Overlooked root fungi may boost soil health and stress tolerance
Mandyam K, Jumpponen A
Soil Health
The dark, thread-like fungi coating the roots of nearly every plant you've ever grown, from tomatoes to prairie grasses, might be quietly helping them handle drought and poor soil, so understanding them could change how you think about soil care and fertilizer use.
Almost every plant has fungi living inside its roots that scientists used to overlook because they don't form the neat partnerships that mycorrhizal fungi do. These 'dark septate endophytes' turn out to help plants pull in nutrients, tolerate drought and disease, and even help glue soil particles together. Researchers compiling genetic and ecological evidence now think these fungi deserve a much bigger role in how we think about healthy soil and sustainable farming.
Key Findings
Dark septate endophytes (DSE) share molecular and functional traits with ericoid mycorrhizal fungi, suggesting they evolved from soil-dwelling decomposers toward root-associated lifestyles
Their melanin production and extensive carbohydrate-active enzyme (CAZyme) repertoires support roles in nutrient cycling, carbon storage, and soil aggregation
DSE effects on plant growth range from positive to neutral to negative depending on host species and environmental context, complicating simple predictions of benefit
chevron_right Technical Summary
Fungi living quietly inside plant roots without forming obvious partnerships, called dark septate endophytes, may be doing more heavy lifting for soil health and plant resilience than anyone realized. This review pulls together genetics and ecology data to show they help plants absorb nutrients, survive stress, and build healthier soil.
Abstract Preview
Original paper
Decoding dark septate endophyte symbiosis: A functional and ecological perspective.
Plant root microbial symbioses influence plant performance and ecosystem processes. Among these, dark septate endophyte (DSE) fungi are ubiquitous, non-mycorrhizal root endophytes with broad host r...
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Mycorrhizal networks are underground fungal systems that connect plant roots together, forming symbiotic relationships where fungi provide essential nutrients and water in exchange for sugars produced by photosynthesis. These networks fundamentally reshape how plants acquire resources and interact
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