Sulfur dioxide physiological effect

These data and those of others (1, 5, 6, 26, 27) indicate a change in growth rate and/or a reduction in leaf area after prolonged exposure to sulfur dioxide. These effects indicate possible alterations in the normal physiological functioning of the plant, and therefore probably have both a visible (ultrastructure) and biochemical basis. 

G-3 Sulfur Dioxide. Presents information on the properties, physiological effects, first aid, safety, security and emergency action, manufacture, transportation, storage, handling, and use of sulfur dioxide (50 pages). 

Sulfur dioxide is classified by DOT as a nonflammable gas. In both its gaseous and liquid form it is neither flammable nor explosive. It is a respiratory and a skin and eye irritant. Consult CGA G-3, Sulfur Dioxide, for information concerning chemical and physical properties, physiological effects, personal protective equipment, and emergency action procedures. [7] CGA G-3 also provides numerous recommendations for handling and unloading all types of sulfur dioxide shipping containers. 

---