Exploring the genetic basis of the root economics spectrum

By analyzing the acquisition-conservation tradeoff in root systems among different plants, ecologists have put forward the root economics spectrum (RES) hypothesis. Some plant species have finer and cost-effective absorptive roots that contribute to rapid nutrient uptake but have shorter lifespans, whereas others have thicker and less cost-effective absorptive roots marked by slower nutrient acquisition but longer lifespans. The RES hypothesis reflects the correlations among different root traits, which can facilitate the adaptation of plants to the local environment. The RES is one of the core issues in root ecology, but its adaptive role and genetic basis remains largely elusive.

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