Drought, heat, and their combined effect on the photosynthetic performance of Psidium myrtoides O. Berg (Myrtaceae) 1

The results indicate that Psidium myrtoides plants reduce photosynthetic activity in the absence of water, contrary to what has been shown in other studies; in addition, they are not potentiated by the combination with heat. [...]we conclude that this species has a potential tolerance to heat (Lean 30-3 °C). MATERIALS AND METHODS Plant material and growth conditions The experiment was conducted in the experimental area of the Department of Botany at the Federal University of Espirito Santo (20°27'49" S e 40°33'44" W, alt. 6m) in February 2018. The data were subjected to analysis of variance and. when significant, were compared by the Scott-Knott test of means at a 5% probability of error. [...]in 7DAT, the control and T2 plants maintained A at around 5.97 (± 1.3), while the two treatments with water restriction (Tj and T J had A equal to zero.