Special issue in honour of Prof. Reto J. Strasser - Environmental pollution is reflected in the activity of the photosynthetic apparatus

Abstract

The efficiency of chlorophyll (Chl) fluorescence for forecasting plant response to environmental pollution was examined in four wheat cultivars. The plants were irrigated with wastewater from Razi petrochemical complex. A forecasting model was designed based on the data of maximal quantum yield of photosystem II (Fv/Fm), efficiency of both photosystems (PIABS), and Chl contents of 60-d analysis. A comparison of the forecasting model results with the real data of Fv/Fm, PIABS, and Chl in response to wastewater suggested Fv/Fm as an accurate tool for stress forecasting. The high salt concentration in wastewater induced high accumulation of H2O2, lipid peroxidation, inhibition of photosynthesis, and reduction in contents of proteins and carbohydrates, which resulted in growth suppression of all cultivars. Taken together, the negative effect of environmental pollution on crop can be detected at an early stage of stress using Fv/Fm as a fast and accurate tool to prevent irrecoverable damage to plants.

Effect of Crude Oil on Growth, Oxidative Stress and Response of Antioxidative System of Two Rye (Secale cereale L.) Varieties

“…It is known that the photosynthetic apparatus of plants in general and their chlorophyll level in particular are very sensitive to unfavorable factors. Despite the fact that, in some studies, it was shown that content of chlorophylls is not an accurate tool for forecasting plant response to environmental stress [ 40 ], the content of photosynthetic pigments in leaves turns out to be an indirect indicator reflecting the efficiency of photosynthesis. As shown in previous research [ 41 ], mechanisms of inhibitory effects of polycyclic aromatic hydrocarbons on photosynthetic processes includes damage to the lipid bilayer of the plasma membrane and then violation of lipid bilayer membranes of cell organelles and generation of ROS.…”

Effects of ectomycorrhizal fungi (Suillus variegatus) on the growth, hydraulic function, and non-structural carbohydrates of Pinus tabulaeformis under drought stress

“…As the photosynthesis is one of the most important physiological processes for plants to obtain carbon [ 26 ]. When drought stress causes a decrease in photosynthesis, trees are vulnerable to carbon starvation [ 27 ].…”

Drought stress strengthens the link between chlorophyll fluorescence parameters and photosynthetic traits

“…Due to the competition between these three processes, ChlF can be used to obtain photosynthesis information (Maxwell & Johnson, 2000;Murchie & Lawson, 2013). In recent years, researchers have used the changes of ChlF to explore photosynthetic apparatus under different environmental situations (Badr & Brueggemann, 2020;Hajihashemi et al, 2020;Iqbal et al, 2019;Xu et al, 2020).…”