Fig. 2From: Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormonesEffects of Si application on photosynthesis. a Chlorophyll a (b) Chlorophyll b (c) Carotenoids (d) leaf relative water content (LRWC) under control and heat stress conditions. Values are presented as the mean ± SE (n = 6). Different letters in one measure indicate a statistically significant difference at P < 0.005Back to article page