ResultsTemperature and relative humidity between control and ozone treatment is in the range 34-38 ° C and 51-64 percent, respectively, with no statistically significant difference. The experiments have been rubber ozone concentration of 200.Found that the rate of net photosynthesis (pn), where the stomata (stomatal conductance,.gs), transpiration rate, water (tr) and the characteristics of the leaves after the cabinet no different. For the response to light, the rate of photosynthesis between the control and ozone treatments to find a similar response.0-1000 μmol ppfd m-2 s-1, but when the light intensity higher than 1000 μmol ppfd m-2 s-1, the rate of photosynthesis to a constant value (figure 1) values obtained from measuring light. response curve of the tree control and ozone treatments.(Α) with 0.041-.063 average value controls the curvature of the graph (θ) values from 0.63 to 0.69, the average of the maximum rate of photosynthesis (pmax) were 11.6 - 18.1 μmol co2 m-2 s-1 and the average rate. Dark respiration (rd) is 0.15 - 0.44 μmol co2 m-2 s-1, with no significant difference statistically (table 1)
figure 1 net photosynthesis rate (pn) in response to photosynthetic photon flux density (ppfd) of hevea brasiliensis exposed to ambient air and ozone. (200 ppb for 2 hr). the observed data were fitted by using a non-rectangular hyperbola equation as a model. submarines.Agricultural Science Volume 43, No. 2 (Special) May - August 2555 19
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