Two Undescribed Species of Pseudocercospora Speg. from India Singh D.P., Mall T.P.* Postgraduate, Department of Botany, Kisan P.G. College, Bahraich-271 801 *E-mail: drtpmall@rediffmail.com
Online published on 23 May, 2013. Abstract This communication deales with the descriptions and illustrations of undescribed species of fungus genus Pseudocercospora viz; P.caseariae Singh and Mall sp. nov. on Casearia tomentosa (Symadaceae) and P. zizyphii on Zizyphus sp. (Rhamnaceae) collected from North Western Tarai Forests of U.P. P. Caseariae is characterized by infection spots hypogenous, subcircular to circulare, upto 5 mm in diam in descrete patches in begning becoming effuse later on. Colonies effuse, tuftedmidto dark brown. Mycelium immersed. Stromata present, fascicles 27-37mm in diam. Conidiophores macronematous, synnematous, individual threads unbranched, generally flexuous, often narrow cylindrical adpressed near the base, somewhat towards the apex, olivaceous brown to light brown, smooth, 18-37 x 5-6 mm in diam. Conidiogenous cells integrated, terminal, often monoblastic and percurrent becoming polyblastic later on; sympodial and denticulate broad conidial denticles and no scars or thin scars. Conidia solitary, simple acrogenous on young conidiophores becoming acropleugenous later on, mostly cylindrical smooth or rugulose, straight to curved, apex obtuse, base obconico-cylindrical with numerous transverse septa, 29-68 x 3.5-5 mm in diam, hilum unthickened. P. zizyphii in characterized by infection spots amphigenous, subcircular to circular, upto 7 mm in diam; in desrete pathches in beginning becoming effuse later on. Colonies effuse, tufted mid to dark brown. Mycelium immersed. Stromata present, fascicles upto 37mm indiam. Coniodiophors macronematous, synnematous individual threads unbranched generally flexuous often narrow. Conidiogenous cells integrated, terminal often monoblastic, rarely polyblastic, sympodial scars thin. Conidia solitary, rarely catenate, simple on young acropleurogenous, mostly cylindrical, smooth, apex obtuse, base obconico-cylindrical with numerous transverse eusepta (generally) (3-9), 13-77x 3-5 mm in diam; hilum unthickened. Top Keywords Foliicolous fungi, Pseudocercospora, species novel. Top |