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Title: Spatial co-transcriptomics reveals discrete stages of the arbuscular mycorrhizal symbiosis

Journal Article · · Nature Plants (Online)

Abstract The symbiotic interaction of plants with arbuscular mycorrhizal (AM) fungi is ancient and widespread. Plants provide AM fungi with carbon in exchange for nutrients and water, making this interaction a prime target for crop improvement. However, plant–fungal interactions are restricted to a small subset of root cells, precluding the application of most conventional functional genomic techniques to study the molecular bases of these interactions. Here we used single-nucleus and spatial RNA sequencing to explore both Medicago truncatula and Rhizophagus irregularis transcriptomes in AM symbiosis at cellular and spatial resolution. Integrated, spatially registered single-cell maps revealed infected and uninfected plant root cell types. We observed that cortex cells exhibit distinct transcriptome profiles during different stages of colonization by AM fungi, indicating dynamic interplay between both organisms during establishment of the cellular interface enabling successful symbiosis. Our study provides insight into a symbiotic relationship of major agricultural and environmental importance and demonstrates a paradigm combining single-cell and spatial transcriptomics for the analysis of complex organismal interactions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; AC02-05CH11231
OSTI ID:
2335524
Alternate ID(s):
OSTI ID: 2340108
Journal Information:
Nature Plants (Online), Journal Name: Nature Plants (Online) Journal Issue: 4 Vol. 10; ISSN 2055-0278
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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