Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland? |
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| Institution: | 1. State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China;2. Qinghai Academy of Animal and Veterinary Medicine, Xining 810016, China;3. Management and Production of Renewable Resources, Natural Resources Institute Finland (Luke), Itäinen Pitkäkatu 3, Turku 20520, Finland;1. Department of Electronic Engineering, Hanyang University, Seoul 133-791, South Korea;2. Department of Electronic and Computer Engineering, Hanyang University, Seoul, South Korea;1. Sher-E-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar, 190025 Srinagar, Jammu and Kashmir, India;2. Division of Veterinary Medicine, Indian Veterinary Research Institute Izatnagar, Bareilly, U.P. - 243122, India;3. Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Madhavaram Milk Colony, Chennai, Tamil Nadu - 600051, India;4. Division of Avian Physiology and Reproduction, ICAR-Central Avian Research Institute, Izatnagar, Bareilly, U.P. - 243122, India;5. Department of Biochemistry & Genetics, Barkatullah University, Bhopal-462026, M.P., India;6. Division of Pathology, Indian Veterinary Research Institute Izatnagar, Bareilly, U.P. - 243122, India;7. Division of Molecular Bioprospection, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow-226015, Uttar Pradesh, India;8. Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt;9. Forensic Medicine and Toxicology Department, Veterinary Medicine Faculty, Zagazig University, Zagazig - 44511, Egypt;1. Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal;2. IMAR – Institute of Marine Research, MARE – Marine and Environmental Sciences Centre, Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal |
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| Abstract: | Allelopathic effects and plant associated systemic endophytic fungi are often thought to play a role in the invasion of exotic plant species. Here, we tested the inhibitory effects of the aqueous extracts of the hemiparasitic weed Pedicularis kansuensis on seed germination and seedling growth of endophyte-free (E?) and -infected (E+) grass species, Stipa purpurea and Elymus tangutorum. The weed extracts significantly inhibited both seed germination and seedling growth of the target grass species. Extracts from the inflorescences gave greater inhibition than those from the stems or roots, while the concentration of the extract had a direct effect on the extent of inhibition. The E+ target plants were less susceptible to the extracts than their E-counterparts. Our results suggest that the allelopathic potential of P. kansuensis will lead to increased frequencies of endophyte infected plants in grass populations. |
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| Keywords: | Allelopathy Degraded grassland Endophyte symbiosis Invasion |
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