MIDDLE ORDOVICIAN MOLLUSCS FROM THE PAIYANGHO REGION,CHILIENSHAN(“NANSHAN”)

INTRODUCTIONThis paper deals with all the fossil molluscs collected respectively by Dr.P.Li's party in1956 and Dr.T.H.Yin's party in 1957 of the Institute of Geology,Academia Sinica.Pre-liminary reports regarding the discovery of the Ordovician in the Paiyangho region has been madeby Li,and Yang(1957),and Li,Hsieh and Ho(1958),while the writer had twice reported     

PERMIAN CEPHALOPODS FROM TANCHIASHAN,HUNAN

The present paper deals with the material of fossil cephalopods largely col-lected by Mr.Y.C.Hs(?) and the writer in the spring of 1944,from the Tan-chiashan Coal-field in the Hsiangtan district,Central Hunan.It also includesthe specimens procured by Prof.C.Y.Hsieh in 1937 and described by thewriter in 1940 in a paper entitled “Upper Palaeozoic Cephalopods from CentralHunan”.These two collections were secured at two nearby localities in the     

LUDLOVIAN GRAPTOLITE FAUNAS OF THE YANGTZE GORGES DISTRICT AND THEIR STRATIGRAPHICAL SIGNIFICANCE

Ⅰ.INTRODUCTIONThe Silurian stratigraphy of the Yangtze Gorges district has been reportedby various authors since this century.Early in 1924 J.S.Lee and Y.T.Chao subdivided the Silurian of Sintandistrict into two parts—the lower Lungma shale and the upper Sintan forma-tion,thus laying down the fundation of the silurian stratigraphy of China.Inthe following year C.Y.Hsieh and Y.T.Chao went to Lojoping area of I-Chang district and again subdivided the Silurian of that area into three sub-     

中国复叶耳蕨属新分类群(三)

本文报导了复叶耳蕨属4新种:近异羽复叶耳蕨,Arachniodes para-simplicior Ching ex Y.T.Hsieh,sp.nov.;凤阳山复叶耳蕨,Arachniodes fengyangshanensis Ching et C.F.Zhang ex Y.T.Hsieh,sp.nov.;孟连复叶耳蕨Arachniodes menglianensis Y.T.Hsieh.sp.nov.; 披针复叶耳蕨Arachniodes lanceolata Y.T.Hsieh,sp.nov.。     

三种蕨类植物新命名

本文发表了三种蕨类植物新命名,即基羽复叶耳蕨Arachniodes ba-sipinnata(Ching)Ching ex Y.T.Hsieh,stat.nov.;南方复叶耳蕨Arachn-iodes australis Y.T.Hsieh,nom.nov.;湘黔复叶耳蕨Arachniodes michelii(Level.)Ching ex Y.T.Hsieh,comb.nov.。     

四川五加属新分类群

本文发表了四川五加属二新种和一新组合变种,即南坪五加Acan-thopanax nanpingensis X.P.Fang et C.K.Hsieh;宝兴五加A.baoxinensis X.P.Fang et C.K.Hsich和毛叶狭叶五加A.wil-sonii Harms var.pilosulus(Rehd.)X.P.Fang et C.K.Hsieh.     

中国鳞毛蕨科两新种

本文发表了鳞毛蕨科两新种,即川滇假复叶耳蕨Acrorumohra dissecta Chingex Y.T.Hsieh与全缘玉龙蕨Sorolepidium integrilobum Ching ex Y.T.Hsieh     

Light dependency of the photosynthetic recovery of Nostoc flagelliforme

PS II photochemical efficiency (F_v/F_m) of Nostoc flagelliforme was examined after rewetting in order to investigate the light-dependency of its photosynthetic recovery. F_v/F_m was not detected in the dark, but was immediately recognized in the light. Different levels of light irradiation (4, 40 and 400 μmol photon m² s^-1) displayed different effects on the recovery process of photosynthesis. The intermediate level led to the best recovery of photochemical efficiency; the low light required longer and the high light inhibited the extent of the recovered efficiency. It was concluded that the photosynthetic recovery of N. flagelliforme is both light-dependent and influenced by photon flux density. This revised version was published online in June 2006 with corrections to the Cover Date.     

