The present work formed part of a research project supported by the General Directorate of State Forests (Grants BLP-333 and BLP-384). We gratefully acknowledge the Forest Guard staff from Śnieżka Forest District for their efficient cooperation. We also thank Małgorzata Gorzkowska from the Laboratory of Molecular Biology FRI Poland, who assisted with processing of plant material in the laboratory.Peer reviewedPublisher PD
