抄録
In order to determine the effect of ABA on ozone injury to rice plants, ethylene production, rate of chlorophyll retention and ozone-sensitivity of rice plants pretreated with ABA solution were investigated. The experiments were carried out in pots using rice plants at the 7-8 leaf stage. The results obtained are summarized as follows; 1. Ethylene production by the leaf blades exposed to ozone increased with the increase in the dosage of ozone. 2. Ethylene production was higher in cv. Nihonbare which was more sensitive to ozone than in cv. Tongil. 3. Pre-treatment with ABA solution one hour before ozone treatment reduced ethylene production by the leaf blades exposed to ozone. 4. The rate of chlorophyll retention decreased following injury, but increased remarkably by the pre-treatment with ABA solution. 5. In conclusion, it could be demonstrated that ozone injury of rice plants can be reduced by the pre-treatment with ABA solution.
