黑蛋巢菌属的新种、新变种及国内新记录

本文报道黑蛋巢菌属Cyathus Haller:Pers.一新种——潞西黑蛋巢Cyathus luxiensis T.X.Zhou,J.Yu et Y.H.Chen,一新变种——非洲黑蛋巢宽孢变种Cyathus africanus H.J.Brodie var.latisporus Y.H.Chen et J.Yu 和一新记录型——壶黑蛋巢布诺德变型Cyathus olla (Batch) Pers .f. brodiensis Shinners et Tewari。给出了每个分类单元的宏观、微观特征图。新种、新变种的模式标本保存于西南林学院真菌标本室(MHSFC)。     

弯孢属一新名称和一新变种

报道弯孢属一新名称厚隔弯孢Curvulariacrassiseptum和生于莴苣LactucasativaL.上的一新变种厚隔弯孢莴苣变种Curvulariacrassiseptumvar.lactucae。模式标本保藏于山东农业大学植物病理标本室(HSAUP)。     

粉褶蕈属一新亚属和一新种

本文描述了粉褶蕈属Entoloma 1个具有被结晶囊状体的特殊新种,并为此建立了1个新亚属。新亚属为结晶囊粉褶蕈亚属Metuloidoentoloma,新种为结晶囊粉褶蕈Entoloma metuloideum。文中有上述新亚属及新种的拉丁文及英文描述。模式标本(HMIGD 18773)采于广东省南岭国家级自然保护区,保藏于广东省微生物研究所真菌标本室(HMIGD)内。     

球针壳属一新种和一新组合

本文报道了球针壳属(Phyllactinia)的一个新种和一个新组合,即寄生于杜鹃花科(Ericaceae)吊钟花属(ENkianthus)灯笼花(E.chinensis Franch)上的灯笼花球针壳(Phyllactiniaenkianthi z.y. zhao sp. nov.)和寄生于茶藨子科(Grossulariaceae)茶藨子(Ribes sp.)上的茶藨子球针壳(Phyllactinia ribesii(Jacz.)z. y. zhao comb. nov.)。上述新分类单位均有汉文和拉丁文描述,新分类单位与近似种有汉文讨论。     

KINETICS OF A DRUG SENSITIVE CLONE OF HeLa CELLS

Drug sensitive clones have been isolated from a population of HeLa cells after treatment with methyl methane sulphonate (MMS). One of these clones has now been studied in more detail and some possible mechanisms of drug sensitivity have been related to the proliferation kinetics of the cells of this clone. The cell cycle is elongated and labelling techniques show this elongation to be confined to the G₁ phase. Synchronized cultures have shown that the G₁ phase is more sensitive to MMS than the S phase. These observations provide some explanation for the drug sensitivity of this clone of cells.