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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.

2024-12-20 plant biology
10.1101/2024.12.17.628921 bioRxiv
Show 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.

Published in Science Advances (predicted rank #8) · training set

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