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| Main Authors: | , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
The New phytologist
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42053696/ |
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| _version_ | 1868266053602115584 |
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| author | Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro |
| author_facet | Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro |
| collection | PubMed - marine biology |
| contents | Phenylalanine N enrichment likely indicates fungal-derived organic nutrient acquisition in mycoheterotrophic plants across fungal guilds. Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro Nitrogen Isotopes Phenylalanine Fungi Nutrients Heterotrophic Processes Mycorrhizae Plants Beyond fully mycoheterotrophic plants, many green plants may also obtain carbon from fungal partners. However, bulk stable isotope analyses often lack sufficient resolution in arbuscular mycorrhizal and rhizoctonia-associated orchid systems, limiting inference of fungal-derived organic nutrient acquisition. We measured δN values of glutamic acid (δN) and phenylalanine (δN) in 10 fully mycoheterotrophic species spanning arbuscular mycorrhizal, ectomycorrhizal, and saprotrophic fungal guilds, as well as in three photosynthetic species with contrasting inferred nutritional modes, together with co-occurring autotrophic references and, where available, fungal material. This Glu-Phe framework was originally developed for animal food-web studies, in which trophic position is estimated from strong N enrichment (c. 7-8‰ per trophic step) and minimal N enrichment (c. 0-1‰). We found that mycoheterotrophic plants invert this pattern, showing minimal N enrichment (-1.2 to 3.3‰) but pronounced N enrichment (11.2 to 19.6‰) relative to their fungal partners. They also exhibited amino acid δN profiles distinct from autotrophs, consistent with uptake of fungal-derived organic nitrogen. To our knowledge, such strong N enrichment relative to nutrient sources has not been reported in other organisms. Overall, amino acid δN profiles complement bulk δH, δC, and δN values for assessing fungal-derived organic nutrient acquisition in green plants. |
| format | Artículo científico |
| id | pubmed_42053696 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | The New phytologist |
| record_format | pubmed |
| spellingShingle | Phenylalanine N enrichment likely indicates fungal-derived organic nutrient acquisition in mycoheterotrophic plants across fungal guilds. Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro Nitrogen Isotopes Phenylalanine Fungi Nutrients Heterotrophic Processes Mycorrhizae Plants Phenylalanine N enrichment likely indicates fungal-derived organic nutrient acquisition in mycoheterotrophic plants across fungal guilds. Suetsugu, Kenji Yoshimizu, Chikage Matsubayashi, Jun Tayasu, Ichiro Nitrogen Isotopes Phenylalanine Fungi Nutrients Heterotrophic Processes Mycorrhizae Plants Beyond fully mycoheterotrophic plants, many green plants may also obtain carbon from fungal partners. However, bulk stable isotope analyses often lack sufficient resolution in arbuscular mycorrhizal and rhizoctonia-associated orchid systems, limiting inference of fungal-derived organic nutrient acquisition. We measured δN values of glutamic acid (δN) and phenylalanine (δN) in 10 fully mycoheterotrophic species spanning arbuscular mycorrhizal, ectomycorrhizal, and saprotrophic fungal guilds, as well as in three photosynthetic species with contrasting inferred nutritional modes, together with co-occurring autotrophic references and, where available, fungal material. This Glu-Phe framework was originally developed for animal food-web studies, in which trophic position is estimated from strong N enrichment (c. 7-8‰ per trophic step) and minimal N enrichment (c. 0-1‰). We found that mycoheterotrophic plants invert this pattern, showing minimal N enrichment (-1.2 to 3.3‰) but pronounced N enrichment (11.2 to 19.6‰) relative to their fungal partners. They also exhibited amino acid δN profiles distinct from autotrophs, consistent with uptake of fungal-derived organic nitrogen. To our knowledge, such strong N enrichment relative to nutrient sources has not been reported in other organisms. Overall, amino acid δN profiles complement bulk δH, δC, and δN values for assessing fungal-derived organic nutrient acquisition in green plants. |
| title | Phenylalanine N enrichment likely indicates fungal-derived organic nutrient acquisition in mycoheterotrophic plants across fungal guilds. |
| topic | Nitrogen Isotopes Phenylalanine Fungi Nutrients Heterotrophic Processes Mycorrhizae Plants |
| url | https://pubmed.ncbi.nlm.nih.gov/42053696/ |