Figure 2.
(a–e) Effects of foliar application of kaolin and SiO2 NPs on (a) SPAD chlorophyll values, (b) net photosynthetic rate, (c) stomatal conductance, (d) intercellular CO2 concentration, and (e) transpiration rate of maize grown under available water (100%, 80%, and 60% AW). Fisher’s multiple range test indicates significant differences between means in each bar (p < 0.05). ** and *** indicate differences at p < 0.05 and p < 0.01 probability levels, respectively.
