Protective Action and Mechanism of TNA on Rice

Protective action of TNA on rice and antidotal mechanism of TNA to chlorimuron ethyl had been studied. The rice growth was influenced at a chlorimuron ethyl residue level of 10μg·kg-1 . The higher residue level of chlorimuron-ethyl, the more inhibition of rice growth was obvious. TNA was applied at the rate of 50 mg·kg-1(Soaked seed) or 200 mg·kg-1(Treated leave ), the rices could observed recover from injury of chlorimuron-ethyl. TNA obviously increased Glutathione S-transferase (GST) activity and Glutathione (GSH), polyphenol and proline content in rice. TNA protect rice by increasing GST activity, which results in accelerated detoxification of chlorimuron-ethyl via GSH conjugation.