Adsorption mechanism of Ca, Mg, Fe, and Al ions in phosphoric acid-nitric acid solution on 001 × 7 and S957 resins.

Selective removal of Ca and Mg ions using the 001 × 7 resin and Fe and Al ions using the S957 resin is able to achieve the deep purification of the phosphoric acid-nitric acid solution, but the adsorption behaviors of Fe and Al ions are seriously suppressed by phosphoric acid. In order to understand the interaction mechanism of separation processes and the influence of phosphoric acid, we first studied the bonding form of Ca, Mg, Fe, and Al ions on 001 × 7 and S957 resins using FT-IR and XPS techniques; subsequently, quantum chemistry computation was carried out to further explore the bonding mechanism between the functional groups on resins and metal ions. FT-IR and XPS results reveal that for the adsorption process on the 001 × 7 resin, hydroxyls from sulfonic acid groups combine with Ca and Mg ions.

Enhanced Arabidopsis disease resistance against Botrytis cinerea induced by sulfur dioxide.

Sulfur dioxide (SO) is a common air pollutant that has complex impacts on plants. The effect of prior exposure to 30mgm SO on defence against Botrytis cinerea (B. cinerea) in Arabidopsis thaliana and the possible mechanisms of action were investigated.

miR398 and miR395 are involved in response to SO stress in Arabidopsis thaliana.

Sulfur dioxide (SO) is a common air pollutant that has adverse effects on plants. MicroRNAs (miRNAs) are small noncoding RNA that play critical roles in plant development and stress response. In this study, we found that two miRNAs, miR398 and miR395, were differentially expressed in Arabidopsis shoots under SO stress.

NO and HO contribute to SO toxicity via Ca signaling in Vicia faba guard cells.

NO and HO have been implicated as important signals in biotic and abiotic stress responses of plants to the environment. Previously, we have shown that SO exposure increased the levels of NO and HO in plant cells. We hypothesize that, as signaling molecules, NO and HO mediate SO-caused toxicity.

Uncovering microRNA-mediated response to SO2 stress in Arabidopsis thaliana by deep sequencing.

Sulfur dioxide (SO2) is a major air pollutant and has significant impacts on plants. MicroRNAs (miRNAs) are a class of gene expression regulators that play important roles in response to environmental stresses. In this study, deep sequencing was used for genome-wide identification of miRNAs and their expression profiles in response to SO2 stress in Arabidopsis thaliana shoots.