Figure 2From: Comparison of investigation methods of heat injury in grapevine (Vitis) and assessment to heat tolerance in different cultivars and speciesComparison of the three investigation methods (OJIP test, photosynthetic O 2 evolution and electrolyte leakage) for foliar heat injury in three grape cultivars (‘Jingxiu’, ‘Riesling’ and spine grape) under the critical temperature (47°C). Fv/Fm represents the OJIP test method; RII represents the electrolyte leakage method; and the O2 evolution rate represents the photosynthetic O2 evolution method. Each value represents the mean of five replicates, and the error bars represent ± S.E.Back to article page