Selenium induced lower respiratory potential in Glycine max (L.) Merr

Abstract

Effect of selenium (Se) was studied in soybean (Glycine max (L.) Merr.) cv. Olna in Ljubljana, Slovenia. Se was added to plants as foliary spraying. Quantum yield of photosystem II (PSII) and respiratory potential measured as ETS activity of mitochondria were measured two times in the growing season. Respiratory potential was higher in young plants compared to mature plants. Se induced the lowering of respiratory potential. Addition of Se had no effect on quantum yield of photosystem II.

The Physiology and Biochemical Tolerance of Cabbage to Se (VI) Addition to the Soil and by Foliar Spraying

“…The potential quantum yield and effective quantum yield of PSII were unaffected by Se treatment (Table 1). Similar results were obtained for Cucurbita pepo , chicory (Germ et al, 2007b), Eruca sativa , tartary buckwheat (Breznik et al, 2005), soybean (Mechora and Germ, 2010), and Hordeum vulgare (Valkama et al, 2003) (Table 2). Values of F v /F m were close to the theoretical maximum of 0.83 (Schreiber et al, 1995), which indicates reversible inactivation rather Results are expressed as means ± SD of six plants.…”

Influence of selenite and selenate on growth, leaf physiology and antioxidant defense system in wheat (Triticum aestivum L.)

“…Selenium induced decrease in mitochondrial activities were observed in leaves along with Se accumulation. The decrease in ETS activity indicated higher Se‐induced stress to plants as a result the plants cannot cope and therefore respiratory potential drops . The lower photosynthetic efficiency along with lower ETS activity indicated that Se negatively affected the respiratory chain as well as photosynthetic processes.…”

“…The decrease in ETS activity indicated higher Se-induced stress to plants as a result the plants cannot cope and therefore respiratory potential drops. 8 The lower photosynthetic efficiency along with lower ETS activity indicated that Se negatively affected the respiratory chain as well as photosynthetic processes. This might be due to the reason that clusters of iron-sulfur proteins of these organelles can be substituted by iron-Se clusters that are larger in size and do not fit into apoproteins.…”

“…7 Electron transport system (ETS) activity is the measure of the respiratory potential of mitochondria in plants and Se induction can cause the lowering of mitochondrial respiratory potential measured as its ETS activity. 8 Selenium concentrations of 2.3-11.6 mg kg −1 in top soil layer (0-15 cm) of seleniferous regions in Nawanshehar and Hoshiarpur districts of Punjab, northwest India have been reported. 9 Various crop plants grown on these seleniferous soils can accumulate high Se concentration in different plant parts and Se can thus enter into the food chain and become toxic to animal and human organisms.…”

“…Catalase (CAT) also breaks down H 2 O 2 and helps in maintaining cellular redox state whereas glutathione reductase (GR) is essential in defense against ROS induced damage by maintaining redox state of glutathione (GSH) and ascorbate . Electron transport system (ETS) activity is the measure of the respiratory potential of mitochondria in plants and Se induction can cause the lowering of mitochondrial respiratory potential measured as its ETS activity …”