色木槭的变异式样及其分类学

色木槭(Aeer mono Maxim.)是分布于亚洲东部的一个变异极大的种。本文报道了7个亚种:色木槭(原亚种)(subsp.mono);海岛色木槭(亚种)(subsp.marmoraturn(Nichols.)T.Z.Hsu);毛萼色木槭(亚种)(subsp.glabrum(Levl.et Vant.)T.Z.Hsu);里光色木槭(亚种)(subsp.trichobasis(Nakai)T.Z.Hsu);金沙色木槭(亚种)(subsp.tricuspis(Rehd.)T.Z.Hsu);弯翅色木槭(亚种)(subsp.incurvaturn(Fang et P.L.Chiu)T.Z.Hsu);粉绿色木槭(亚种)(subsp.glaucum(Koidz.)T.Z.Hsu),讨论了其变异式样和地理分布。     

四川白珠树属（Gaultheria）一新变种

发表了白珠树属米易白珠一新变种,即大花白珠(Gaultheria miyienensis T. Z. Tsu var. macrantha J. L. Liu et Q. Luo)     

中国大陆天麻属(兰科)一新记录种——乌来天麻

该文报道了在广西七冲国家级自然保护区发现的中国大陆兰科(Orchidaceae)天麻属(Gastrodia R. Brown)一新记录种——乌来天麻(G. uraiensis T. C. Hsu & C. M. Kuo)。乌来天麻形态较近似于春天麻(G. fontinalis T. P. Lin),但乌来天麻的花序、花被筒较短,唇盘中部具4条纵向脊,脊向舌状先端延伸、合并成更高的2条,易与春天麻相区别。同时,还描述了新记录种的形态特征,提供了彩色图版,并讨论了此次新发现的生物地理学意义。     

延胡索分类的化学证据

东阳产延胡索与大连产齿瓣延胡索经成分分离和TLC、HPLC对比,发现延胡索以啊扑啡类生物碱如glaucine为主,而齿瓣延胡索则含corynoline类生物碱。根据生物碱的类型及含量比较,二者有明显差异,结合延胡索的植物形态和植化分类特征判断,将延胡索作为与齿瓣延胡索近缘的独立种处理较为合理,即为Corydalis yanhusuo W. T. Wang ex Z.Y. Su et C. Y. Wu     

Liparis tsii: a new species of Orchidaceae (tribe-Malaxideae) from Guangdong,China with its phylogenetic position

Liparis tsii, a new orchid from Guangdong, China, is described and illustrated. It is compared with its closest allies: L. sasakii Hayata, L. nanlingensis H.Z. Tian & F.W. Xing, L. krameri Franch. & Sav., L. reckoniana T.C. Hsu and L. brunnea Ormerod belonging to section Liparis. Further phylogenetic study based on combined molecular data from nrITS and plastid trnL-F ascertained its phylogenetic position as L. tsii being sister to L. sasakii and L. nanlingensis. A key to identification with the allied species is provided.     

Epstein-Barr Virus-Specific RNA III. Mapping of DNA Encoding Viral RNA in Restringent Infection

