Low- and High-Temperature Tolerance and Acclimation for Chlorenchyma versus Meristem of the Cultivated Cacti Nopalea cochenillifera, Opuntia robusta, and Selenicereus megalanthus
Figure 1
Cell sensitivity to extreme temperatures, as evidence by the uptake of the vital stain neutral red into the central vacuole, for stem chlorenchyma (∘) and meristem (∆) cells of (a) Nopalea cochenillifera, (b) Opuntia robusta, and (c) Selenicereus megalanthus. Plants were maintained in the glasshouse with mean day/night air temperatures of 25/20°C. Data are normalized relative to stain uptake at 25°C (90–94% of the cells) and are presented as means ± SE ( plants).
