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Leaf Gas Exchange of Maize Plants Fumigated with Sulfur Dioxide
Author(s) -
Gerini O.,
Guidi L.,
Lorenzini G.,
Soldatini G. F.
Publication year - 1990
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1990.00472425001900010024x
Subject(s) - fumigation , photosynthesis , transpiration , chemistry , stomatal conductance , sulfur dioxide , carbon dioxide , zea mays , sulfur , horticulture , agronomy , botany , biology , inorganic chemistry , biochemistry , organic chemistry
Leaf gas exchange was measured in maize ( Zea mays L.) plants that had been exposed continuously for a period of 4 wk to a range of SO 2 concentrations applied in fumigation chambers. Exposure to a constant SO 2 level of 43 and 71 nLL −1 induced a decrease in the apparent photosynthesis and quantum yield, and an increase in the stomatal conductance and transpiration rate in comparison to the charcoal‐air filtered controls. This would suggest that the reduction in photosynthesis observed was mainly due to nonstomatal components, i.e., the direct effect of SO 2 on the mesophyll.