1. Graduate School of Bioagricultural Sciences; Nagoya University; Furo, Chikusa Nagoya 464-8601 Japan
2. Department of Forest and Soil Sciences, Boku; University of Natural Resources and Life Sciences; Vienna Austria
3. Department of Biological Sciences; University of Notre Dame; Galvin Life Science Building Notre Dame IN 46556 USA
4. Institute of Silviculture and Forest Protection, University of West Hungary; Sopron H-9400 Hungary