贵州省瓶霉属二新种(英文)

在对贵州省土壤暗色丝孢真菌进行调查研究中,分离获得2个瓶霉属新种:土壤瓶霉Phialophora subterranea和光滑瓶霉P.levis,对二者进行了详细的描述并绘图。研究菌株的干制培养物及活菌种均存放在贵州大学植物病理学标本室(HGUP)。     

贵州省腐殖霉属两新种

报道了贵州省腐殖霉属Humicola Traaen真菌的两个新种:贵州腐殖霉Humicola guizhouensis和土栖腐殖霉H.terrestris,对二者进行了详细的描述并照相。两种均分离自贵州省贵阳市土壤。研究菌株的干制培养物标本与活菌种存放在贵州大学植物病理学标本室(HGUP)。     

Two new diterpenoids from Plectranthus species

Two new diterpenoids, ent-7α-acetoxy-15-beyeren-18-oic acid and (13S,15S)-6β,7α,12α,19-tetrahydroxy-13β,16-cyclo-8-abietene-11,14-dione, have been isolated from Plectranthus saccatus and Plectranthus porcatus, respectively, and their structures were established by 1D and 2D NMR spectroscopic studies. The new diterpenes showed no activity against Gram-negative bacteria and Candida albicans (yeast strain). Among Gram-positive bacteria, the lower MIC value was 62.50 μg/ml for the abietane derivative against Staphylococcus aureus ATCC 6538.     

Two new species of Palmae from Colombia

Chamaedorea macroloba Galeano andPrestoea simplicifolia Galeano, known only from Colombia, are described and illustrated.     

Two new species of Parmelina from India

Parmelina chozoubae and P. nagalandica are described on the basis of collections made from Nagaland, India.     

Two new species of Distichophyllum from Malaya

Abstract

The germination and establishment abilities of different types of propagules under natural conditions is an area in bryophyte reproductive biology that is largely unknown. In some species gametophyte fragments, rather than spores, may be primarily responsible for establishment of new colonies in nature, and the presence of other mosses may have an effect on establishment processes. These ideas were tested experimentally using four species of Tortula grown in a glasshouse under semi-natural conditions. The relative germination and growth abilities of spores and gametophytic fragments were tested under each combination of the following treatments: (1) continuous hydration (using a mist system), or periodic drying; (2) substrate of bare sand, a clump of Dicranum scoparium, or (for spores only) the clump of Tortula from which sporophytes were taken. Fragments produced new shoots much more quickly than spores under either hydration condition but spores germinated at a higher rate. Germination rates of both spores and fragments were greatly reduced (usually to zero) in clumps of Tortula or Dicranum under either hydration condition. Some differences between species were noted. In a further experiment filter-sterilized water extracts of each species were applied to spores on agar. Again, strong effects on spore germination and protonemal growth were noted. Patterns of inhibition differed between species and reflected those found in the previous experiment, indicating that the inhibition effect may be due to a water soluble chemical rather than the physical properties of the moss clumps. These studies present the first experimental evidence for the chemical inhibition of spores by mature plants. When taken together with previous reports of chemical interactions among protonemal systems, considerable ecological significance of these results is suggested.     

中国玉兰属两新种

描述了中国木兰科玉兰属两新种,奇叶玉兰(Yulania mirifolia D.L.Fu,T B Zhao etZ.X.Chen,sp.nov.)和青皮玉兰(Yulania viridula D.L.Fu,T B Zhao et G.H.Tian,sp.nov.)的形态特征和分布情况,并与近缘种进行了比较。     

Two new species of Patellaria from India

Summary The paper deals with two new species ofPatellaria i.e.,Patellaria lantanae sp. nov. onLantana camara L. andPatellaria ipomoeae sp. nov. onIpomoea sp.Phoenix sylvestris Roxb. andAcacia arabica Willd. constitute new host records for the above species.     

Two new species of Solicorynespora from Spain

Solicorynespora insolita sp. nov. and Solicory-nespora biseptata sp. nov., collected from plant debris in natural areas of Spain, are described and illustrated. The former species is characterized by obclavate to fusiform, 4- to 7-septate, dark brown conidia, with a mucous tunica at the apex; sometimes with an unusual oblong to bacilliform, hyaline, phialidic conidial synanamorph arising from the apical cell. Analysis of D1/D2 region rDNA sequences revealed that this fungus is related to members of the family Kirschsteiniotheliaceae of the Dothideomycetes. Solicorynespora biseptata is distinguished by obclavate, 2-septate, brown, but pale brown at the apex, smooth conidia. This latter fungus did not grow in culture. A key to species of Solicorynespora is provided.     

Two new species of Amanita from Japan

 Two new species from Japan, Amanita areolata and Amanita griseoturcosa, are described. The former, found in a broad-leaved forest in Aichi Prefecture, is a medium- to large-sized mushroom characterized by an areolate, brownish pileus, a nonstriate and appendiculate margin of the pileus, and amyloid basidiospores. The latter, found in forests with Fagaceae or Pinaceae in Tokyo, Chiba Prefecture, and Miyagi Prefecture, is a medium-sized mushroom characterized by a grayish-turquoise pileus, a nonstriate margin of the pileus, a saccate volva, an apical membranous annulus, and amyloid basidiospores. Received: July 10, 2001 / Accepted: June 5, 2002