Abstract
The spatial structure of the environment is known to affect ecological processes. Unlike the spatial structure of negative interactions, such as competition and predation, the role of spatial structure in positive interaction has received less attention. We tested how the spatial structure of spores of ectomycorrhizal fungi (EMF) in the soil affects the growth of Aleppo pine (Pinus halepensis) seedlings. Spores were spatially distributed at four different levels of patchiness (1 patch, 4 patches, 8 patches and complete mixing) in 4 L pots (all pots received the same total amount of spores). Based on previous findings, we hypothesized that plant performance would gradually increase from the single patch treatment to the complete mixing. However, we found a non-linear response to patchiness. Specifically, plants were largest in the single patch and complete mixing while those in the 4 and 8 patch treatments were the smallest. This non-monotonic response, which might be the result of spatially determined colonization timing or community composition, suggests that the spatial structure of EMF spores has a complex effect on seedling growth.
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Sequences were submitted to the National Center for Biotechnology Information Sequence Read Archive with the accession codes: Bioproject PRJNA699879.
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Acknowledgements
The authors wish to thank Ofer Ovadia for the ability to use his lab facilities and for his guidance and mentoring, Maren Hale and Liliam Montoya for their technical assistance, Rachel Adams and Cheng Gao for their help with data analysis and Yvonne Lipman for the English editing.
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This research was co-supported by the United States-Israel Binational Science Foundation (BSF Grant 2012081) and Tel-Hai College.
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HS, SLL, OP and TB conceived and designed the experiment. GS and YA performed the experiment. SLL and HS wrote the paper and analyzed the data, and all authors contributed substantially to revisions.
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Livne-Luzon, S., Perlson, O., Avidan, Y. et al. A non-linear effect of the spatial structure of the soil ectomycorrhizal spore bank on the performance of pine seedlings. Mycorrhiza 31, 325–333 (2021). https://doi.org/10.1007/s00572-021-01023-8
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DOI: https://doi.org/10.1007/s00572-021-01023-8