Soil fungi help leafy greens thrive on less fertilizer
Guerrero-Franco JJ, Romero-Muñoz M, Gálvez-López A, Albacete A
Mycorrhizal Networks
If you grow salad greens in a raised bed with mediocre soil, this points to a cheap fix: a mycorrhizal fungi inoculant that lets plants do more with less nitrogen fertilizer.
Scientists starved escarole plants of nitrogen, a key fertilizer nutrient, and found that partnering with a root fungus called Rhizophagus irregularis let the plants keep growing well anyway. Instead of pulling in more nitrogen, the fungus helped the plant use what little it had more efficiently, building up sugar, protein, chlorophyll, and other useful compounds. It's a reminder that healthy soil biology can sometimes substitute for the bag of fertilizer.
Key Findings
Mycorrhizal inoculation maintained shoot growth under 25% nitrogen supply while reducing root growth, suggesting the fungus compensated for nutrient scarcity
Of 7,165 metabolic features altered by nitrogen limitation, 58% increased in mycorrhizal plants, including glucose, soluble proteins, and chlorophylls
Metabolomics revealed accumulation of bioactive compounds like riboflavin, L-citrulline, sarcosine, and 5-hydroxy-L-tryptophan, with PC1 explaining 49% of chemical variability between mycorrhizal and non-mycorrhizal plants
chevron_right Technical Summary
Friendly soil fungi help escarole (a leafy green) cope with low-nitrogen soil by changing how the plant uses the nitrogen it has, rather than giving it more of it, boosting sugar, protein, and chlorophyll levels even when fertilizer is scarce.
Abstract Preview
Original paper
Arbuscular mycorrhizal fungi reshape carbon-nitrogen balance and metabolism in nitrogen-limited escarole (Cichorium endivia L.).
Nitrogen nutrition remains a major challenge for sustainable crop production, particularly under the current need to reduce fertilizer inputs. This study evaluated whether inoculation with arbuscul...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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Endive is a leaf vegetable belonging to the genus Cichorium, which includes several similar bitter-leafed vegetables. Species include Cichorium endivia, Cichorium pumilum, and Cichorium intybus. Chicory includes types such as radicchio, puntarelle, and Belgian endive.