L. Maurousset, P. Raymond, Monique Caudillert
1992
Citations
0
Influential Citations
10
Citations
Journal
Physiologia Plantarum
Abstract
As in other materials, sodium sulfite (Na2SO3) inhibited both respiration and photosynthesis in leaf tissues of broad-bean L. cv. Aguadulce). Under our experimental conditions, photosynthesis was more sensitive (significant inhibition at 10 μM) to the pollutant than respiration (significant inhibition only for concentrations higher than 0.1 mM). Sulfite concentrations higher than 0.1 mM also caused the energy charge of leaf tissues to decline sharply. These results suggest that the long, term depolarization of the transmembrane potential difference noticed for concentrations of pollutant higher than 0.1 mM (Maurousset and Bonnemain, Physiol. Plant. 80: 233–237,1990) was mainly due to an indirect inhibition of the plasma membrane H+-ATPase activity following the decrease of the available level of ATP.