Lotus japonicus VIH2 is an inositol pyrophosphate synthase that regulates arbuscular mycorrhiza

Raj, K.; Gaugler, V.; Lu, M.; Schaedel, M.; Gaugler, P.; Grothaus, C. M. M.; Jochimsen, U. A.; Liu, G.; Harings, M.; Jessen, H. J.; Schaaf, G.; Ried-Lasi, M. K.

doi:10.1101/2024.12.17.628921

bioRxiv · 10.1101/2024.12.17.628921

Lotus japonicus VIH2 is an inositol pyrophosphate synthase that regulates arbuscular mycorrhiza

Raj, K.·Gaugler, V.·Lu, M.·Schaedel, M.·Gaugler, P.·Grothaus, C. M. M.·Jochimsen, U. A.·Liu, G.·Harings, M.·Jessen, H. J.·Schaaf, G.·Ried-Lasi, M. K.

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Abstract

Plant yield is often maximized by the extensive use of mineral fertilizers, which, however, has severe environmental consequences. Phosphate is particularly problematic, as it represents a globally limited resource, and its runoff and soil erosion threaten open water bodies. Many crops engage in arbuscular mycorrhizal (AM) symbiosis with nutrient-acquiring fungi, aiding in the uptake of phosphate and other mineral nutrients. However, AM colonization is strongly reduced under high soil phosphate levels. A mechanistic understanding of phosphate sensing, phosphate starvation responses, and their connection to AM remains enigmatic. Here, we show that in Lotus japonicus, low-abundant, energy-rich inositol pyrophosphates act as master regulators of AM, orchestrating the crosstalk between phosphate starvation responses and plant root endosymbiosis. These findings hold promise for breeding nutrient-efficient crops.

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Raj, K., Gaugler, V., Lu, M., Schaedel, M., Gaugler, P., Grothaus, C. M. M., Jochimsen, U. A., Liu, G., Harings, M., Jessen, H. J., Schaaf, G., Ried-Lasi, M. K.. 2024-12-20. Lotus japonicus VIH2 is an inositol pyrophosphate synthase that regulates arbuscular mycorrhiza. https://doi.org/10.1101/2024.12.17.628921

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