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Effects of field inoculation of potato tubers with the arbuscular mycorrhizal fungus Rhizophagus irregularis DAOM 197198 are cultivar dependent

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Abstract

Sustainable agriculture is based on improving soil microbial activities through new practices including the use of biostimulants such as arbuscular mycorrhizal fungi (AMF). However, many factors, such as plant cultivar, influences the success of mycorrhizal inoculation in field. We investigated the impact of inoculation with Rhizophagus irregularis DAOM 197198 (AGTIV®, Premier Tech) on three potato cultivars (Solanum tuberosum cv. Écrin, Fontane, Manitou ® Desmazières) in two microplots in North of France. In each trial, sampling was carried out (i) at the tuber filling stage to study potato development and nutrition, as well as bacterial and fungal diversity in the roots, and (ii) at maturity to determine tuber yield. Our results showed that inoculation (i) homogenize tuber calibre (ii) significantly increased potato yield and financial income for Manitou plants, (iii) homogenized the phosphate root-to-shoot ratio, and (iv) did not modify neither the taxonomic composition nor the relative abundance of bacteria, fungi and AMF associated with potato roots whatever the potato cultivar. Our results suggest that the positive effects of the inoculation with R. irregularis DAOM 197198 might depend on the potato cultivar, but further investigations are needed to understand the impact of different soils and agricultural systems on inoculation success.

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Acknowledgements

This research was jointly supported by the CIFRE program (CIFRE industrial research agreements n°2019/0129) between Premier Tech GHA SAS France and the General Direction for Higher Education of the Ministry for Education and Research of France. The authors are grateful to Desmazières for financial support and providing field trials. The help of Célien Durnet, Louise Védrenne, Valérie Monfort-Pimet and Noureddine El-Mjiyad in performing the experiments was greatly acknowledged.

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R.B. performed the experiments. R.B., C.L., M.T., E.V., P-E.C., D.W. conceived and designed the experiments. R.B., C.L., M.T., E.V., P-E.C., D.W. wrote and revised the paper.

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Correspondence to Raphael Boussageon, Daniel Wipf or Pierre-Emmanuel Courty.

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Boussageon, R., van Tuinen, D., Lapadatescu, C. et al. Effects of field inoculation of potato tubers with the arbuscular mycorrhizal fungus Rhizophagus irregularis DAOM 197198 are cultivar dependent. Symbiosis 89, 213–226 (2023). https://doi.org/10.1007/s13199-023-00908-w

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  • DOI: https://doi.org/10.1007/s13199-023-00908-w

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  1. Raphael Boussageon
  2. Pierre-Emmanuel Courty