Fig. 3
From: Do karst woody plants control xylem tension to avoid substantial xylem cavitation in the wet season?
Maximum quantum efficiency of photosystem II (Fv/Fm) of karst plants at noon. Plants from the karst area of China that maintained leaf hydraulic conductivity loss below 40% of maximum (five species, black column) were compared to those that tolerated more than 60% (six species, grey column). Two extreme cases (Itea chinensis, an evergreen species that can maintain 98.61% leaf specific hydraulic conductivity (Kl) and Sapium sebiferum, a deciduous species that can tolerate 90.07% loss of Kl at noon) were excluded from the analysis. There was no significant difference in Fv/Fm between these two groups (P = 0.339)