ArticleThe New phytologist2025
Changes in leaf economic trait relationships across a precipitation gradient are related to differential gene expression in a C
Article in The New phytologist, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Plant functional groups modulate variation and covariation in leaf and seed traits across years.BMC plant biology · 2026Article
- Drivers of Intraspecific Trait Variation and Drought Response of a Dominant US Great Plains Grass: Disentangling the Role of Climate and Genetic Background.Ecology and evolution · 2026Article
- Correlational selection and genetic architecture shape the evolution of the leaf economics spectrum in a perennial grass.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
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Abstract
The leaf economics spectrum (LES) describes a suite of functional traits that consistently covary at large spatial and taxonomic scales. Despite its importance at these larger scales, few studies have examined the major drivers of intraspecific variation in the LES - phenotypic plasticity and standing genetic variation. Using experimental precipitation manipulations, we examined whether covariation among leaf economics traits and selection on leaf economics traits and trait combinations change as diverse genotypes of the widespread perennial grass Panicum virgatum are exposed to differences in precipitation. We also used RNA-Seq to examine whether groups of co-expressed genes that align with leaf economics traits function in processes hypothesized to underlie the LES. Water availability impacted leaf economics trait covariation in important ways - covariation between leaf economics traits and selection on covariation between traits (i.e. correlational selection) tended to be strongest when water availability was high. Additionally, many genes associated with leaf economics traits functioned in processes that may explain how the LES originates, such as chloroplasts, cell walls, and nitrogen metabolism. Water availability is likely an important modulator of selection and evolution of the LES in P. virgatum that can be better understood by examining gene expression.
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