Namalwa and Raji cells, originally obtained from a Burkitt tumor biopsy, grow as continuous cell lines in vitro and contain the Epstein-Barr virus (EBV)-related nuclear antigen EBNA (B. M. Reedman and G. Klein, Int. J. Cancer 11:499-520, 1973) and RNA homologous to at least 17 and 30% of the EBV genome, respectively (S. D. Hayward and E. Kieff, J. Virol. 18:518-525, 1976; T. Orellana and E. Kieff, J. Virol. 22:321-330, 1977). The polyribosomal and polyadenylated [poly(A)+] RNA fractions of Namalwa and Raji cells are enriched for a class of viral RNA homologous to 5 to 7% of EBV DNA (Hayward and Kieff, J. Virol. 18:518-525, 1976; Orellana and Kieff, J. Virol. 22:321-330, 1977). The objective of the experiments described in this communication was to determine the location within the map of the EBV genome (D. Given and E. Kieff, J. Virol. 28:524-542, 1978) of the DNA which encodes the viral RNA in the poly(A)+ and non-polyadenylated [poly(A)-] RNA fractions of Namalwa cells. Hybridization of labeled DNA homologous to Namalwa poly(A)+ or poly(A)- RNA to blots containing EcoRI, Hsu I, or Hsu I/EcoRI double-cut fragments of EBV (B95-8) or (W91) DNA indicated that these RNAs are encoded by DNA contained primarily in the Hsu I A/EcoRI A and Hsu I B/EcoRI A fragments and, to a lesser extent, in other fragments of the EBV genome. Hybridizations of Namalwa poly(A)+ and poly(A)- RNA in solution to denatured labeled EcoRI A or B fragments, Hsu I A, B, or D fragments, and Hsu I A/EcoRI A or Bam I S fragments and of Raji polyribosomal poly(A)+ RNA to the EcoRI A fragment indicated that (i) Namalwa poly(A)+ RNA is encoded primarily by 6 x 10(5) daltons of a 2 x 10(6)-dalton segment of DNA, Bam I S, which is tandemly reiterated, approximately 10 times, in the Hsu I A/EcoRI A fragment and is encoded to a lesser extent by DNA in the Hsu I B, EcoRI B, and Hsu I D fragments. Raji polyribosomal poly(A)+ RNA is encoded by a similar fraction of the EcoRI A fragment as that which encodes Namalwa poly(A)+ RNA. (ii) The fraction of the Bam I S fragment homologous to Namalwa poly(A)- RNA is similar to the fraction homologous to Namalwa poly(A)+ RNA. However, Namalwa poly(A)- RNA is homologous to a larger fraction of the DNA in the Hsu I B, Hsu I D, and EcoRI B fragments.     

Pseudocayratia,a new genus of Vitaceae from China and Japan with two new species and three new combinations

Recent integrative systematic studies of Vitaceae support the recognition of a new genus Pseudocayratia J.Wen, L.M.Lu & Z.D.Chen. The genus consists of five species from China and Japan. We herein describe the following two new species: Pseudocayratia speciosa J.Wen & L.M.Lu, and P. pengiana Hsu & J.Wen, and make three new combinations: Pseudocayratia dichromocarpa (H.Lév.) J.Wen & Z.D.Chen, P. oligocarpa (H.Lév. & Van.) J.Wen & L.M.Lu, and P. yoshimurae (Makino) J.Wen & V.C.Dang. Phylogenetic analyses based on five chloroplast loci strongly support Pseudocayratia as sister to Tetrastigma. Morphologically, species of the genus have stigmas enlarged (but not 4‐lobed), pedicels at fruiting stage enlarged and fleshy, seeds with a crustaceous thin testa, circular cup‐like ventral infolds, linear chalaza extending ca. 2/3 to 3/4 of the seed length (from apex to base), lateral margin with thin edges, and T‐shaped endosperm in cross‐section. The genus is distributed in eastern Asia (China and Japan). The taxonomic novelties we report in this study at both the generic and species levels highlight the importance of collections‐based research in today's integrative systematics.     

中国大陆天麻属(兰科)新资料

报道中国大陆兰科(Orchidaceae)天麻属(Gastrodia R. Brown)二新记录种——折柱天麻(Gastrodia flexistyla T. C. HsuC. M. Kuo)和叉脊天麻(Gastrodia shimizuana Tuyama)。折柱天麻与日本天麻[Gastrodia nipponica(Honda) Tuyama]相似,但前者花被筒长、疣状凸起不明显,唇瓣绿黄色等特征可与后者相区分。叉脊天麻与冬天麻(Gastrodia pubilabiata Sawa)相近,但前者花被筒浅黄褐色至淡红褐色,唇瓣三角状、白色等特征易与后者相区别。该文提供了新记录种的形态描述及图版。     

Identification of early adenovirus type 2 RNA species transcribed from the left-hand end of the genome.

Unique fragments of adenovirus type 2 DNA generated by cleavage with endonuclease R-Eco RI or endonuclease R-Hsu I (Hin dIII) were used to map cytoplasmic viral RNAs transcribed early in productive infection. Radioactive early viral RNA was first fractionated by polyacrylamide gel electrophoresis. Eluted viral RNAs were then tested for hybrid formation with DNA fragments. The Eco RI DNA fragment (Eco RI-A) which contains the left-hand 58% of the genome hybridized 13S and 11S RNAs. More detailed mapping of these RNAs was achieved by hybridization to the seven Hsu I fragments of Eco RI-A. The early RNA annealed only to Hsu I-G and C, two fragments which comprise the extreme left-hand 17% of the genome. Viral RNA migrating as 13S and 11S annealed to Hsu I-G, and 13S RNA annealed to Hsu I-C. A 13S RNA is transcribed from Eco RI-A late in infection (18 h). Hybridization-inhibition studies with Eco RI-A DNA, early cytoplasmic RNA, and 3H-labeled 13S late RNA demonstrated that this RNA synthesized at late times is an early RNA species which continues to be synthesized in large amounts at 18 h. This 13S RNA synthesized at 18 h hybridized to Hsu I-C but not to Hsu I-G DNA. These results establish that the 13S RNAs transcribed from Hsu I-G and C at early times must be different species.     

