Resource allocation to growth or luxury consumption drives mycorrhizal responses.

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ID: 28568
2019
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Abstract
Highly variable phenotypic responses in mycorrhizal plants challenge our functional understanding of plant-fungal mutualisms. Using non-invasive high-throughput phenotyping, we observed that arbuscular mycorrhizal (AM) fungi relieved phosphorus (P) limitation and enhanced growth of Brachypodium distachyon under P-limited conditions, while photosynthetic limitation under low nitrogen (N) was exacerbated by the fungus. However, these responses were strongly dependent on host genotype: only the faster growing genotype (Bd3-1) utilised P transferred from the fungus to achieve improved growth under P-limited conditions. Under low N, the slower growing genotype (Bd21) had a carbon and N surplus that was linked to a less negative growth response compared with the faster growing genotype. These responses were linked to the regulation of N : P stoichiometry, couples resource allocation to growth or luxury consumption in diverse plant lineages. Our results attest strongly to a mechanism in plants by which plant genotype-specific resource economics drive phenotypic outcomes during AM symbioses.
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riley2019resourceecology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Riley, Rohan C;Cavagnaro, Timothy R;Brien, Chris;Smith, F Andrew;Smith, Sally E;Berger, Bettina;Garnett, Trevor;Stonor, Rebecca;Schilling, Rhiannon K;Chen, Zhong-Hua;Powell, Jeff R;
Journal Ecology letters
Year 2019
DOI
10.1111/ele.13353
URL
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