Hydrogen sulfide (HS), as a gaseous messenger molecule, plays critical roles in signal transduction and biological modulation. In the present study, the roles of HS in regulating chlorophyll (Chl) and carotenoid (Car) contents to improve photosynthesis in tall fescue were investigated under low-light (LL) stress. Compared to control conditions, LL stress significantly reduced total biomass, net photosynthetic rate (P), maximal quantum yield of photosystem II (PSII) photochemistry (F/F), and the contents of Chl and Car.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
February 2022
Sewage sludge-derived biochars (SSBCs) were obtained at temperatures of 300, 500, and 700 °C to investigate the potentially toxic elements (PTEs) behaviors and assess the environmental acceptability for the possible application in the environment. Results indicated that PTEs exhibited diversely in the distribution of chemical speciation, while all elements tended to be immobilized in biochar matrix and the total amount elevated during the pyrolysis. The risk assessment of biochars implied a low degree of environmental risk for the utilization of SSBCs prepared at high temperatures.
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