Effect of cerium (Ce) on the redox states of ascorbate and glutathione through ascorbate-glutathione cycle in the roots of maize seedlings under salt stress
Effect of cerium (Ce) on the redox states of ascorbate and glutathione through ascorbate-glutathione cycle in the roots of maize seedlings under salt stress
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DOI：
10.1556/0806.45.2017.057
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发表时间：
2018-01
影响因子：
1.6
通讯作者：
H. Hu;C. Shan
中科院分区：
文献类型：
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作者：
H. Hu;C. Shan
本研究调查了铈 (Ce) 对盐胁迫下玉米幼苗根部抗坏血酸-谷胱甘肽 (AsA-GSH) 循环的影响。结果表明，与对照相比，盐胁迫显着增加了玉米幼苗根部抗坏血酸过氧化物酶（APX）和单脱氢抗坏血酸还原酶（MDHAR）的活性、丙二醛（MDA）含量和电解质渗漏（EL）。然而，与对照相比，盐胁迫显着降低了玉米幼苗的株高、根和地上部干重、谷胱甘肽还原酶（GR）和脱氢抗坏血酸还原酶（DHAR）活性以及根部AsA/DHA和GSH/GSSG比值。与单独盐胁迫相比，硝酸铈（Ce(NO3)3）预处理显着提高了盐胁迫下的株高、根冠干重、上述四种酶的活性以及AsA/DHA和GSH/GSSG比值。与单独盐胁迫相比，Ce(NO3)3 预处理显着降低了盐胁迫诱导的 MDA 含量和 EL。同时，与对照相比，施用Ce(NO3)3也显着提高了对照的株高、根冠干重、上述四种酶的活性以及AsA/DHA和GSH/GSSG比值，降低了MDA含量和EL。我们的结果表明，Ce(NO3)3 通过改善玉米根部的 AsA-GSH 循环来减轻盐胁迫诱导的氧化损伤。
This study investigated the effect of cerium (Ce) on the ascorbate-glutathione (AsA-GSH) cycle in the roots of maize seedlings under salt stress. The results showed that salt stress significantly increased the activities of ascorbate peroxidase (APX) and monodehydroascorbate reductase (MDHAR), malondialdehyde (MDA) content and electrolyte leakage (EL) in the roots of maize seedlings, compared to the control. However, salt stress significantly decreased plant height, dry weight of root and shoot, the activities of glutathione reductase (GR) and dehydroascorbate reductase (DHAR), and the ratios of AsA/DHA and GSH/GSSG in the roots of maize seedlings, compared to the control. Pretreatment with cerium nitrate (Ce(NO3)3) significantly increased plant height, dry weight of root and shoot, the activities of above four enzymes, and the ratios of AsA/DHA and GSH/GSSG under salt stress, compared to salt stress alone. Pretreatment with Ce(NO3)3 significantly decreased MDA content and EL induced by salt stress, compared to salt stress alone. Meanwhile, application of Ce(NO3)3 to the control also significantly increased plant height, dry weight of root and shoot, the activities of above four enzymes and the ratios of AsA/DHA and GSH/GSSG, and decreased MDA content and EL, compared with control. Our results suggested that Ce(NO3)3 alleviated salt stress-induced oxidative damage by improving AsA-GSH cycle in maize roots.