Biochemical and physiological aspects of restinga herbaceous plants tolerance to iron ore tailing plume along the coastal region of Espírito Santo-Brazil

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

“…The net photosynthetic rate of plants gradually increased with the increase in heavy metal concentration in tailings, when Philippine Tung ( Reutealis trisperma ) was planted in lead and silver tailings for a short period [ 17 ]. As the proximity to the source increases and the heavy metal content increases, the stomatal conductance (Gs) and transpiration rate (E) of two Restinga herbaceous species— Ipomoea imperati and Canavalia rosea —are dramatically reduced [ 18 ]. Yihui et al studied the photosynthesis of maize under Pb–Zn mineral stress and found that the net photosynthetic rate (Pn), Gs, and substomatal CO 2 concentration (Ci) parameters increased at low concentrations but decreased at high concentration [ 19 ].…”

Residues from the Fundão dam accident in Brazil and their effects on photosynthetic efficiency of two restinga plant species

“…The accumulation of heavy metals in plants depends on the mobility of the elements in the soil and the absorption capacity of each species (Dubey et al 2018). Moreover, the deposition of salt spray can be a primary source of the spread of contaminated particles in coastal regions (Du and Hesp 2020;Lana-Costa et al 2021;Oliveira et al 2022). The primary origin of salt spray is commonly attributed to the bursting of bubbles in breaking waves, often recognized as a crucial factor influencing vegetation zonation in coastal dunes (Du and Hesp 2020).…”

“…The impact of precipitation deficits on photochemical efficiency can be evaluated by the PIABS parameter, which is the performance index for energy conservation from photons absorbed by PSII resulting in a reduction of intersystem electron acceptors (Goltsev et al 2016). Drought damages the photochemical apparatus in restinga species (Silva et al 2017;Lana-Costa et al 2021;Oliveira et al 2022). B. sericea exhibited reduced φP0 and PIABS values during the dry season, which may have resulted from the inactivity of the RCs (Oliveira et al 2022).…”

“…In heterogeneous environments, the physiological responses of plants depend on the simultaneous action of multiple stresses by seasonal variations in climate (Pandey et al 2015). Research on the physiological responses of plants to environmental resource gradients is important for the prediction of ecosystem responses to environmental changes (Ghori et al 2019;Souri et al 2019;Lana-Costa et al 2021;Tognella et al 2022;Oliveira et al 2022).…”

“…Another tolerance mechanism is enclosed in a separate compartment and removing heavy metal from the cytosol away from other cellular organelles (Ghori et al 2019). Investigation of the native restinga species with potential for high tolerance to the heavy metal is essential to understand these mechanisms (Lana-Costa et al 2021;Oliveira et al 2022). Thus, ChlF can be effectively used to predict the magnitude of the impacts of absorbed metals on the coastal restinga vegetation subjected to different rainfall regimes.…”