《Table 4 Effects of different concentrations of ZJ0273 on ALS and GST activity at the fourth-leaf st

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《除草剂丙酯草醚对大麦的影响和支链氨基酸对其生长的恢复作用（英文）》

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Within a column，means at the same DAT followed by the same letters are not significantly different by the LSD test at P≤0.05 under completely randomized design.Data were analyzed separately at each measurement time.Values are expressed as mean±SE（n=3）

No significant effect of the lower ZJ0273 concentration（100 mg/L）was observed on ALS activity of barley leaves at 5 or 10 DAT（Table 4），although higher application rates significantly reduced ALS activity.ALS activity was significantly reduced in response to all ZJ0273 application rates when measured at 15 and 20 DAT.With successive increases in ZJ0273 concentrations from 100 to 1000 mg/L，ALS activity dramatically decreased.When plants were treated with 1000 mg/L of ZJ0273，the ALS activity of barley leaves was reduced by 28.3%at 5 DAT，36.3%at 10 DAT，50.2%at 15 DAT，and 57.7%at20 DAT compared with controls.