Abstract
Background and aims
The rate of mycorrhizal colonization in plant roots generally decreases with increased soil nutrient availability but the underlying mechanism is still poorly understood. Our aims were to explore the responses of root mycorrhizal colonization, passage cells, and penetration points under nitrogen (N) and phosphorus (P) addition and their potential linkages in woody and herbaceous plants.
Methods
N and P were added to the pots of 14 temperate species (eight woody and six herbaceous) in the greenhouse, and the distribution of mycorrhizal colonization, passage cells and penetration points for each species were observed by staining and microscopy of first-order roots.
Results
The average density and proportion of mycorrhizal colonization, passage cells and penetration points of 14 species were significantly decreased under N and P addition. The N addition had a stronger effect on the plants than the P addition. More importantly, the mycorrhizal colonization density and proportion showed significant positive correlations with passage cell density and proportion, and with penetration point density and proportion of woody and herbaceous plants under control and nutrient treatments.
Conclusions
The density and proportion of mycorrhizal colonization were closely related with passage cells and penetration points in both woody and herbaceous species in either control or nutrient treatments. Our results are of great significance for understanding the relationship between soil fungi and plant roots under changes of soil nutrient availabilities.
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Acknowledgements
This work was financially supported by the National Key Research and Development Program of China (2017YFD0601204), the Fundamental Research Funds for the Central Universities (2572019CP16), and the Heilongjiang Touyan Innovation Team Program (Technology Development Team for Highly efficient Silviculture of Forest Resources). The authors thank AiMi Academic Services (www.aimieditor.com) for English language editing and review services.
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Xu, L., Wang, S., Liu, Y. et al. Responses of mycorrhizal colonization to nitrogen and phosphorus addition in fourteen woody and herbaceous species: the roles of hypodermal passage cells and penetration points. Plant Soil 469, 273–285 (2021). https://doi.org/10.1007/s11104-021-05107-4
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DOI: https://doi.org/10.1007/s11104-021-05107-4