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<正> 木新变种无枝刺;叶小,革质,卵形、椭圆形或圆形,长4—15毫米,宽8—10毫米,两面中脉密被白色长柔毛,后渐脱落;叶柄长约2毫米;花小,单生,疏离或紧密排成长3—12毫米的穗状花序;花萼外面光滑无毛;花辦匙形,顶端啮蚀状,外面具中肋突起;柱头2浅裂,子房2室,很明显不同于雀梅藤(原变种)和毛叶雀梅藤(变种)。 广西:扶绥县,渠黎乡,厚寨,石灰岩山,山顶,灌丛中,1985年7月21日,刘寿养、陈鼎常F00190(花模式!存广西中医学院标本室,等模式存广西植物研究所和广西小医药研究所标本室);扶南乡,新宁镇,石灰岩山,1985年7月25日,刘寿养、陈鼎常F00496。 相似文献
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中国南部石灰岩稀有濒危植物名录 总被引:25,自引:0,他引:25
<正> 本名录是“中国南部石灰岩濒危植物研究”课题的一部分。名录以许兆然傅士的“中国热带亚热带石灰岩植物区系”研究和文和群及其同事对广西石灰岩植物的研究为基础,通过对广西百色、云南文山两地区的野外采集调查及对文献资料的收集研究而提出。野外工作得到广西植物研究所覃民府、韦毅刚、钟树华、何顺清及华南师范大学周云龙等先生的帮助,广西植物研究所梁健英女士提供资料,韦发南先生进行了指导。 相似文献
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广西蕨类植物研究(4) 总被引:2,自引:0,他引:2
<正> 本文记载广西蕨类植物新记录科1个、属8个、种11个及2个新分类群。文中引用标本除注明者外,其余均存广西农学院植物标本室(GXAC)。 水韭科Isoetaceae 广西新记录科,本科现仅存1属。 1.水韭属Isoetes L.,Sp. P1.2:1100.1753. (1)水韭 Isoetes sinensis Palmer in Amer.Fern Journ.17:112 cum f.1927;Chingin Sinensia 3:348。1933。中国高等植物图鉴 1:115,图230。1972。 广西北部:桂林,雁山,海拔200米,石灰岩,水田中,1952年11月11日,梁畴芬30688 相似文献
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作者观察了红豆(Ormosia henryi Prain)的染色体数目并且作了核型分析。红豆种子采自广西植物研究所标本园,凭证标本存广西植物研究所标本室。种子经砂培萌发后取根,按常规法压片,铁矾—苏木精染色,永久片按樟油——醋酸法制成永久片,即A.1/3樟油、1/3醋酸、1/3 95%酒精退片;B.2/3樟油、1/3醋酸5分钟; 相似文献
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广西青藤属一新种及同属药用植物 总被引:1,自引:0,他引:1
<正> 在编写广西植物志的过程中,发现青藤属植物1个新种。通过详细鉴定,现知广西产的同属植物有6种和2变种,其中民间作药用的(以原始采集记录为根据)有4种和2变种,现报道如下。 相似文献
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几年来,我所在中草药资源调查工作中,发现一些我国及广西未曾记录过的植物,现整理成文,以供有关部门参考。本文引用的标本均收藏在广西中医药研究所植物标本室(GXMI)。 山椒子水番挑(博白)番落技科Annonaceae Uvar花a grandiflora Roxb.in FI.Ind.2:665.1524;李秉滔,植物分类学报14(1):98.2976,蒋英,李秉滔,中国植物志30(2):26,图版10. 1979。 广西东南部:博白县,浪平公社,水库边1971年5月9日,王鉴均2247外北流县,隆盛公社,天堂,坡地疏林中,1977年9月26日北流调查队8一44口7。 分布:广东南部,广西东南部;印度、缅甸、泰国、越南、马来… 相似文献
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<正> 大戟科在广西植物区系中为大科之一,约50属,200种以上,广布区内各地,但热带性较强的种类主要见于桂东南经桂南至桂西北山区。近年来笔者在编写《广西植物志》第二卷工作中,按分工要求,对所承担的属的馆藏标本作了全面整理研究。现将研究结果报道,以资利用。本文共记载19属56种。 相似文献
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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme
responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare
the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show
that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by
distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of
demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least
one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of
the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable
potent antiproliferative synthetic drugs. 相似文献
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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases 相似文献
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The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle. 相似文献
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鸡传染性法氏囊病病毒研究进展 总被引:3,自引:0,他引:3
传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的. 相似文献
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Renfei Lu Xiuming Wu Zhenzhou Wan Yingxue Li Lulu Zuo Jianru Qin Xia Jin Chiyu Zhang 《中国病毒学》2020,35(3):344-347
In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans. 相似文献