods Gareth Williams 《Journal of neurochemistry》1999,73(2):641-646
Neuropeptide Y (NPY) is an important regulator of energy balance in mammals through its orexigenic, antithermogenic, and insulin secretagogue actions. We investigated the regulation of endogenous NPY release from rat hypothalamic slices by NPY receptor ligands and calcium channel antagonists. High-potassium stimulation (60 mM) of the slices produced a calcium-dependent threefold increase in NPY release above basal release. The Y2 receptor agonists NPY(13-36) and N-acetyl[Leu28,Leu31]NPY(24-36), the Y4 agonist rat pancreatic polypeptide (rPP), and the Y4/Y5 agonist human pancreatic polypeptide (hPP) significantly reduced both basal and stimulated NPY release. NPY(13-36)-induced reduction of NPY release could be partially prevented in the presence of the weak Y2 antagonist T4-[NPY(33-36)]4, whereas the hPP- and rPP-induced inhibition of release was not affected by the Y5 antagonist CGP71683A or the Y1 antagonist BIBP3226. The selective Y1, Y2, and Y5 antagonists had no effect on either basal or potassium-stimulated release when administered alone. The calcium channel inhibitors omega-conotoxin GVIA (N-type), omega-agatoxin TK (P/Q-type), and omega-conotoxin MVIIC (Q-type) all significantly inhibited potassium-stimulated NPY release, without any effect on basal release, whereas nifedipine had no effect on either basal or stimulated release. Addition of both omega-conotoxin GVIA and omega-agatoxin TK together completely inhibited the potassium-stimulated release. In conclusion, we have demonstrated that NPY release from hypothalamic slices is calcium-dependent, involving N-, P-, and Q-type calcium channels. NPY release is also inhibited by Y2 agonists and rPP/hPP, suggesting that Y2 and Y4 receptors may act as autoreceptors on NPY-containing nerve terminals. 相似文献
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发表了黑龙江省东南部产冷杉属一新变种,即粗皮沙松(Abies holophylla Maxim. var. aspericorticea Y. Y. Sun)。 相似文献
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Stachyurus himalaicus ssp. purpureus Y. P. Zhu&Z. Y. Zhang,a new subspecies of Stachyuraceae from eastern Himalaya,is described. It differs from the typical subspecies,S. hi-malaicus ssp. himalaicus,by having purplish pink to dark purple flowers. The new subspecies oc-curs in Xizang(Tibet)of China,E Nepal,Sikkim,Bhutan,and NE India,usually growing in dense forests at an altitude between2200and3300m. 相似文献
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WEI Yi-Gang 《植物分类学报:英文版》2004,42(6):528-532
Paralagarosolen fangianum Y. G. Wei, a new genus and species of Gesneriaceae from Guangxi, China, is described and illustrated. Paralagarosolen Y. G. Wei is closely related to Lagarosolen W. T. Wang in having corolla tube cylindric, not swollen, and stigmas 2, but differs by having leaves sometimes peltate at base, cyme with only one flower, corolla lobes rounded-obtuse at apex, and capsule broadly ovoid-ellipsoid. 相似文献
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由于卢氏凤仙花Impatiens lushiensis Y.L.Chen[=Impatiens heterosepala S.Y.Wang(1988)non J.D.Hook.(1924)]的主模式和副模式全部遗失,在此指定了卢氏凤仙花的新模式。 相似文献
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