【作者】 陈江琳； 林英任； 侯成林； 刘艳兵；

【Author】 CHEN JiangLin~1 LIN YingRen~(1,2*) HOU ChengLin~(3*) Liu YanBing~2 (1 School of Life Sciences,Anhui Agricultural University,Hefei 230036,China;2 School of Forestry & Landscape Architecture,Anhui Agricultural University,Hefei 230036,China; 3 College of Life Science,Capital Normal University,Beijing 100048,China)

【机构】 安徽农业大学生命科学学院； 安徽农业大学林学与园林学院； 首都师范大学生命科学学院；

【摘要】 <正>A new species was found on Camellia sinensis from Mt Guniujiang,Anhui Province, China,and is described as follows: Lophodermium sinensis Y.R.Lin,C.L.Hou & J.L.Chen sp.nov. Ascomata on both sides of fallen leaves,scattered,seldom two confluent,in subround to irregular,4-15 mm diam.,fulvous bleached areas with unconspicuous edges.In surface view, ascomata black,slightly shiny,elliptical,(290-)400-730×(150-)220-290μm,with a clear outline;sometimes one or both ends of the ascomata grey-brown,with a dark brown perimeter line;straight or slightly curved to a side,one or two branched and became 3-lobed or triangular, ends rounded to subacute or slightly acute,moderately raising above the surface of the substrate at maturity,opening by a single longitudinal split to expose the fawn apexes of the hymenium, the split extending along 4/5-5/5 of the length of an ascoma.Lips absent.In median vertical section,ascoma partly intraepidermal,140-210μm deep,more than 4 displaced epidermal cells are scattered along the base of the ascoma.Covering stroma 14-23μm thick near the center of the ascomata,slightly thicker towards the edges,extending to the basal stroma,mainly consisting of dark brown,thick-walled,textura angularis and globulosa with cells of 2-5μm diam..Lips absent,but several hyaline thin-walled cells closely adhering to the lower area of the covering stroma near the opening which strongly carbonized.Basal stroma 10-22μm thick,dark brown, consisting of 2-3 rows of 2.5-5.5μm diam.,thick-walled,angular and globular cells. Subhymenium slightly concave or nearly flattened,12-20μm thick,composed of hyaline textura angularis and porrecta,with a region composed of 4-7μm diam.,lightly thick-walled,light grey-brown,angular cells at the edge of the ascoma.Paraphyses hyaline,filiform,extending 15-25μm beyond asci,1-1.4μm wide,with a thin gelatinous matrix,usually swollen near the apex,and the tips gradually swelling to 2-3μm diam.globules,forming distinct epithecium with 10-22μm thick above asci.Asci ripening sequentially,65-100×4-6μm,cylindrical,thin-walled and equal,apex rounded or subacute,short stalk,J,8-spored.Ascospores borne in a fascicle, sometimes helically arranged more or less,50-85×1-1.5μm,filiform,slightly tapered towards the ends,hyaline,aseptate,thin-walled,covered by a ca.1μm thick gelatinous sheath. Conidiomata on both sides of leaves,scattered to crowded,occasionally coalescing.In surface view,conidiomata grey-brown to dark brown,subrotund or incompletely orbicular, 90-170μm diam.,somewhat raising the leaf surface,opening by a 10-15μm diam.ostiole to discharge spores,the edge defined.In vertical section,conidiomata 30-55μm deep,lenticular in outline,subcuticular.Upper wall so poorly developed that it is only present in surrounding of the ostiole.Basal wall poorly developed.5-8μm thick,dark brown,consisting of ca.2 rows of thick-walled,angular cells.Conidiogenous cells and conidia not observed. Zone lines absent. On fallen leaves of Camellia sinensis(L.) Kuntze,Dayan,Mt Guniujiang,Anhui Prov., China,10 July 2006,Y.R.Lin et al.L2103(AAUF 68211,Type).更多还原

【Abstract】 A new species was found on Camellia sinensis from Mt Guniujiang,Anhui Province, China,and is described as follows: Lophodermium sinensis Y.R.Lin,C.L.Hou & J.L.Chen sp.nov. Ascomata on both sides of fallen leaves,scattered,seldom two confluent,in subround to irregular,4-15 mm diam.,fulvous bleached areas with unconspicuous edges.In surface view, ascomata black,slightly shiny,elliptical,(290-)400-730×(150-)220-290μm,with a clear outline;sometimes one or both ends of the ascomata grey-brown,with a dark brown perimeter line;straight or slightly curved to a side,one or two branched and became 3-lobed or triangular, ends rounded to subacute or slightly acute,moderately raising above the surface of the substrate at maturity,opening by a single longitudinal split to expose the fawn apexes of the hymenium, the split extending along 4/5-5/5 of the length of an ascoma.Lips absent.In median vertical section,ascoma partly intraepidermal,140-210μm deep,more than 4 displaced epidermal cells are scattered along the base of the ascoma.Covering stroma 14-23μm thick near the center of the ascomata,slightly thicker towards the edges,extending to the basal stroma,mainly consisting of dark brown,thick-walled,textura angularis and globulosa with cells of 2-5μm diam..Lips absent,but several hyaline thin-walled cells closely adhering to the lower area of the covering stroma near the opening which strongly carbonized.Basal stroma 10-22μm thick,dark brown, consisting of 2-3 rows of 2.5-5.5μm diam.,thick-walled,angular and globular cells. Subhymenium slightly concave or nearly flattened,12-20μm thick,composed of hyaline textura angularis and porrecta,with a region composed of 4-7μm diam.,lightly thick-walled,light grey-brown,angular cells at the edge of the ascoma.Paraphyses hyaline,filiform,extending 15-25μm beyond asci,1-1.4μm wide,with a thin gelatinous matrix,usually swollen near the apex,and the tips gradually swelling to 2-3μm diam.globules,forming distinct epithecium with 10-22μm thick above asci.Asci ripening sequentially,65-100×4-6μm,cylindrical,thin-walled and equal,apex rounded or subacute,short stalk,J,8-spored.Ascospores borne in a fascicle, sometimes helically arranged more or less,50-85×1-1.5μm,filiform,slightly tapered towards the ends,hyaline,aseptate,thin-walled,covered by a ca.1μm thick gelatinous sheath. Conidiomata on both sides of leaves,scattered to crowded,occasionally coalescing.In surface view,conidiomata grey-brown to dark brown,subrotund or incompletely orbicular, 90-170μm diam.,somewhat raising the leaf surface,opening by a 10-15μm diam.ostiole to discharge spores,the edge defined.In vertical section,conidiomata 30-55μm deep,lenticular in outline,subcuticular.Upper wall so poorly developed that it is only present in surrounding of the ostiole.Basal wall poorly developed.5-8μm thick,dark brown,consisting of ca.2 rows of thick-walled,angular cells.Conidiogenous cells and conidia not observed. Zone lines absent. On fallen leaves of Camellia sinensis(L.) Kuntze,Dayan,Mt Guniujiang,Anhui Prov., China,10 July 2006,Y.R.Lin et al.L2103(AAUF 68211,Type).更多还原