研究了二氯喹啉酸胁迫条件下,向土壤施入降解菌对烤烟叶片中活性氧及保护酶的影响。结果表明,移栽后20 d时,与对照相比,施入降解菌能降低烟叶中超氧阴离子自由基(O2.-)、羟自由基(.OH)、过氧化氢(H2O2)和丙二醛(MDA)含量,分别降低了23%、39%、25%、49%;能提高烟叶中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)及过氧化物酶(POD)活性,分别提高了66%、51%、48%。总体上,随着降解菌施入量的增加,烟叶中防御酶活性提高,MDA和活性氧含量降低,在每克干土中施入降解菌量为3×1010个时缓解二氯喹啉酸胁迫效果最好。 The effects of applying degradative bacteria to soil on reactive oxygen species and protective enzymes in flue-cured tobacco leaves under quinclorac acid stress were studied. The results showed that 20 d after transplanting, degrading bacteria could reduce the content of superoxide anion radical (O2.-), hydroxyl radical (.OH), hydrogen peroxide (H2O2) and propanediol Aldehydes and malondialdehyde (MDA) contents of tobacco leaves decreased by 23%, 39%, 25% and 49%, respectively. The contents of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) Respectively, increased by 66%, 51%, 48%. In general, with the increase of degrading bacteria, defense enzyme activities in tobacco leaves increased, and the content of MDA and reactive oxygen species decreased. Quikale acid stress was relieved when the amount of degrading bacteria per gram of dry soil was 3 × 1010 best effect.