Allelopathic effects of some tree leaf extracts on seed germination and seedling growth of Turf grasses

Terzi I., KOCAÇALIŞKAN İ., Demir Y.

Journal of Environmental Protection and Ecology, vol.14, no.3 A, pp.1236-1243, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 3 A
  • Publication Date: 2013
  • Journal Name: Journal of Environmental Protection and Ecology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1236-1243
  • Keywords: Allelopathic effects, Leaf extract, Seed germination, Shoot elongation, Tree species
  • Yıldız Technical University Affiliated: Yes


Allelopathic effects of aqueous leaf extracts of 10, 20, 30, 40 and 50 g/l six tree species (Juglans regia, Quercus cerris, Populus tremula, Pinus nigra, Platanus orientalis and Salix alba) on seed germination and seedling growth of 2 turf species were investigated. All the extracts tested had generally inhibitory effects on seed germination of turf species Lolium perenne and Festuca arundinacea as compared with control. This inhibition effect increased with increasing extract concentrations. Seed germination was less affected than root and shoot elongation in all species. However, 10 g/l treatment of Populus tremula, Pinus nigra and Platanus orientalis promoted root and shoot elongation of turf species. These results indicate that some tree leaves (Juglans regia and Salix alba) contain water-soluble allelochemicals which have more inhibitory effect than other species on turf species.