CAJ | 학술논문

用梯度浓度的2,4-D处理黄瓜幼苗,随着2,4-D浓度增加,黄瓜叶片内产生一系列生理变化:O2-浓度上升;OH浓度先上升最终又下降;丙二醛浓度增加;细胞膜相对透过率增大;抗氧化酶SOD和APX活性先上升后又下降;抗氧化物ASC质量分数下降;同时含铁蛋白增加以吸收叶片内游离铁,由此抑制铁催化的Fenton反应,从而缓解机体受到的氧化伤害.
용제도농도적2,4-D처리황과유묘,수착2,4-D농도증가,황과협편내산생일계렬생리변화:O2-농도상승;OH농도선상승최종우하강;병이철농도증가;세포막상대투과솔증대;항양화매SOD화APX활성선상승후우하강;항양화물ASC질량분수하강;동시함철단백증가이흡수협편내유리철,유차억제철최화적Fenton반응,종이완해궤체수도적양화상해.
The effect of ferritin in cucumber leaves on the protection against oxidative stress induced by 2, 4-D was studied. The results showed that there were a series of physiological changes in cucumber leaves with the increase of 2, 4-D concentration. O2- radicals concentration increased; OH radicals concentration rose at first but fell eventually; MDA concentration rose and the relative penetrability of cell membrane increased. Some antioxidant mechanisms in organism were activated to relieve the damage to leaves. Antioxidant enzymes SOD and APX activities rose and then fell; antioxidant ASC concentration decreased. At the same time, ferritin increased to absorb free iron in leaves. Consequently,the iron-catalyzed Fenton reaction would be inhibited, thus relieving the oxidative damage to organisms.