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

Table 1

Contents of the ascorbate and glutathione related to the fresh weight: reduced ascorbate (ASC), oxidised ascorbate (DHA), total ascorbate (all expressed as μmol g⁻¹ f.w.), and ascorbate ratio (ASC/DHA); reduced glutathione (GSH), oxidised glutathione (GSSG), total glutathione (all expressed as μmol g⁻¹ f.w.), and glutathione ratio (GSH/GSSG) in poplar leaves under control and warming treatments. Mean ± SE is shown. Differences between means of control and treated leaves are shown with the 𝑃 value. Significant value is with 𝑃<0.05. The activities of antioxidant enzymes were related to the leaf protein content whereas the ascorbate and glutathione contents were related to the fresh weight.

	Control	Warming	𝑃 value
ASC	7.55±0.38	10.01±0.65	0.004
DHA	2.82±0.43	2.76±0.19	0.678
Total ASC	10.36±0.57	12.76±0.68	0.0145
ASC/DHA Ratio	2.68±0.16	3.63±0.09	0.0001
GSH	0.11±0.03	0.22±0.05	0.0823
GSSG	0.18±0.02	0.25±0.02	0.011
Total GSH	0.29±0.02	0.47±0.04	0.002
GSH/GSSG Ratio	0.64±0.28	0.86±0.24	0.5452