Purification and Characterization of Nitrate Reductase from the Halotolerant Cyanobacterium <Emphasis Type="Italic">Aphanothece halophytica</Emphasis>

Summary Factors affecting the activity of nitrate reductase (E.C.1.7.7.2) from the halotolerant cyanobacterium Aphanothece halophytica were investigated. Cells grown in nitrate-containing medium exhibited higher nitrate reductase activity than cells grown in medium in which nitrate was replaced by glutamine. When ammonium was present in the medium instead of nitrate, the activity of nitrate reductase was virtually non-detectable, albeit with normal cell growth. The enzyme was localized mainly in the cytoplasm. The enzyme was purified 406-fold with a specific activity of 40.6 μmol/min/mg protein. SDS-PAGE revealed a subunit molecular mass of 58 kDa. Gel filtration experiments revealed a native molecular mass of 61 kDa. The K _m value for nitrate was 0.46 mM. Both methyl viologen and ferredoxin could serve as electron donor with K _m values of 4.3 mM and 5.2 μM, respectively. The enzyme was strongly inhibited by sulfhydryl-reactive agents and cyanide. Nitrite, the product of the enzyme reaction, showed little inhibition. Chlorate, the substrate analog, could moderately inhibit the enzyme activity. NaCl up to 200 mM stimulated the activity of the enzyme whereas enzyme inhibition was observed at ≥300 mM NaCl.     

Periphyton growth and diatom community structure in a cooling water pond

Periphyton (Aufwuchs) accumulation was measured on artificial substrates in a pond in central Finland which receives warm cooling-water effluent from a power plant. The growth of periphyton was generally more rapid on the substrates during the first two weeks of colonization near the inflow of the warm water effluent than in the middle of the pond. The maximum accumulation of periphyton was in spring and autumn (dry weight maximum at warm effluent was in spring 3.5 mg DW cm⁻²,2.65 mg AFDW cm⁻²; chlorophyll a maximum 3.96 μg cm⁻² was found in autumn at pond-middle station). During mid-winter months the growth was strongly limited by solar radiation, but the growth was also slow at both stations in the summer months, when the power plant was out of operation. The periphyton accumulation rate was fastest near the water surface and decreased rapidly with increasing depth. A total of 167 diatom species were found in periphyton samples. However, most species were rare; many of the dominants were common to both plankton and periphyton. Species similarity analyses (Jaccard's similarity) between 10 different diatom communities (including periphyton from 9 different types of substrates and phytoplankton) indicated low similarity index values although differences between communities were not significant.     

Species ofAnthostomella from Brunei, includingA. oblongata sp. nov.

Species ofAnthostomella reported from Brunei have been re-examined and the data is summarized in this paper. Five species are accepted, four are synonyms of previously described species and one is a new species. The new speciesAnthostomella oblongata is described and illustrated and a list ofAnthostomella species known from Brunei and a key to these species are provided.     

云南的复叶耳蕨属(Arachniodes Bl.)植物

对云南产复叶耳蕨属植物进行了再次的分类订正研究,确认云南有该属植物20个种类,其中,华南复叶耳蕨Arachniodes festina(Hance)Ching和齿头复叶耳蕨A．aristata(Forst．)Tindale为云南分布新记录;将《中国植物志》等资料中的Acrorumohra dissecta、Arachniodes ailaoshanensis、A．australis、A．austro-yunnanensis、A．caudata、A．chinensis var．cornopteris、A．chinensis var．jinpingensis、A．chingii、A．dayaoensis、A．futeshanensis、A．gongshanensis、A．guangtongensis、A．lushuiensissis、A．pianmaensis,A.pianmaensis、A．pseudo-aristata、A.ppseudo-assamica、A．sshuangbaiensis、A．sinoaristata、A．sporadosora和A．triangularis等20个名称作为新异名处理。还列出了云南产该属植物的分种检索表、名称的处理及分类讨论、地理分布等。     

云南的复叶耳蕨属(ArachniodesBl.)植物

对云南产复叶耳蕨属植物进行了再次的分类订正研究,确认云南有该属植物20个种类,其中,华南复叶耳蕨Arachniodesfestina(Hance)Ching和齿头复叶耳蕨A.aristata(Forst.)Tindale为云南分布新记录;将《中国植物志》等资料中的Acrorumohradissecta、Arachniodesailaoshanensis、A.australis、A.austro-yunnanensis、A.caudata、A.chinensisvar.cornopteris、A.chinensisvar.jinpingensis、A.chingii、A.dayaoensis、A.futeshanen-sis、A.gongshanensis、A.guangtongensis、A.lushuiensis、A.pianmaensis、A.pseudo-aristata、A.pseudo-assa-mica、A.shuangbaiensis、A.sinoaristata、A.sporadosora和A.triangularis等20个名称作为新异名处理。还列出了云南产该属植物的分种检索表、名称的处理及分类讨论、地理分布等。     

Two new species of pyrenomycetous ascomycetes from New Caledonia

Two new species of Pyrenomycetes from forest soil in New Caledonia,Anthostomella pacifica andChaetomium novaecaledonicum, are described and illustrated.Anthostomella pacifica is characterized by non-ostiolate ascomata, cylindrical asci with an amyloid apical apparatus, and two-celled ascospores (dark apical cylindrical and hyaline basal dwarfed cells) with longitudinal germ slits.Chaetomium novae-caledonicum is characterized by ostiolate ascomata, straight terminal hairs, arcuate lateral hairs with a recurved tip, and very small, ovoid-flattened ascospores.This research was supported in part by Monbusho International Scientific Research Program: Field Research, No. 05041093.     

