Nutrient Acquisition Strategies in Plant Ecosystems

Plants occupy environments where the availability of essential nutrients—chiefly nitrogen, phosphorus and micronutrients—varies widely in space and time. A suite of morphological, physiological and symbiotic adaptations has evolved to overcome these limitations. Root morphological specialisations, such as cluster and dauciform roots, enhance the surface area for nutrient uptake and exude organic acids or enzymes that solubilise sparingly available resources. Mycorrhizal associations with arbuscular or ectomycorrhizal fungi expand the nutrient‐foraging network and facilitate access to organic and mineral pools. Nitrogen-fixing symbioses further complement nitrogen supply in N-poor soils. Plants also exploit interspecific facilitation, mobilising nutrients through neighbour-driven exudation or post-fire nutrient flushes. These strategies operate across edaphic gradients, fire regimes and successional stages, underpinning community assembly and ecosystem resilience. Understanding these mechanisms has profound implications for ecosystem restoration, sustainable agriculture and the maintenance of global biodiversity.

Research from Nature Portfolio

Recent work in alpine meadow systems has revealed that Cyperaceae species form specialised dauciform roots in response to contrasting nitrogen and phosphorus supplies. Individuals of Carex filispica with dauciform roots show enhanced root morphological traits and biomass accumulation under low phosphorus but reduced performance under high phosphorus, while non-dauciform individuals exhibit opposite nutrient-limitation responses. These findings elucidate how root morphological plasticity underpins species dominance and nutrient cycling in high-altitude ecosystems experiencing nitrogen deposition and phosphorus limitation.

Nutrient Acquisition Strategies in Plant Ecosystems publication trend

The graph below shows the total number of articles in nutrient acquisition strategies in plant ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Dauciform roots: Specialized lateral roots that exude organic acids and enzymes to mobilise sparingly soluble phosphorus.

Carboxylates: Organic acids released by roots to chelate metal ions and increase nutrient solubility.

Phosphatases: Enzymes secreted by roots or microbes that hydrolyse organic phosphorus compounds into plant-available forms.

Mycorrhizal associations: Symbiotic partnerships between plant roots and fungi (arbuscular or ectomycorrhizal) that enhance nutrient and water uptake.

Rhizosphere: The narrow soil zone influenced by root secretions and associated microbial activity critical for nutrient transformation.

Nutrient-use efficiency: The ratio of biomass or photosynthetic output produced per unit of nutrient absorbed by a plant.

References

1. Dauciform roots affect functional traits of Carex filispica under nitrogen and phosphorus fertilization in alpine meadow. Scientific Reports (2023).
2. Not only phosphorus: dauciform roots can also influence aboveground biomass through root morphological traits and metal cation concentrations. Frontiers in Plant Science (2024).
3. Strategies to acquire and use phosphorus in phosphorus-impoverished and fire-prone environments. Plant and Soil (2022).
4. Facilitation of phosphorus acquisition by Banksia attenuata allows Adenanthos cygnorum (Proteaceae) to extend its range into severely phosphorus-impoverished habitats. Plant and Soil (2023).