Occurrence in Korea of Rust Disease on Tilia mandshurica Caused by Pucciniastrum tiliae

Jae Sung Lee¹ Ji Hyun Park¹ Young Joon Choi^1,* Hyeon Dong Shin³

¹Department of Biological Science, Kunsan National University, Gunsan 54150, Korea
²Department of Forestry, Environment, and Systems, Kookmin University, Seoul 02707, Korea
³Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea

Abstract

Tilia mandshurica trees with rust symptoms have consistently been noticed during disease surveys in Korea since 2006. Based on the morphological examination and molecular sequence analysis of the internal transcribed spacer and large subunit of ribosomal DNA, Pucciniastrum tiliae was identified as the causal fungus of rust disease. This is the first report of P. tiliae infection on T. mandshurica in Korea.

Figures & Tables

Fig. 1. Rust disease caused by on Tilia mandshurica . (A) Early defoliation of an affected tree. (B and C) Rust symptoms on the lower surface of leaves. (D) Uredinia formed on the lower surface of a leaf. (E) Uredinium under a differential interference contrast (DIC) microscope. (F and G) Urediniospores under a DIC microscope. (H) Uredinium under a scanning electron microscope (SEM). (I and J) Urediniospores under a SEM. (K) Vertical section of telium (abs, abaxial side; ads, adaxial side). (L) Teliospores in a leaf epidermis.