Fungi in Living Symptomless Needles of Pinus sylvestris with Respect to Some Observed Disease Processes

The mycoflora in living symptomless needles of Pinus sylvestris was investigated in three 5–8 year-old plantations in Southern Poland from 1987 to 1990. The needles from trees with symptoms of the autumn needle cast and from trees without such symptoms were treated separately. In total 960 of the current year and 720 of the previous year needles were collected. Fungi were isolated from 80.1 % of needles and 3671 cultures belonging to 86 fungal taxa were obtained. Seven species of fungi showed the rate of infection above 5%: Anthostomella formosa, Lophodermium seditiosum, Cydaneusma minus, Cenangium ferruginosum, Lophodermium pinastri, Sclerophoma pythiophila and Anthostomella pedemontana. The frequency of infection of needles by these species depended on needle age, season of the year, calendar year and site. The spread of fungi in needles was not too high. They were found in 35.8 % of needle sections (isolations were made from 10,080 sections). The needle base, middle and top were infected with more or less similar frequency, but the differences were considerable for the individual fungal species. Anthostomella formosa and A. pedemontana generally occurred slightly more frequently on needles of trees without symptoms of the autumn needle cast, while the other four common species ( Cenangium ferruginosum, Cyclaneusma minus, Lophodermium pinastri, Lophodermium seditiosum ) generally occurred more frequently on needles of trees showing such symptoms. There were considerable differences in this respect among plantations investigated.     

Pandanicola graminella comb. nov. fromFestuca filiformis in the Canary Islands, West Africa

Anthostomella graminella has been re-examined and ascomata were found to be immersed beneath a clypeus. Asci were unitunicate, broad cylindrical, and lacked an apical apparatus, while ascospores were inequilaterally ellipsoidal, 1–2 seriate, brown to light brown and unicellular, with bipolar germ pores. Based on these characters,A. graminella is transferred toPandanicola. An illustration of this species and a tabulated comparison of this species withPandanicola calocarpa is given.     

On the Genus Athyrium Ser. Epiraches Ching et Y. T. Hsieh ex Y. T. Hsieh

This paper,third in the series of an account of the genus Athyrium in China, presents a revision of the series Epiraches Ching et Y．T．Hsieh ex Y．T．Hsieh．A total of 11 species are recognized from China,and more than 20 names are reduced to synonyms in the present paper．Ser．Epiraches is anatural group in Athyrium,it is distinguished from all the other groups of the genus by its Asplenioid sori and indusia,The series is entirely Asian tropical,subtropical and primarily montane．Its northern limits in central and eastern China are not beyond the Yangtze River．Southwestern part and Taiwan of China and Japan Islands are centers of diversity for the series,each with more than five species．Some speciesare disjunctly distributed in southwest China-Taiwan-Japan;one species(Athyrium roseum) occurs discontinuously between Yunnan and Taiwan;one endemic to Hainan(A. hainanense)is the only representative of Athyrium on the island．All members of this series grow in evergreen broad-leaf forests,generally from 500 to 1800 m above sea level．A key to the species,and illustrations of the middle pinnae from different specimens are provided．     

Fungi from rachides of Livistona in the Western Province of Papua New Guinea

Anthostomella livistonicola sp. nov., Apioclypea livistonae gen . et sp. nov ., Astrosphaeriella aosimensis and Macrovalsaria megalospora are described form rachides of Livistona palm. The new species are compared with similar species and all are illustrated with differential interference micrographs. Apioclypea is compared with Apiospora, Clypeosphaena and Pseudomassaria. Macrovalsaria is compared with Kirschsteiniothelia.     

中国蹄盖蕨属轴果蹄盖蕨系的研究

本文是中国蹄盖蕨属植物研究的系列论文的第三篇,对国产轴果蹄盖蕨系植物进行了分类学订正,详细记载了中国产该系植物11种,首次将20余个名称归入该系的一些种下做为异名处理。轴果蹄盖蕨系植物是蹄盖蕨属中自然的一群,以其铁角蕨类型的孢子囊群和囊群益与其它属下类群相区别。本系植物分布于亚洲热带和亚热带山地,常见于山地常绿阔叶林下,海拔500～1800m。在华中和华东地区其分布区北界不超过长江一线。中国西南地区和台湾及日本为该系的三个分化中心。     

国产蹄盖蕨属软刺蹄盖蕨组植物的研究

作者对国产蹄盖蕨属软刺蹄盖蕨组植物从形态分类和地理分布上进行了研究,共计载了23种。其中Athyrium densisorum,A.medogense和A.chingianum为新种,A.paranigripes为一新名称。文中还附有分类检索表,每种都有文献、异名和标本引证及地理分布。