润楠属植物一名称

润楠属植物一名称左家哺（湖南林业专科学校,衡阳４２１００５）关键词润楠属,新名称,秃叶润楠ＡＮＥＷＮＡＭＥＩＮＭＡＣＨＩＬＵＳ（ＬＡＵＲＡＣＥＡＥ）￥ＺｕｏＪｉａｆｕ（ＨｕｎａｎＦｏｒｅｓｔｒｙＴｅｃｈｎｉｃａｌＣｏｌｌｅｇｅ,Ｈｅｎｇｙａｎｇ４２１...     

中国荨麻科冷水花属的研究

冷水花属Pilea Lindl.是荨麻科藤麻族Trib.Prccrideae^[22]中的一个较原始的属,也是荨麻科最大的一个属,约600^[14]种,约占该科全部种数的三分之一^*,主要分布于美洲、亚洲、非洲和大洋洲的新几内亚的热带和亚热带地区,温带地区较少。在我国,原记录有70余种,经研究整理后,本文记载了85种(其中存疑种2种),8亚种,7变种,其中新种31种,我国新记录9种,还有部分标本暂时难以作出鉴定,它们代表了大约六、七种,这样,估计我国冷水花属植物约有90余种,为我国尊麻科的一个大属(另一大属楼梯草属Elatostema, 108种) (王文采,中国植物志手稿,未发表),主要分布于长江流域以南地区,少数种类可分布到东北省区。这属植物喜好生长于山坡阴湿处,是为这些地区山坡阴湿环境草本植被的重要建群植物。     

A RHIZOPLAST IN CARTERIA RADIOSA (CHLOROPHYCEAE)12

A rhizoplast or rhizoplast-like structure was observed with the electron microscope in Carteria radiosa. The cross-banded structure extends from the proximal end of each of at least 2 of the basal bodies and extends toward, although does not make contact with, the nucleus. The rhizoplast terminates in a ribosome-free area composed of fine granules and microfibrils. This is the first ultrastructural verification of a rhizoplast in a volvocalean alga.     

A CALCIUM-DEPENDENT PROTEIN KINASE FUNCTIONS IN WOUND HEALING IN VENTRICARIA VENTRICOSA (CHLOROPHYTA)

The cytoplasm around a wound made in the multinucleate unicellular green alga Ventricaria ventricosa (  J. Agardh) Olsen et West formed an aggregation-ring surrounding the wound immediately after injury. A contraction of the ring then brought about wound healing in culture medium containing Ca^{2 +} . Involvement of a calcium-dependent protein kinase (CDPK) as a regulator of wound healing was examined using an anti- Dunaliella tertiolecta CDPK antibody. A 52-kDa protein cross-reacting with the antibody was detected by Western blotting. Protein kinases of 60 kDa and 52 kDa, which were markedly activated by Ca^{2 +} , and a 40-kDa Ca^{2 +} -independent protein kinase were detected by an in-gel protein kinase assay using myelin basic protein as the substrate. A 52-kDa band with Ca^{2 +} -dependent protein kinase activity was immunoprecipitated from the cytoplasmic extract, indicating that these 52-kDa proteins are identical and possess CDPK activity. Microscopic observation showed that the contraction of the aggregation ring was suppressed by application of the anti-CDPK to the culture medium. A protein kinase inhibitor, K-252a, and the calmodulin inhibitors, calmidazolium and compound 48   /   80, which inhibit CDPK activity, also suppressed the contraction of the aggregation-ring. Immunofluorescence microscopy showed a similar distribution of 52-kDa CDPK to the distribution of f-actin, which was randomly distributed in an intact cell and formed a bundle during wound healing. Further, f-actin was not recruited after injury in the presence of the antibody to CDPK. These results suggest that the 52-kDa CDPK functions as a Ca^{2 +} receptor in wound healing and simultaneously participates in the organization and contraction of f-actin to heal the wound.     

A STUDY OF MEIOSIS IN HAPLOPAPPUS GRACILIS (COMPOSITAE)

Jackson , R. C. (U. Kansas, Lawrence.) A study of meiosis Haplopappus gracilis (Compositae). Amer. Jour. Bot. 46(7): 550–554. Illus. 1959.—A study of meiosis in the two-paired Haplopappus gracilis has shown that each pair of chromosomes is easily recognized throughout the various stages of meiosis beginning with pachytene. A comparison of mitotic and meiotic chromosomes has been made, and the data indicate that a conspicuous heteropycnotic knob on chromosome B at pachytene is the nucleolar organizer. Other recognizable chromomeres were observed, but additional study is needed before a cytological map can be drawn to show whether regions other than those described on chromosome A and B may be used as markers.     

A PERSISTENT VIRUS INFECTION IN FELDMANNIA (PHAEOPHYCEAE)1

A virus infection is described within the unilocular sporangia of Feldmannia sp., a filamentous brown alga (Phaeophyceae). The alga is easily maintained in culture and vegetative growth is vigorous, but formation of icosahedral virions 150 nm in diameter completely displaces production of zoospores. The viruses, estimated at 1–5 × 10⁶ per sporangium, are eventually released by rupture of the sporangial wall. Deoxyribonucleic acid (DNA) isolated from the viruses can be readily digested with restriction endonucleases and consists of ca. 170 kbp of double-stranded DNA.     

