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2 results for “eCO2”
Effects of eCO2 on plant growth and pollen chemistry in 14 angiosperms
<p>Elevated atmospheric carbon dioxide (eCO<sub>2</sub>) can affect plant growth and physiology, which can, in turn, impact herbivorous insects, including by altering pollen or plant tissue nutrition. Previous research suggests that eCO<sub>2</sub>can reduce pollen nutrition in some species, but it is unknown whether this effect is consistent across flowering plant species. We experimentally quantified the effects of eCO<sub>2</sub> across multiple flowering plant species on plant growth in 9 species and pollen chemistry (%N an estimate for protein content and nutrition in 12 species; secondary chemistry in 5 species) in greenhouses. For pollen nutrition, only buckwheat significantly responded to eCO<sub>2</sub>, with %N increasing in eCO<sub>2</sub>; CO<sub>2</sub> treatment did not affect pollen amino acid composition but altered secondary metabolites in buckwheat and sunflower. Plant growth under eCO<sub>2</sub> exhibited two trends across species: plant height was taller in 44% of species and flower number was affected for 63% of species (3 species with fewer and 2 species with more flowers). The remaining growth metrics (leaf number, above-ground biomass, flower size, and flowering initiation) showed divergent, species-specific responses, if any. Our results indicate that future eCO<sub>2</sub> is unlikely to uniformly change pollen chemistry or plant growth across flowering species but may have the potential to alter ecological interactions, or have particularly important effects on specialized pollinators.</p>
Effects of eCO2 on plant growth and pollen chemistry in 14 angiosperms
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