本文選題：阿特拉津 + 狼尾草��； 參考：《生態(tài)毒理學(xué)報》2016年06期

【摘要】：通過盆栽實驗研究了抗性植物狼尾草根部丙二醛(MDA)、脯氨酸(Pro)、抗壞血酸(As A)含量及超氧化物歧化酶(SOD)、谷胱甘肽還原酶(GR)等氧化應(yīng)激生理指標對不同濃度阿特拉津長期(48 d)脅迫的響應(yīng)規(guī)律。結(jié)果表明:當阿特拉津脅迫濃度分別高于20 mg·kg~(-1)和50 mg·kg~(-1)時,狼尾草根系的MDA與Pro含量較對照組顯著升高(P0.05);隨著阿特拉津脅迫濃度的增加,狼尾草根部SOD和GR活性呈先升高后降低的趨勢,其中當阿特拉津脅迫濃度為20 mg·kg~(-1)時,SOD和GR活性達到最大值;供試植物根系中As A含量與阿特拉津脅迫濃度呈正相關(guān)。綜上,中低濃度(≤20 mg·kg~(-1))阿特拉津處理沒有對狼尾草的根系產(chǎn)生明顯的氧化脅迫效應(yīng),狼尾草根系的上述抗氧化應(yīng)激生理指標對于發(fā)揮阿特拉津抗性起著重要的作用。
[Abstract]:In pot experiment, the contents of malondialdehyde (MDAA), proline Pron, ascorbic acid (as A) in the roots of resistant plant, and the effects of oxidative stress physiological indexes, such as superoxide dismutase (SOD), glutathione reductase (Glutathione reductase), etc., on the length of atrazine at different concentrations were studied. The response to stress was observed at 48 d. The results showed that when atrazine concentration was higher than 20 mg kg 路kg -1 and 50 mg kg 路kg ~ (-1), MDA and Pro content in root system were significantly higher than that in control group, and with the increase of atrazine stress concentration. The activity of SOD and gr increased first and then decreased, and the activity of SOD and gr reached the maximum when atrazine concentration was 20 mg kg 路kg ~ (-1), and the content of as in the roots of the tested plants was positively correlated with the stress concentration of atrazine. In conclusion, the medium and low concentration (鈮，

本文編號：2036406