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

Figure 4

Activities of antioxidant enzymes related to the leaf protein content: (a) ascorbate peroxidase, (b) glutathione reductase, and (c) catalase (all expressed as μmol min⁻¹ mg⁻¹ protein) in poplar control leaves and in leaves exposed to “warming.” Mean ± SE is shown for Populus x euramericana grown in a hydroponic system with water at different temperatures at 50 days after start of treatment. Differences between means of control and “warming”—treated leaves are shown. *𝑃≤0.05, **𝑃≤0.01, ***𝑃≤0.001.

(a)

(b)

(c)