Biologia plantarum 42:267-272, 1999 | DOI: 10.1023/A:1002168820518
Stomatal Closure During Tobacco Leaf Desiccation as Affected by Ozone
- 1 Tartu Department, Institute of Ecology, Tartu, Estonia
- 2 Institute of Botany and Ecology, University of Tartu, Tartu, Estonia
The effect of acute ozone exposure on the stomatal conductance and leaf water content during rapid desiccation was examined in leaves of two tobacco cultivars, ozone sensitive cv. BelW3 and ozone tolerant cv. Samsun. The relative rate of stomatal closure was constant during leaf desiccation in cv. Samsun but decreased in cv. BelW3 in both ozonated and control plants. Ozone exposure increased the relative rate of stomatal closure and transpiration rate (measured on the following day) in cv. Samsun, but reduced the respective parameters in cv. BelW3. As a result, the plants of ozone-sensitive cultivar, treated with ozone, lost more water during desiccation than control plants.
Keywords: leaf water content; Nicotiana tabacum; sensitive and tolerant cultivars; stomatal conductance
Subjects: cultivars, ozone tolerance; desiccation, stomata, ozone; Nicotiana tabacum; ozone, tolerance, desiccation; stomata, closure rate, ozone; stomatal conductance, ozone, desiccation; tobacco, stomata, desiccation
Published: September 1, 1999 Show citation
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