湖北菱科的数量分类研究[Ⅱ]

引言菱科(Trapaceae)植物为一年生水生浮叶草本,常见于湖泊,池塘及沟渠中。全世界约有70余种,主要分布于旧大陆的温带、亚热带地区,亦见于热带地区,如印度,东南亚及非洲,后来被引进美洲大陆和澳大利亚。中国有5至10种及其栽培种。菱科为一单属科。自林奈时期以来,菱科的分类学研究一直是一个富有探索性的问     

THE ORDOVICIAN TRILOBITES OF SOUTHWESTERN CHINA

INTRODUCTION The materials described here in this paper were collected from three regions (1) in theOmeishan of Szechuan, (2) along the Szechuan-Kweichow border, and (3) in the central Yunnan.Collections from the former two regions were collected by the author in 1938-1940, while fromMr. C. S. Pien and the late Mr. T. Y. Hsu. The trilobite-bearing strata of these regions     

Six New Bamboo Species from Guangdong

Six new taxa of the Bambusoideae are described from Guangdong Province, China. They are Indosasa suavis W. T. Lin et Z. J. Feng, Phyllostachys purpureomaculata W. T. Lin et Z. J. Feng, Arundinaria quadrangula W. T. Lin et Z. J. Feng, A. pubiannula W. T. Lin et Z. J. Feng, Gelidocalamus albopubescens W. T. Lin et Z. J. Feng, and Sasa duplicata W. T. Lin et Z. J.Feng.     

中国大陆鸢尾兰属(兰科)二新记录种

首次报道了中国大陆兰科(Orchidaceae)鸢尾兰属(Oberonia)二新记录种:密花鸢尾兰[O. seidenfadenii (H. J. Su) Ormerod]和齿唇鸢尾兰(O. segawae T. C. Hsu & S. W. Chung),并提供了它们的形态特征描述。     

人晶体膜内蛋白MPl9基因（LIM2）启动子上一个晶体特异顺式元件的鉴定

使用重叠和变异的寡核苷酸作为探针,凝胶迁移分析和竞争实验分析了LJM2转录起始位点上游-47至-32的区域,与其高度亲和结合的一个蛋白复合体看来仅仅结合到这个DNA双链区域的“敏感”位点。这个位点的序列由4个G核苷,接着7个其他核苷酸(AACCTAA)及连着另外4个G核苷组成,即GGGGAACCTAAGGGG;我们称其为Hsu元件。使用含有这个元件或相应的变异元件所构建的uM2基因启动子-CAT质粒的活性分析表明：Hsu元件是位于LJM2基因启动子之内,它是LJM2基因表达所必须的。结合到Hsu元件的反式因子存于晶体发育期间,看来是晶体特异性的。由于LIM2基因启动子并不包含一个经典的TATA盒,这个Hsu元件可能充当RNA复制酶复合体结合的位点。     

人晶体膜内蛋白MP19基因（LIM2）启动子上一个晶体特异顺式元件的鉴定

使用重叠和变异的寡核苷酸作为探针,凝胶迁移分析和竞争实验分析了LIM2转录起始位点上游-47至-32的区域,与其高度亲和结合的一个蛋白复合体看来仅仅结合到这个DNA双链区域的“敏感”位点。这个位点的序列由4个G核苷,接着7个其他核苷酸(AACCTAA）及连着另外4个G核苷组成,即GGGGAACCTAAGGGG; 我们称其为Hsu元件。使用含有这个元件或相应的变异元件所构建的LIM2基因启动子CAT质粒的活性分析表明Hsu元件是位于LIM2基因启动子之内,它是LIM2基因表达所必须的。结合到Hsu元件的反式因子存于晶体发育期间,看来是晶体特异性的。由于LIM2基因启动子并不包含一个经典的TATA盒,这个Hsu元件可能充当RNA复制酶复合体结合的位点。     