云南虉草族植物的订正

在禾本科植物编志工作中,我们先后订正了一些族、属和种的分类学问题,发现了不少新植物和一些在我国境内首次记录的种。本文只报道云南虉草族的各分类群,包括茅香属1种,黄花茅属4种1变种,其中1个是新种,1个是新变种,1种是中国新记录,虉草属3种及1变种,其中2种是中国新记录。     

中国发现颚姬蜂属(膜翅目,姬蜂科)

报道在中国首次发现的颚姬蜂属Clodeates Towaes,1969并1新纪录种：盘颚姬蜂Claseates discedens（Woldstedt,1874）.     

A SURVEY OF WILD OATS (AVENA FATUA AND A. LUDOVICIANA) IN ENGLAND AND WALES IN 1951

In 621 samples of wild oats, collected in England and Wales by N.A.A.S. and N.I.A.B. Officers, only two species ( Avena fatua and A. ludoviciana ) were found but both were very variable. A. fatua occurred in all wheat- and barley-growing areas, in both winter and spring corn and on all soil types. A. ludoviciana occurred (with two exceptions) only within approximately 80 miles radius of Oxford, mainly on heavy soila and chiefly in winter corn.
The amount of wild oats present appeared to depend on the frequency in the rotation of corn or other crops in which wild oats would shed seed. Deep ploughing often increased the infestation. The data did not show whether a field could be freed of wild oats by grassing down for a number of years, nor what is the maximum period of survival of buried wild oat seeds.     

CHARACTERIZATION OF POLY(A) SEQUENCES IN BRAIN RNA

—Nuclear and polysomal brain RNA from the rabbit bind to Millipore filters and oligo(dT)-cellulose suggesting the presence of poly(A) sequences. The residual polynucleotide produced after RNase digestion of ³²P pulse-labelled brain RNA is 95% adenylic acid and 200-250 nucleotides in length. After longer isotope pulses the polysomal poly(A) sequence appears heterodisperse in size and shorter than the nuclear poly (A). Poly(A) sequences of brain RNA are located at the 3′-OH termini as determined by the periodate-[³H]NaBH₄ labelling technique. Cordycepin interferes with the processing of brain mRNA as it inhibits in vivo poly(A) synthesis by about 80% and decreases the appearance of rapidly labelled RNA in polysomes by about 45%. A small poly(A) molecule 10-30 nucleotides in length is present in rapidly labelled RNA. It appears to be less sensitive to cordycepin than the larger poly(A) and is not found in polysomal RNA.     

中国胭脂鱼同工酶的研究

本文利用同工酶电泳方法,研究了中国胭脂鱼的种群关系。分析的五种酶均为单态,故中国胭脂鱼应为一个种。并根据重复基因表达(祖征)情况,认为它应属于较原始的种类。少数重复基因不表达,形成功能二倍体为离征。其酶谱表现了组织的异质性,伹无性别、年龄的差异。     

A STARCH GRAIN-MITOCHONDRION-DICTYOSOME ASSOCIATION IN BATRACHOSPERMUM(RHODOPHYTA)1

In Batrachospermum sirodotii Skuja the dictyosome-mitochondrion association, commonly reported in other red algae, includes a floridean starch grain during periods of intense dictyosomal activity. Such an organellar assemblage may serve to provide the most efficient means of energy flow during periods of peak dictyosomal activity.     

禾本科甘蔗亚族一新属

８０年代初期,我们在云南采到５号标本,解剖观察认为是甘蔗亚族（Ｓａｃｃｈａｒｉｎａｅ）植物。再进一步查对,要把它放入这个亚族中的任何一属均觉不妥。故另立新属与新种。本新属与芒属（Ｍｉｓｃａｎｔｈｕｓ）似有亲缘关系。     

苏铁属一新亚种

苏铁属一新亚种陈介,云波（中国科学院昆明植物研究所,昆明６５０２０４）（个旧市第二中学,个旧６６１４００）关键词苏铁科,苏铁属,新亚种、蔓耗苏铁蔓耗苏铁新亚种ＡＮＥＷＴＡＸＡＯＦＣＹＣＡＳ（ＣＹＣＡＤＡＣＥＡｋ）ＩＮＹＵＮＮＡＮ￥ＣＮＥＮＣｈｅｉｈ（...     

CHLOROPLAST-DNA PHYLOGENETICS AND BIOGEOGRAPHY IN A RETICULATING GROUP: STUDY IN POA (POACEAE)

Cladistic analysis of Poa chloroplast DNA (cpDNA) restriction sites tested previously hypothesized relationships within the genus. Forty-six taxa representing 19 sections or groups and three subgenera of Poa and two out-group genera, Puccinellia and Bellardiochloa, are analyzed. Five major and several minor cpDNA groups are identified. The cpDNA cladogram is generally congruent with the subgeneric taxonomy of Poa. Exceptions are reclassified or are discussed in terms of character incompatibilities and possible reticulation events. The cpDNA tree detected relationships among sections that were unresolved using traditional character sets and provides a basis for polarization of morphological character states. An assessment of biogeographic events based on the cpDNA tree suggests: 1) Poa originated in Eurasia; 2) at least six groups of species independently colonized North America; and 3) two of the latter groups colonized South America, and one closely related group colonized New Zealand and Australia. The cpDNA tree provided a conservative estimate of the number of amphi-neotropical disjunctions when compared to the known number of species disjunctions.     

河南金腰属和省沽油属的订正

归并了金腰属１种和省沽油属１变种,报道２个新异名。