Microsoft Word - S-3. SS -F.doc Bangladesh J. Plant Taxon. 15(2): 163-165, 2008 (December) © 2008 Bangladesh Association of Plant Taxonomists - Short communication GIBBERELLA ZEAE (SCHW.) PETCH - A NEW RECORD OF ASCOMYCETOUS FUNGUS FOR BANGLADESH SHAMIM SHAMSI1 AND RAZIA SULTANA Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh Keywords: Gibberella zeae, Ascomycetes, Bangladesh Gibberella zeae (Schw.) Petch, the teleomorph of Fusarium graminearum Schwabe, has been described and illustrated in the present paper as a new Ascomycetes record for Bangladesh. Gibberella zeae causes a good number of diseases on various graminaceous as well as non-graminaceous host plants. Perithecial stage of G. zeae was earlier recorded on Arrhenatherum, Avena, Glyceria, Hordeum, Phragmites and Triticum (Ellis and Ellis 1985). Recently, the authors recorded G. zeae on two jute species, namely Corchorus capsularis L. and C. olitorius L. from Bangladesh. Jute is therefore a new host record of the fungus. Numerous perithecia of G. zeae were found on dried stems and fruits of jute along with pycnidia of Macrophomina phaseolina (Tassi) Goid., Botryodiplodia theobromae Pat. and Cercospora corchori Sawada. Gibberella zeae was isolated following “streaking” method (CAB 1968) on PDA medium (potato dextrose agar medium), but the fungus did not produce conidia or perithecia in culture. Microscopic details of the fungus were made from freshly collected samples of infected stems and fruits of Corchorus capsularis and C. olitorius. Species determination was made following Booth (1971) and Ellis and Ellis (1985). Gibberella zeae (Schw.) Petch, Annls mycol. 34: 260, 1936. (Plates 1, 2) Colony grayish on PDA medium at temperature between 22º and 28ºC and pH 6. Hyphae grayish. Perithecia with an outer stromatic wall of 16-18 µm width, clustered around the lower nodes and basal parts of the infected stems and fruits, 145-200 µm in diameter, black, violet or bluish grey in transmitted light. Asci 65-82 9-12 µm, 8- spored. Ascospores pale straw-coloured, curved, fusoid, but with rounded ends, 3-septate, 16.5-27.5 3.5-5.0 µm. Specimens examined: On stems and fruits of Corchorus capsularis, Botanical Garden, Curzon Hall Campus, University of Dhaka, Dhaka, S. Shamsi 2075, 4 December 2007; on stems and fruits of C. olitorius, Botanical Garden, Curzon Hall Campus, University of Dhaka, Dhaka, S. Shamsi 2095, 19 February 2008. 1Corresponding author. E-mail: prof.shamsi@gmail.com 164 SHAMSI AND SULTANA GIBBERELLA ZEAE (SCHW.) PETCH 165 Acknowledgements The authors express their sincere thanks and gratitude to Prof. A.Z.M. Nowsher Ali Khan, Department of Botany, University of Dhaka for his valuable comments and suggestions on the manuscript. References Booth, C. 1971. The Genus Fusarium. The Commonwealth Mycological Institute, Kew, Surrey, England, pp. 179-182. CAB (Commonwealth Agricultural Bureau) 1968. Plant Pathologist’s Pocket Book. The Commonwealth Mycological Institute, Kew, Surrey, England, pp. 1-267. Ellis, M.B. and Ellis, J.P. 1985. Microfungi on Land Plants. Biddles Ltd., Guildford and Kings Lynn, Great Britain, pp. 1-818. (Manuscript received on 18 March 2008; revised on 4 December 2008)