Quantitative RT-PCR assay for the transcription levels of three ESTs with significant homologies to fungal genes in the compatible interactions of wheat- Puccinia striiformis f. sp. tritici and urediniospores. RNA derived from compatible (wheat cultivar Suwon 11 inoculated with CYR31) interaction was extracted from infected wheat leaves harvested at 0, 6, 24, 48, 72, 120, 168, 192 hpi and urediniospores. The Y ax of the figure shows relative expressions of three fungal homologues genes compared with the mean expression level of the mock treatment. The mock values for compatible interactions are mean values for all time-points as there is no significant difference among the different time points. S, urediniospores.