The Impact of Root Temperature on Photosynthesis and Isoprene Emission in Three Different Plant Species

Figure 3

Time course of (a) CO₂ Assimilation (μmol m⁻² s⁻¹), (b) Stomatal conductance (mol m⁻² s⁻¹), (c) Isoprene emission (nmol m⁻² s⁻¹), (d) percentage of assimilated carbon lost as isoprene (%), ±S.E. for Populus x euramericana grown in a hydroponic system with water at different temperatures at 30, 38, 45, 75, and 102 days after start of treatment. *𝑃≤0.05, **𝑃≤0.01, ***𝑃≤0.001. Measurements started after 30 days from the beginning of the warming treatment, that is, as soon as the first mature leaves were available.

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