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- Title
Inhibition of Net Photosynthesis in Tomato in Air Polluted with NO and NO2.
- Authors
CAPRON, T. M.; MANSFIELD, T. A.
- Abstract
A 4 × 4 factorial experiment was conducted to examine the effects of air polluted with 0, 10, 25, and 50 parts 10 of NO and NO on the rate of photosynthesis in tomato. Both gases reduced net photosynthesis to approximately the same extent, from a mean rate of 13·03 in the controls to 9·40 in 50 parts 10 NO and 8·84 in 50 parts 10 NO (all values in mg CO dm h). There was no evidence of any interaction between the two pollutants, but their effects were nearly additive over parts of the concentration range tested. Tomato appears to be more sensitive to the presence of nitrogen oxides in the atmosphere than other species so far investigated. NO and NO are generated by hydrocarbon burners used to provide CO enrichment for glasshouses, and can accumulate in concentrations within the range employed in this experiment.
- Publication
Journal of Experimental Botany, 1976, Vol 27, Issue 6, p1181
- ISSN
0022-0957
- Publication type
Article