中药凤尾草的研究进展   总被引：3，自引：0，他引：3  

孙海燕  薛飞群  张可煜  费陈忠 《中国兽医寄生虫病》2007,15(3):42-46

凤尾草是一种传统的药用植物,具有很高的药用价值,应用前景广阔。本文综述了凤尾草的鉴定、临床应用、药理作用和化学成分的研究概况,为中药凤尾草资源开发与合理利用提供依据。  相似文献   

砷污染土壤的蜈蚣草修复研究进展   总被引：5，自引：1，他引：4  

潘志明  邓天龙 《土壤》2007,39(3):341-346

本文评述了As污染土壤的蜈蚣草植物修复及其对As的解毒机制的研究进展,内容着重包括蜈蚣草对As的富集特征,As在蜈蚣草中的赋存形态、迁移及其转化,土壤以及土壤中P、Ca和K等元素对蜈蚣草吸收、转运As的影响等方面。  相似文献   

微波辅助提取凤尾蕨中总黄酮的工艺研究     

蒋琼凤  袁志辉 《湖北农业科学》2014,53(21)

以黄酮提取率为考察指标,采用单因素试验和正交试验,进行了微波辅助乙醇提取凤尾蕨(Pteris multifide Poir)中总黄酮的研究,得到微波辅助提取凤尾蕨中总黄酮的最佳工艺条件为乙醇体积分数60％,料液比1∶60(g∶mL),微波功率320W,微波提取时间60 s.此工艺条件下,凤尾蕨中总黄酮的提取率为3.318％.  相似文献   

三叶鬼针草和黑心菊根系分泌物对井栏边草配子体叶绿素荧光特性的影响   总被引：1，自引：0，他引：1  

张开梅  沈羽  刘颖  刘俊华  方炎明 《湖北农业科学》2014,53(20):4861-4864,4911

研究了入侵植物三叶鬼针草(Bidens pilosa)和非入侵植物黑心菊(Rudbeckia hirta)的根系分泌物对三叶鬼针草入侵和潜在扩散区代表蕨类植物井栏边草(Pteris multifida)配子体叶绿素荧光参数的影响.结果表明,与对照相比,除非光化学荧光淬灭系数外,三叶鬼针草和黑心菊均可降低井栏边草其他叶绿素荧光参数.这种抑制作用随2种植物根系分泌物浓度升高而增强.处理第十天,抑制效果最明显.当三叶鬼针草和黑心菊根系分泌物浓度高于12.5％时,在处理4～10d后,配子体各叶绿素荧光参数均受到显著影响.综上所述,三叶鬼针草和黑心菊对井栏边草配子体光合能力均可产生抑制作用,且三叶鬼针草抑制作用更强.  相似文献   

Growth effects of thinning damage in a Corsican pine (Pinus laricio Poiret) stand in central Italy     

R. Picchio 《Forest Ecology and Management》2011,262(2):237-243

Damage to residual stand after partial harvesting or thinning may lead to serious economic losses in terms of both timber quality at the final harvest, and tree growth reduction. Logging damages and their effect on tree growth were studied in a long term experiment on Corsican pine in central Italy. Damage frequency, agent (felling, skidding), position (root damage, stem base, between 0.3 and 1 m a.g.l., >1 m a.g.l.) and severity (light, severe) and tree growth were measured after selective thinning from below and at 10 years after the treatment. In detail, we aimed at: monitoring mechanical damages to trees at the end of thinning and after 10 years; and assessing stand stability, growing stock, ring width and basal area at 10 years after the thinning. The thinning removed about 20% of volume, 38% of trees and 26% of basal area. The basal area decreased from 56 m² ha⁻¹ to 42 m² ha⁻¹ but after 10 years it increased again to 56 m² ha⁻¹. Immediately after thinning, 13.6% of the standing trees was damaged, out of these 36.17% showed severe injuries. Damages to standing trees were mainly due to skidding. Ten years after thinning, the percentage of damaged trees was about 17%, out of which 86.67% showed severe wounds. An increase of damaged trees and of trees with severe wounds was observed suggesting that a deeper knowledge on long-term effect of logging damages is needed. This study did not highlight any effect of logging damage on tree growth. In fact, no difference in ring width was recorded between damaged and undamaged trees.  相似文献   

