Effect of variable phosphorus availability on root mechanisms involved in mobilization of the soil P in three lupine species
Abstract Improving the soil phosphorus (P) acquisition efficiency by plants is one of the most important challenges for modern agriculture. Only 15–20% of this nutrient applied to the soil with fertilisers is used by plants, with the majority being converted to less available forms. Lupine species a...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-06-01
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| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-03694-1 |
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| Summary: | Abstract Improving the soil phosphorus (P) acquisition efficiency by plants is one of the most important challenges for modern agriculture. Only 15–20% of this nutrient applied to the soil with fertilisers is used by plants, with the majority being converted to less available forms. Lupine species are a great genetic model system with significant potential to provide novel information. Here we present an investigation into the effects of variable availability in the rhizosphere on P-mobilising mechanisms and photosynthetic activity, studied in 12 varieties of three lupine species. P uptake was significantly stimulated by low molecular weight organic acid (OA) exudation and H+-ATPase-mediated proton transport in roots. The predominant mechanism in white lupine was the H+ release into the rhizosphere, OA exudation predominated in yellow lupine, while narrow-leaved lupine varieties used both strategies effectively. Three lupine species showed significant differences in the quantitative and qualitative composition of carboxylic acids in root exudates. The variable P availability in soil solution significantly affected the photosynthetic performance of the plants studied. At the same time, the activity of the photosynthetic electron transport chain and photosynthetic CO2 assimilation was a key factor determining activity of the mechanisms involved in P mobilisation. We discuss the implications of these contrasting strategies for our understanding of tolerance to low P and in relation to breeding plants with higher P acquisition efficiency. |
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| ISSN: | 2045-2322 |