Abstract
Plant-associated fungal communities play a vital role in plant adaptations, physiological functions, and productivity. Therefore, it is important to reveal the mechanisms driving the assembly of these communities. Yet it is still not fully understood how community assembly and structure differentiate in plant compartments, growth seasons, and varieties at large geographic distances. In this study, we analyzed bulk soil and plant-associated fungal communities of five wheat varieties across two growth stages in three biogeographic sites with distances of about 324, 534, or 800 km apart between any two locations. Our results indicated that the fungal community varied primarily across the sample types (leaf endosphere, root endosphere, rhizosphere, and bulk soil), followed by growth stage. Compared with the regreening stage, lower α-diversity and more dominance by abundant species in the fungal community were observed in wheat-associated compartments (four sample types except for bulk soil) at the heading stage. Additionally, within each wheat-associated compartment across every growth stage, location had stronger effects on fungal community assembly than the wheat variety. The effects of variety on fungal community assembly were location specific as were the growth-stage patterns of varietal effects on leaf endosphere and rhizosphere fungal communities. We further detected a less diverse but abundant core fungal taxa that could be grouped into three clusters associated mainly with location. This study characterized the interplay effects between plant selection (compartment, growth stage, variety) and environment (location) on wheat-associated mycobiomes by determining drivers of fungal community assembly and core fungal taxa in field conditions.
Key points
• Fungal community assembly was mainly shaped by sample type and growth stage
• A lower diversity and more abundant core fungal taxa were shown at heading stage
• Location had stronger effects on fungal community assembly than variety
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Acknowledgements
We thank the colleagues in Northwest Agriculture and Forestry University for their help in field sampling. We appreciate the excellent editing work by Lisa Sheppard.
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This work was supported by the National Key Research and Development Program of China (2018YFE0107000), the National Natural Science Foundation of China (32071548, 42077206), and China Biodiversity Observation Networks (Sino BON).
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YZ, MY, DH, and XL conceived and designed research. YZ, HC, LL, and XZ conducted experiments. YZ analyzed data. YZ wrote the original manuscript. XL, MY, and JW critically revised the manuscript. All authors read and approved the final manuscript.
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Zheng, Y., Li, X., Cao, H. et al. The assembly of wheat-associated fungal community differs across growth stages. Appl Microbiol Biotechnol 105, 7427–7438 (2021). https://doi.org/10.1007/s00253-021-11550-1
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DOI: https://doi.org/10.1007/s00253-021-11550-1