Mycologia
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DOI: 10.3852/mycologia.98.1.31
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Mycologia, 98(1), 2006, pp. 31-42.
© 2006 by The Mycological Society of America

Penicillium species endophytic in coffee plants and ochratoxin A production


Fernando E. Vega 1
Francisco Posada

     Insect Biocontrol Laboratory, U.S. Department of Agriculture, Agricultural Research Service, Bldg. 011A, BARC-W, Beltsville, Maryland 20705

Stephen W. Peterson

     Microbial Genomics and Bioprocessing Research Unit, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Agricultural Research Service, 1815 N. University St., Peoria, Illinois 61604

Thomas J. Gianfagna
Fabio Chaves

     Department of Biology and Pathology, Rutgers The State University of New Jersey, 59 Dudley Road, New Brunswick, New Jersey 08903

Tissues from Coffea arabica, C. congensis, C. dewevrei and C. liberica collected in Colombia, Hawaii and at a local plant nursery in Maryland were sampled for the presence of fungal endophytes. Surface sterilized tissues including roots, leaves, stems and various berry parts were plated on yeast-malt agar. DNA was extracted from a set of isolates visually recognized as Penicillium, and the internal transcribed spacer region and partial LSU-rDNA was amplified and sequenced. Comparison of DNA sequences with GenBank and unpublished sequences revealed the presence of 11 known Penicillium species: P. brevicompactum, P. brocae, P. cecidicola, P. citrinum, P. coffeae, P. crustosum, P. janthinellum, P. olsonii, P. oxalicum, P. sclerotiorum and P. steckii as well as two possibly undescribed species near P. diversum and P. roseopurpureum. Ochratoxin A was produced by only four isolates, one isolate each of P. brevicompactum, P. crustosum, P. olsonii and P. oxalicum. The role these endophytes play in the biology of the coffee plant remains enigmatic.

Key words: Coffea arabica, Coffea congensis, Coffea dewevrei, Coffea liberica, endophytes, OTA

1 Corresponding author. E-mail: vegaf{at}ba.ars.usda.gov




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