共查询到16条相似文献,搜索用时 90 毫秒
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[目的]研究火炭母的生药学特征。[方法]分别对火炭母药材进行性状鉴别和显微鉴别,然后采用紫外-可见分光光度法对火炭母进行生药鉴别研究。[结果]火炭母根横切面皮层狭窄,韧皮部成环;茎中柱鞘纤维波浪状排列成带状;叶主脉维管束2~6个排列成环,2侧均有木化纤维束;叶上表皮具类圆形分泌细胞与多细胞腺毛;下表皮具多细胞腺毛,不等式或不定式气孔多见;粉末中腺毛、分泌细胞、花粉粒、晶鞘纤维、棕色条块和淀粉粒各异;紫外-可见光谱在200~800 nm扫描,发现5种不同的提取液都有吸收峰。[结论]试验研究了火炭母生药学特征,为鉴定、开发利用和制定其质量标准提供参考依据。 相似文献
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[目的]研究苗药烟管头草的性状及显微特征。[方法]采用性状鉴别、显微鉴别的方法对烟管头草的组织特征进行观察。[结果]烟管头草主根不明显,侧根多分支;茎圆柱形,有明显纵条纹,密被白柔毛,断面外层表皮容易脱落,髓部为白色,质地松脆;叶互生,两面均被白色或淡黄色柔毛和腺点,多皱缩,易碎;花黄棕色。根横切面皮层宽广,近韧皮部有分泌腔断续排列成环;维管束外韧型,韧皮部与木质部间有断续成环的裂隙。茎表皮上有非腺毛及少量腺毛,皮层窄,外侧有2~3列厚角组织;维管束外韧型,约20~30束,韧皮部外侧有纤维束;髓部发达。叶上、下表皮均被腺毛和非腺毛,叶肉组织无栅栏组织和海绵组织之分,主脉上、下表皮内为数列厚角组织,维管束双韧型;气孔不定式。粉末呈黄绿色至灰绿色,导管多数,以螺纹、网纹为主,可见多数破碎的非腺毛。腺毛少见。以上描述可作为烟管头草药材性状鉴别的依据。[结论]烟管头草性状、显微特征稳定、可靠,可以作为其药材鉴定的参考依据。 相似文献
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[目的]分析不同光照条件下黑老虎的生长性状和叶片性状差异,为黑老虎作为园林植物的引种机理研究提供有效的参考依据.[方法]以1年生黑老虎幼苗为试材进行盆栽试验,分析100%光照、50%光照、30%光照、10%光照4种处理下生长性状和叶片性状指标的变化情况;采用单因素方差分析、相关性分析等方法进行统计分析.[结果]不同光照处理黑老虎的生长性状与叶片性状差异极显著,但变异性稳定(变异系数均小于10.00%),其中100%光照处理的叶宽变异系数最大,为7.56%.利用相关性分析进一步发现,地径、株高、叶长、叶宽均存在显著相关性,且这些性状与光照也存在显著正相关和负相关.[结论]光照对黑老虎生长的影响较大,30%~50%光照最适宜. 相似文献
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[目的]研究光叶海桐、狭叶海桐、海金子的生药学特征.[方法]采用药材性状和显微鉴定的方法对光叶海桐、狭叶海桐及海金子进行对比研究.[结果]山栀茶3个种在显微鉴别上存在相同点及明显差别.在组织鉴别上,光叶海桐主要含草酸钙簇晶,木纤维单个或数个相聚;狭叶海桐皮层含石细胞,木栓层与皮层分离不完全,偶见草酸钙方晶;海金子不合草酸钙簇晶,草酸钙方晶易见,呈单个散在,木质部与韧皮部相间排列.在粉末鉴别上,光叶海桐粉末木栓组织细胞较薄,木纤维呈梭形、较短,可见破碎的油室及黄色挥发油;狭叶海桐粉末可见螺纹与少数孔纹导管并列存在,木纤维较长,挥发油颜色为淡黄色;海金子粉末中偶见梯纹导管,木栓细胞排列较厚、颜色较深,挥发油颜色较深,并可见少量石细胞.[结论]该研究为山栀茶药材的鉴别和质量评价方法提供参考. 相似文献
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Molecular Identification and Cultivar Fingerprints of Prunus persica (L.) Batsch Germplasms 总被引:1,自引:0,他引:1
[Objective] The aim was to study the molecular identification and cultivar fingerprints of Prunus persica (L.) Batsch germplasms.[Method] Sixty peach genotypes,representing China common local cultivars and European samples were screened by microsatellites (simple sequence repeats,SSRs) and Inter-Simple Sequence Repeat (ISSR) markers.[Result] 26 reproducible bands were amplified by Nine SSR primers,and 24 of which were polymorphic; 236 bands were amplified by 30 ISSR primers,and 113 of which were polymorphic.31 genotypes were discriminated with 1-3 distinct polymorphic bands generated from the primers ISSR and SSR.Seven cultivar-specific ISSR fragments and two SSR unique alleles obtained from this study were available to be converted into Sequence Characterized Amplified Region (SCAR) markers.The genetic similarity coefficient (GS) estimated from these molecular data averaged were 0.939 (ranged from 0.856 to 0.983) for ISSR and 0.646 (ranged from 0.240 to 1.000) for SSR,respectively.The combined grouping association indicated that most local Chinese peach cultivars and exotic accessions were clustered together.This could be related to the mode of introduction and maintenance of the peach cultivars involving limited foundation germplasm,exchange of cultivars between plantations,and periodic development of new recombinant cultivars following sexual reproduction.[Conclusion] The results obtained in this work would help to improve the conservation,molecular identification and management of peach germplasm in breeding. 相似文献
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[摘要〕目的研究昆明滇紫草的生药鉴定特征〔方法应用来源、性状、显微及理化鉴别方法〔结果昆明滇紫
草为紫草科滇紫草属植物昆明滇紫草的干燥根,详细描述了其生药鉴别特征;薄层鉴别表明昆明滇紫草含有日,日‘
一二甲基丙烯酞阿卡宁和乙酞紫草素、结论研究结果为该药的鉴别、开发利用及质量标准的制订提供了实验依据、 相似文献
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Isolation and Structural Identification of Herbicidal Active Substance from Root of Flaveria bident (L.) Kuntze 下载免费PDF全文
In order to understand the composition and structure of herbicidal active substance from the root of Flaveria bidentis (L.) Kuntze, the isolation and structural identification were researched in this paper. The crude extract from the root ofF. bidentis (L.) Kuntze was extracted by petroleum ether, ethyl acetate, and water saturation of n-butyl alcohol, respectively, and the extraction fluid was separated by using the method of TLC, then the main fraction was separated by HPLC, and the structure of the herbicidal active substance was analyzed by LC-MS, elemental analysis and ~H-NMR. The results showed that the petroleum extraction had the strongest herbicidal activity, and the purple blue stripe separated by TLC had the strongest effect on Digitaria sanguinalis. The herbicidal active substance was identified as ct-terthienyl according to the data of LC-MS, elemental analysis and 1H-NMR. 相似文献