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Article

Genome-Wide Analysis of Nutrient Signaling Pathways Conserved in Arbuscular Mycorrhizal Fungi

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State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Lingnan Guangdong Laboratory of Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
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Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
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UMR Interactions Arbres/Microorganismes, Centre INRA-Grand Est-Nancy, 54280 Champenoux, France
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Authors to whom correspondence should be addressed.
Academic Editor: Paola Bonfante
Microorganisms 2021, 9(8), 1557; https://doi.org/10.3390/microorganisms9081557
Received: 21 June 2021 / Revised: 13 July 2021 / Accepted: 16 July 2021 / Published: 22 July 2021
Arbuscular mycorrhizal (AM) fungi form a mutualistic symbiosis with a majority of terrestrial vascular plants. To achieve an efficient nutrient trade with their hosts, AM fungi sense external and internal nutrients, and integrate different hierarchic regulations to optimize nutrient acquisition and homeostasis during mycorrhization. However, the underlying molecular networks in AM fungi orchestrating the nutrient sensing and signaling remain elusive. Based on homology search, we here found that at least 72 gene components involved in four nutrient sensing and signaling pathways, including cAMP-dependent protein kinase A (cAMP-PKA), sucrose non-fermenting 1 (SNF1) protein kinase, target of rapamycin kinase (TOR) and phosphate (PHO) signaling cascades, are well conserved in AM fungi. Based on the knowledge known in model yeast and filamentous fungi, we outlined the possible gene networks functioning in AM fungi. These pathways may regulate the expression of downstream genes involved in nutrient transport, lipid metabolism, trehalase activity, stress resistance and autophagy. The RNA-seq analysis and qRT-PCR results of some core genes further indicate that these pathways may play important roles in spore germination, appressorium formation, arbuscule longevity and sporulation of AM fungi. We hope to inspire further studies on the roles of these candidate genes involved in these nutrient sensing and signaling pathways in AM fungi and AM symbiosis. View Full-Text
Keywords: arbuscular mycorrhizal fungi; nutrient signaling pathways; cAMP/PKA; TOR; SNF1; PHO; appressorium formation; arbuscule longevity arbuscular mycorrhizal fungi; nutrient signaling pathways; cAMP/PKA; TOR; SNF1; PHO; appressorium formation; arbuscule longevity
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MDPI and ACS Style

Zhou, X.; Li, J.; Tang, N.; Xie, H.; Fan, X.; Chen, H.; Tang, M.; Xie, X. Genome-Wide Analysis of Nutrient Signaling Pathways Conserved in Arbuscular Mycorrhizal Fungi. Microorganisms 2021, 9, 1557. https://doi.org/10.3390/microorganisms9081557

AMA Style

Zhou X, Li J, Tang N, Xie H, Fan X, Chen H, Tang M, Xie X. Genome-Wide Analysis of Nutrient Signaling Pathways Conserved in Arbuscular Mycorrhizal Fungi. Microorganisms. 2021; 9(8):1557. https://doi.org/10.3390/microorganisms9081557

Chicago/Turabian Style

Zhou, Xiaoqin, Jiangyong Li, Nianwu Tang, Hongyun Xie, Xiaoning Fan, Hui Chen, Ming Tang, and Xianan Xie. 2021. "Genome-Wide Analysis of Nutrient Signaling Pathways Conserved in Arbuscular Mycorrhizal Fungi" Microorganisms 9, no. 8: 1557. https://doi.org/10.3390/microorganisms9081557

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