SOME LOWER ORDOVICIAN OSTRACODS FROM WESTERN HUPEH

The specimens of Ostracoda dealt herewith were collected by Messrs.K.C.Yangand A.T.Mu from the Ichang formation of Lower Ordovician during their field tripin western Hupei in the Spring of 1951.Six new species in three different genera ofwhich one is new,are described in the present paper.All of them are found inassociation with graptolites and triobites.The Ichang formation has been divided     

Case study: Bone mineral density of two elite senior female powerlifters

The purpose of this case study was to examine the bone mineral density (BMD) of 2 women, aged 48 and 54 years, who had engaged in high-intensity resistance training for >30 years each and gained national prominence for their lifting performances. Each subject was measured using a dual x-ray absorptiometry (GE Lunar Prodigy, Fairfield, CT, USA) for both the BMD (grams per centimeter squared) and bone mineral content (grams) of the lumbar spine, dual femur, and total body. The Z and T scores of the 49-year-old subject were significantly higher than either age and gender-matched or peak BMD norms (lumbar spine Z + 2.2, T + 1.8, femoral mean Z + 1.1, T + 0.6, total body Z + 2.4, T + 2.0). The Z and T scores of the 54-year-old mark the largest ever reported in the literature for a Caucasian woman of this age (lumbar spine Z + 2.8, T + 2.2, femoral mean Z + 1.4, T + 1.9, total body Z + 2.6, T + 3.0). Although these results do not prove any causal relationship between long-term high-intensity strength training and elevated BMDs among women, they do raise questions that some type of relationship may exist.     

白赤箭，中国大陆天麻属新记录种

报道了中国大陆兰科(Orchidaceae)一新记录种:白赤箭(Gastrodia albida T. C. HsuC. M. Kuo)。该种在广东省两个省级自然保护区内均有发现,凭证标本保存于中国科学院华南植物园标本馆(IBSC)。白赤箭以花被管具疣状突起,侧瓣大部分分离,唇瓣基部平截,合蕊柱无蕊喙而与同属其他种类相区别。提供了该种的特征描述、彩色照片及分类学信息。     

DNA of Epstein-Barr virus. III. Identification of restriction enzyme fragments that contain DNA sequences which differ among strains of Epstein-Barr virus.

Previous kinetic and absorption hybridization experiments had demonstrated that the DNA of the B95-8 strain of Epstein-Barr virus was missing approximately 10% of the DNA sequences present in the DNA of the HR-1 strain (R.F. Pritchett, S.D. Hayward, and E. Kieff, J. Virol. 15:556-569, 1975; B. Sugder, W.C. Summers, and G. Klein, J. Virol. 18:765-775, 1976). The HR-1 strain differs from other laboratory strains, including the B95-8 and W91 strains, and from virus present in throat washings from patients with infectious mononucleosis in its inability to transform lymphocytes into lymphoblasts capable of long-term growth in culture (P. Gerber, Lancet i:1001, 1973; J. Menezes, W. Leibold, and G. Klein, Exp. Cell. Res. 92:478-484, 1975; G. Miller, D. Coope, J. Niederman, and J. Pagano, J. Virol. 18:1071-1080, 1976; G. Miller, J. Robinson, L. Heston, and M. Lipman, Proc. Natl. Acad. Sci. U.S.A. 71:4006-4010, 1974). In the experiments reported here, the restriction enzyme fragments of Epstein-Barr virus DNA which contain sequences which differ among the HR-1, B95-8, and W91 strains have been identified. The DNA of the HR-1, B95-8, and W91 strains each differed in complexity. The sequences previously shown to be missing in the B95-8 strain were contained in the EcoRI-C and -D and Hsu I-E and -N fragments of the HR-1 strain and in the EcoRI-C and Hsu I-D and -E fragments of the W91 strain. The HR-1 strain was missing DNA contained in EcoRI fragments A and J through K and Hsu I fragment B of the B95-8 strain and in the EcoRI-A and Hsu I-B fragments of the W91 strain. The relationship of these data to the linkage map of restriction enzyme fragments of the DNA of the B95-8 and W91 strains (E. Kieff, N. Raab-Traub, D. Given, W. King, A.T. Powell, R. Pritchett, and T. Dambaugh, In F. Rapp and G. de-The, ed., Oncogenesis and Herpesviruses III, in press; D. Given and E. Kieff, submitted for publication) and the possible significance of the data are discussed.