中国菌刺孢属一新记录种——槭菌刺孢

近年来,辽宁省东部山区种植的珍贵药用植物——辽细辛Asarum heterotropoides Fr. Schmidtvar. mandshuricum(Maxim.)Kitag.上,发生一种新的毁灭性病害——细辛叶枯病,迄今国内外尚未见报道。自1990年以来,作者从辽宁细辛主产区采集细辛叶枯病标本,经鉴定确认为槭菌刺孢Mycocentrospora acerina(Hartig)Deighton。该菌国内迄今未见报道,是我国真菌的一个新记录种。     

中国斑褶菇属一新记录种——双孢斑褶菇

斑褶菇属Panaeolus是世界著名的有毒担子菌,属蘑菇目(Agaricales)球盖菇科(Strophariacesa),迄今中国文献已经报道15种(贺新生,2001).本文报道我国该属的一个新记录种.     

中国一新记录属--贝尔特孢属

贝尔特孢属Beltrania O. Penzig, 1882, Nuovo G. Bot. Ital., 14:72. 菌落铺展型,绒毛状,褐色至黑色。菌丝体埋生或部分表生。通常有子座,常生于寄主表皮下。刚毛从扁平、辐射状瓣裂的基细胞上长出,不分枝,深色,光滑或具疣突,壁厚。无附着枝。分生孢子梗与菌丝有明显区别通常单生,直立或弯曲,淡青黄色至褐色,光滑,有隔膜,顶部较粗大,至顶端颜色渐淡,自刚毛的基细胞上或分离的辐射状瓣裂的细胞上生出。产孢细胞合生,顶生,全壁多芽生产孢,合轴式延伸;棒状,柱状或齿状,齿突圆柱形。分离细胞膨大。分生孢子单生,顶侧生…     

疣孢斑褶菇属一新记录种——小孢疣孢斑褶菇

Panaeolina Maire, Meded. Proefstn W. Java, Kagok-tegal 15:109 [S閞.Bot.no.2] (1933) 疣孢斑褶菇属,模式种为:Panaeolina foenisecii (Pers.:Fr.) Maire。本属外观酷似Panaeolus,但斑褶菇属孢子光滑,本属孢子深紫褐色,孢子壁有明显疣状突起;也认为近似Psathrella,但本属菌褶明显花斑状。全球报道有6个种(Sathe & Daniel, 1980; Gerhardt,1996; Guzman et al ,2000),中国文献只报道了1种(臧穆等,1996)。本文报道该属的一个中国新记录种。 小孢疣孢斑褶菇 图1 Panaeolina microsperma Natarajan & Raman, Bibl. Mycol. 8…     

Laccase isoforms with unusual properties from the basidiomycete Steccherinum ochraceum strain 1833

Aims: To isolate and characterize the laccase isoforms from S. ochraceum 1833 – a new active producer of high extracellular laccase activity. Methods and Results: Three laccase isoforms (laccases I, II and III) with 57·5, 59·5 and 63 kDa molecular masses respectively were purified from S. ochraceum 1833 and in contrast to the known laccases had strongly pronounced absorption at 611 nm with molar extinction coefficients ranging from 7170 to 7830 mol^?1 l cm^?1. All isoforms showed maximal activity with ABTS at low pH (≤2) and temperatures in the range 70–80°C, were stable for long time of incubation at high temperature (60–80°C) and at pH values ranging from 2 to 6. Laccase II showed a higher activity and wider substrate specificity. N‐terminal amino acid sequence analysis of the purified laccase II (VQIGPVTDLH) showed 80% identity with the N‐terminal amino acid sequence of laccase from Lentinula edodes [Appl Microbiol Biotechnol 60 (2002) 327]. Conclusions: Elevated temperature optima, high thermo‐ and pH‐stabilities, the broad substrate specificity of the isoforms make the laccases from S. ochraceum 1833 a suitable model for biotechnological processes proceeding at high temperatures. Significance and Impact of the Study: For the first time, new basidiomycete strain S. ochraceum was reported as a producer of novel thermostable, pH stable, acidophilic laccases with unusual spectral properties.     

Serological relationships among Sophoreae, Thermopsideae and Genisteae (Fabaceae)

A comparison among 20 genera, representatives of Sophoreae, Thermopsideae and Genisteae based on the serological cross reactivity of the seed proteins, indicates: (a) Sophoreae are highly heterogeneous – there is little similarity among genera of the New World, genera of tropical austral Africa, and genera of temperate Eurasia; (b) Sophora and Maackia are strictly related both to Thermopsidae and to Genisteae; (c) Thermopsideae are not intermediate between Sophoreae and Genisteae; (d) Primitive Thermopsideae and Genisteae (Anagyris, Hesperolaburnum) are serologically related among themselves and to the Sophoreae; (e) derived herbaceous genera (Baptisia, Lupinus) are serologically divergent.     

Revision of the Genus Paratylenchus Micoletzky, 1922, and Descriptions of New Species. Part I of 3 Parts

A revision of part of the genus Paratylenchus is reported covering those species with stylets averaging < 22 μm. Thirteen new species are described and further observations are given on the morphology and relationships of nine other species. Paratylenchus gahriciis transferred to the genus Hemicriconemoides. This article is the first of three parts: the second will treat Paratylenchus spp. with stylets averaging 24-40 μm (and include a key to the species described in parts 1 and2), the third will include species with stylets >40μm, respectively.