Fungal partners recruit bacteria to unlock buried soil phosphorus
Li J, Zhang Y, Yang K, Yang Y, Chang Z
Mycorrhizal Networks
If you've ever wondered why nothing grows well in that salty, alkaline patch of yard or roadside, this research shows a natural fix already at work underground: fungi teaming up with bacteria to free trapped nutrients for plant roots.
Scientists studied a tree called Russian olive growing in harsh, salty, alkaline soil, the kind where phosphorus, a nutrient plants desperately need, gets locked up and unavailable. They found that when a helpful root fungus moved in, it changed the neighborhood of soil bacteria around the roots, encouraging species that specialize in breaking phosphorus free from organic matter. The fungus didn't just feed the plant directly; it reorganized the whole underground microbial community to solve the nutrient problem.
Key Findings
AM fungal inoculation (Rhizophagus intraradices) boosted plant growth, root development, and phosphatase enzyme activity in Russian olive grown in soda saline-alkali soil.
Fungal colonization enriched organic phosphorus-mineralizing bacteria, primarily Streptomyces, Pseudoxanthomonas, Sphingomonas, and Variovorax.
The phosphorus-cycling gene network shifted its hubs from inorganic phosphorus transport genes to organic phosphorus mineralization genes, with AM fungi directly driving gene network changes and indirectly affecting phosphorus pools via soil chemistry.
chevron_right Technical Summary
Beneficial soil fungi help a salt-tolerant tree survive phosphorus-poor, salty soils by recruiting helpful bacteria that unlock hidden phosphorus, offering a possible strategy for restoring damaged farmland.
Abstract Preview
Original paper
Arbuscular mycorrhizal fungi reshape rhizosphere microbial communities to alleviate phosphorus deficiency in soda-saline soils.
Phosphorus availability is severely constrained in soda saline-alkali soils; yet the mechanisms by which arbuscular mycorrhizal (AM) fungi modulate rhizosphere microbial communities to alleviate th...
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Elaeagnus angustifolia, commonly called Russian olive, silver berry, oleaster, or wild olive, is a species of Elaeagnus, native to Asia and limited areas of eastern Europe. It is widely established in North America as an introduced species.