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DOI: 10.3852/08-221
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Mycologia, 101(6), 2009, pp. 790-809.
© 2009 by The Mycological Society of America

The rust fungus Gymnosporangium in Korea including two new species, G. monticola and G. unicorne


Hye Young Yun 1

     Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-921, Republic of Korea

Soon Gyu Hong 2

     Biological Resource Center, Korea Institute of Bioscience and Biotechnology, 52 Oun-dong, Yusong-ku, Daejeon 305-806, Republic of Korea

Amy Y. Rossman

     Systematic Mycology and Microbiology Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705

Seung Kyu Lee

     Southern Forest Research Center, Korea Forest Research Institute, 719-1 Gazwa-dong, Jinju City Kyungsangnam-Do, 660-300, Republic of Korea

Kyung Joon Lee

     Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-921, Republic of Korea

Kyung Sook Bae 3

     Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, 52 Oun-dong, Yusong-ku, Daejeon 305-806, Republic of Korea

A survey was conducted of the rust fungus Gymnosporangium in Korea. We recollected previously known species, namely Gymnosporangium asiaticum, G. clavariiforme, G. globosum, G. japonicum and G. yamadae. Gymnosporangium nidus-avis and G. sabinae are reported for the first time from Korea, and two new species, G. monticola sp. nov. and G. unicorne sp. nov., are recognized. Previous single reports of G. miyabei and G. shiraianum could not be confirmed. The LSU rDNA was sequenced from freshly collected specimens. Phylogenetic analyses show that species of Gymnosporangium form a monophyletic group with strong bootstrap support within the rust fungi. The two new species are unique based on both A and B molecular as well as morphological characteristics. Analyses of phenotypic characters mapped onto the phylogenetic tree show that teliospore length followed by telia shape and telia length are conserved; these are morphological characters useful in differentiating species of Gymnosporangium. Each of the nine species of Gymnosporangium in Korea is described and illustrated, and keys based on aecia and telia stages are provided. Lectotype specimens for several names described in Gymnosporangium are designated.

Key words: aecia stage, forest pathogens, LSU rDNA, Pucciniales, systematics, telia stage

3 Corresponding author. E-mail: ksbae{at}kribb.re.k






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Copyright © 2009 by The Mycological Society of America.