蜈蚣草的超微结构和砷、钙的亚细胞分布     

廖晓勇  谢华  陈同斌  肖细元  阎秀兰  翟丽梅  武斌 《植物营养与肥料学报》2007,13(2):305-312

本文对砷和钙处理下蜈蚣草羽叶中砷、钙的亚细胞分布、超微结构变化及钙定位进行了研究。无砷处理下,各亚细胞组分中砷的分布为:细胞壁>胞质>细胞器。0.2.mmol/L砷处理下,羽叶各亚细胞组分中砷的分布为:胞质>>细胞壁>细胞器。不同处理下,各亚细胞组分中钙含量变化规律相似:细胞壁最高,胞质其次,而细胞器远低于前两者。5.mmol/L钙处理对蜈蚣草羽叶细胞超微结构产生破坏,使细胞出现明显的质壁分离。在高砷高钙环境中,钙可能会增强砷对蜈蚣草的毒害效应,导致羽叶细胞的超微结构受到破坏。  相似文献   

半边旗提取物6F对HL-60细胞还原型谷胱甘肽(GSH)水平的影响   总被引：1，自引：0，他引：1  

何承伟  梁念慈  莫丽儿  李金华  张晓 《湛江医学院学报》2002,20(5):333-333,335

目的：观察半边旗提取物6F对HL—60细胞内还原型谷胱甘肽(GSH)水平的影响，从氧化机测探讨其抗肿瘤作用的机哩。方法：用邻苯二醛(OPT)荧光分光度法测定细胞内还原型谷胱甘肽．结果：58至231nmol/L 6F作用细胞20h及231nmol/L 6F作用细胞6至24h，HL—60细胞内GSH含量均明显降低，呈明显的时间剂量效应关系。结论：化合物6F可降低HL—60细胞内还原型谷胱甘肽水平，推测通过细胞内氧化机制杀伤HL—60细胞并诱导其细胞凋亡是化合物6F抗肿瘤作用机测之一．  相似文献   

Genetic Relationships and Variation among Biotypes of Dallisgrass (Paspalum dilatatum Poir.) and Related Species Using Random Amplified Polymorphic DNA Markers     

Rogéria Beatriz Miz  Tatiana Teixeira de Souza-Chies 《Genetic Resources and Crop Evolution》2006,53(3):541-552

The genus Paspalum L. consists of more than 400 species. Around twenty-five informal groups of species are recognized in Paspalum and the Dilatata group is of special interest because its members are excellent potential forage grasses. Seventy-five germplasm accessions, representing 15 taxa, were analyzed using randomly amplified polymorphic DNA (RAPD). Polymorphisms were observed with twenty-two primers in the Dilatata group and 16 of those were analyzed. Four hundred and four different RAPD fragments were generated, resulting in an average of 25.2 bands per primer. Among the 404 markers analyzed, 48 (11.88%) were exclusive for the P. dilatatum Poir. biotypes, 31 (7.67%) were exclusive to taxa belonging to other groups included in this study, 28 markers (6.93%) were diagnosed for other species of the Dilatata group and 16 (3.96%), for natural hybrids. Extensive RAPD variation was found among the species studied. Inter- and intra-taxonomic polymorphisms were detected. A dendrogram based on the RAPD data shows some clusters corresponding to the same taxa. However, the biotypes of P. dilatatum do not form a cluster. The present work confirms that the RAPD technique can be used to determine genetic relationships between the taxa belonging to the Dilatata group.  相似文献   

3种野生蕨类植物体内元素含量测定及分析     

杨光梅  朱晓彦  蒋志峰  陈勇  张轩波 《安徽农业科学》2015,(26):73-76

[目的]研究野生蕨类植物体内元素含量状况。[方法]通过采用凯氏定氮法、钼锑抗比色法和原子吸收分光光度法,对井栏边草、贯众、蜈蚣草体内N、P、Ca、Mg、Cu、Mn、Zn的含量进行了测定,并运用SPSS软件对测定结果进行分析。[结果]叶片中N、P、Mg、Zn 4种营养元素含量较高,而根中Ca、Cu、Mn 3种矿质元素含量较高,各营养元素的含量在3种蕨类中的大小顺序基本呈现出NPCaMgZnMnCu,且Mn与其他元素呈显著正相关。[结论]N、P、Mg、Zn主要存在于蕨类植物的叶中;Ca、Cu、Mn主要存在于蕨类植物的根中;Mn元素对于这3种野生蕨类而言比较重要。  相似文献   

金童观赏南瓜离体繁殖技术研究   总被引：7，自引：1，他引：6  

耿新丽  赵一鹏  秦勇 《安徽农业科学》2006,34(7):1338-1339

通过消毒时间、外植体来源、激素组合等因素对观赏南瓜(金童)组织培养技术离体繁殖影响的研究,建立了其离体繁殖技术。试验结果表明:在利用子苗获得外植体过程中,南瓜种子用70%酒精表面消毒30 s,再用0.1%HgCl2溶液消毒10 min,可以获得最佳的消毒效果;在再生过程中,顶芽外植体的芽诱导率比子叶外植高;最佳诱导培养基组合为2/3 MS+6-BA 0.5 mg/L+3%蔗糖+0.7%琼脂。  相似文献