Abiotic Factors Affecting Vector-Borne Plant Pathogen Complexes: Elevated CO<sub>2</sub> and the Barley Yellow Dwarf Pathosystem.

Overall, root biomass increased under elevated CO 2 ( F 1, 233 = 25.40, p < 0.001), with an increasing trend across all three species ( Figure 1 ) (CO 2 × host plant: F 2, 231 = 1.70, p = 0.200).

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