Abstract
The nurse effect is a positive interaction in which a nurse plant improves the abiotic environment for another species (beneficiary plant) and facilitates its establishment. The evergreen shrub Vaccinium vitis-idaea (a beneficiary plant) grows mainly under the dwarf shrub Pinus pumila (a nurse plant) in the alpine regions of central Japan. However, whether V. vitis-idaea shrubs under various P. pumila shrubs spread through clonal growth and/or seeds remains unclear. We investigated the clonal structure of V. vitis-idaea under the nurse plant P. pumila in Japanese alpine regions. MIG-seq analysis was conducted to clarify the clonal diversity of V. vitis-idaea in isolated and patchy P. pumila plots on a ridge (PATs), and in a plot covered by dense P. pumila on a slope adjacent to the ridge (MAT) on Mt. Norikura, Japan. We detected 28 multilocus genotypes in 319 ramets of V. vitis-idaea across 11 PATs and MAT. Three genets expanded to more than 10 m in the MAT. Some genets were shared among neighboring PATs or among PATs and MAT. These findings suggest that the clonal growth of V. vitis-idaea plays an important role in the sustainability of populations. The clonal diversity of V. vitis-idaea was positively related with the spatial size of PATs and was higher in MAT than in PATs at a small scale. Therefore, the spatial spread of the nurse plant P. pumila might facilitate the nurse effect on the genetic diversity of beneficiary plants, leading to the sustainability of beneficiary populations.
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Acknowledgements
The authors thank Shiori Narizuka and Yuki Ohkawa for their help with the fieldwork. We would like to thank Editage (www.editage.com) for the English language editing. I. M. received support from JSPS KAKENHI (grant numbers JP19K06129 and JP22K05754).
Funding
Japan Society for the Promotion of Science London, JP19K06129, INOUE MIZUKI, JP22K05754, INOUE MIZUKI.
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Sugimoto, K., Kawai, R., Koizumi, T. et al. Fine-scale clonal structure of the lingonberry Vaccinium vitis-idaea under the nurse plant Pinus pumila vegetation in an alpine region, Mt. Norikura. J Plant Res (2024). https://doi.org/10.1007/s10265-024-01537-0
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DOI: https://doi.org/10.1007/s10265-024-01537-0