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中国斑蚜科物种多样性及地理分布格局 总被引:5,自引:4,他引:1
从分类群的多样性、寄主植物多样性和地理分布多样性3个方面系统研究了中国斑蚜科蚜虫的物种多样性。分类群的多样性从亚科、属和种3个不同阶元进行了描述。寄主植物的多样性体现在:不同蚜虫类群寄主植物的丰富度,其中角斑蚜亚科的寄主最为丰富,包括14个科的植物;同类寄主植物上取食蚜虫的多样性,其中桦木科植物上有15个属的蚜虫取食。在地理分布上,斑蚜科在中国主要分布在古北界的4个区和东洋界的3个区,以古北界的成分占优势;而且华北区种类最为丰富,其次为东北区、华中区、华南区和蒙新区。属的分布类型可分为12种,分别为中国特有分布型、东亚特有分布型、古北界特有分布型、东洋界特有分布型、全北界分布型、全北界和澳洲界共有分布型、古北界和东洋界共有分布型、全北界和东洋界共有分布型、全北界和非洲界共有分布型、古北界、东洋界和非洲界共有分布型、东洋界和澳洲界共有分布型及东洋界、非洲界和澳洲界共有分布型,其中以东亚特有分布型为最丰富,有10个属;其次为全北界分布型,有7个属,同时中国的特有成分也相当高,涉及6个属。纵观整个中国斑蚜科属级阶元的分布类型,中国的斑蚜科以全北界成分为主,其次为东洋界成分。斑蚜科在中国的地理分布,由东向西,种类越来越贫乏,特别是青藏高原,种类很少;从南北向来看,以华北区为中心,向两边扩散,东北区、华南区和华中区种类都有所减少。 相似文献
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福建高海拔山区啮齿动物的调查报告 总被引:4,自引:0,他引:4
1988-1995年于福建高海拔山区不同景观进行啮齿动物区系组成与分布调查。共捕获啮齿动物标本4079只,经鉴定属2科5属12种。以古北界种类(黑线姬鼠、黑腹绒鼠、东方田鼠)3种占25%,东洋界种(针毛鼠、社鼠、青毛鼠、黄胸鼠、黄毛鼠、田小鼠)6种占50%,广布2种(小家鼠、褐家鼠)占167%,外来种1种(黑家鼠)占83%。 相似文献
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澳门的两栖和爬行动物 总被引:3,自引:1,他引:2
澳门已知两栖爬行动物(不包括海产种类) 3 目14 科28 属38 种, 其中两栖动物1 目4 科5 属9 种, 爬行动物2 目10 科23 属29 种。物种密度高达17715-6/104km2 。均为东洋界成分, 以南中国型占优势, 其次为印度马来型、印度支那型和泛东洋界型。与广东省的生物相似值为0-43, 与香港的生物相似值为0-54 。在动物地理区划上应属东洋界中印亚界华南区的东南沿海亚区。 相似文献
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澜沧江漫湾电站水库地区爬行动物多样性研究 总被引:2,自引:2,他引:0
漫湾电站水库地区有爬行动物46种,隶属3目10科37属。特点是:(1)特种多样性很丰富,为中国扑行类种娄11.89%,为云南的30.46%,是云南省和全国爬行类很丰富的地区;(2)东洋界种类占绝对优势(97.83%),没有古北界种类,古北东洋两界广布种仅1种;(3)西南区与华南区种类分别为20及19种;华中区及华中华南两区广布种很少;(5)特有种多,在我国主要产于云南有8种,占17.39%,其中云 相似文献
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对新疆蛾类标本鉴定和资料整理,共得到蛾类12科245属549种。其中种类最多的是夜蛾科Noctuidae136属364种,物种数量超过20种的分别有卷蛾科Tortricidae 24属36种,天蛾科Sphingidae 13属30种,灯蛾科Arctiidae 19属25种和木蠹蛾科Cossidae 8属25种;物种数超过10种的有尺蛾科Geometridae 13属18种,螟蛾科Pyralidae 14属17种和舟蛾科Notodontidae 8属17种;其余几个科种类均少于10种。在世界动物地理中,新疆蛾类以古北界为主,种数占到了434种(79.05%),其他动物地理区划组成类型仅115种(20.95%)。属级区系类型与种级基本一致,古北界162种,占总数的66.12%;古北界+东洋界共有58属,占23.67%,两种分布型占总数的89.79%。在中国动物地理中,新疆蛾类与蒙新区关系最为密切,共计245种(44.63%),其次是蒙新与华北共有56种(10.20%),蒙新与青藏共有52种(9.47%),其他动物区系组成较少。属级的区系类型以蒙新区为主,与同处古北界的东北区、华北区和青藏区关系最为密切。 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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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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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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Meng Miao Gang Deng Xiaobei Xiong Yang Qiu Wenda Huang Meng Yuan Fei Yu Shimei Bai Xi Zhou Xiaolu Zhao 《中国病毒学》2022,37(2):314-317
Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions. 相似文献
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions. 相似文献
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Dong Liu Xin Wang Yisong Wang Peigang Wang Dongying Fan Sichang Chen Yuguang Guan Tianfu Li Jing An Guoming Luan 《中国病毒学》2018,33(5):402-409
Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8+ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8+ T cells are involved in the pathogenesis of RE. 相似文献
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Shen Jia-Yuan Li Man Xie Lyu Mao Jia-Rong Zhou Hong-Ning Wang Pei-Gang Jiang Jin-Yong An Jing 《中国病毒学》2021,36(1):145-148
正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016). 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