Antioxidative responses of Calendula officinalis under salinity conditions
Antioxidative responses of Calendula officinalis under salinity conditions
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DOI：
10.1016/j.plaphy.2004.07.001
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发表时间：
2004-09-01
影响因子：
6.5
通讯作者：
Navari-Izzo, F
中科院分区：
文献类型：
--
作者：
Chaparzadeh, N;D'Amico, ML;Navari-Izzo, F
为了更好地了解长期盐诱导的氧化应激，研究了万寿菊（Calendula offtcinalis L.）在0、50和100 mM NaCl条件下，盐度影响了大多数考虑的参数。高盐度导致生长参数降低，脂质过氧化和过氧化氢积累。在高盐胁迫下，叶片中总谷胱甘肽含量下降，总抗坏血酸（阿萨+ DHA）含量增加，同时谷胱甘肽还原酶（GR，EC 1.6.4.2）和抗坏血酸过氧化物酶（APX，EC 1.11.1.11）活性增强。此外，盐度诱导超氧化物歧化酶（SOD，EC 1.15.1.1）和过氧化物酶（POX，EC 1.11.1.7）的活动减少。脱氢抗坏血酸还原酶（达尔，EC 1.8.5.1）和单脱氢抗坏血酸还原酶（MDHAR，EC 1.6.5.4）活性的降低表明其它机制在还原的抗坏血酸的再生中起主要作用。过氧化氢酶（CAT，EC 1.11.1.6）活动的变化，在根和叶中，可能是重要的H2O2稳态。(C)2004年，Elsevier SAS。All rights reserved.
To gain a better insight into long-term salt-induced oxidative stress, some physiological parameters in marigold (Calendula offtcinalis L.) under 0, 50 and 100 mM NaCl were investigated. Salinity affected most of the considered parameters. High salinity caused reduction in growth parameters, lipid peroxidation and hydrogen peroxide accumulation. Under high salinity stress, a decrease in total glutathione and an increase in total ascorbate (AsA + DHA), accompanied with enhanced glutathione reductase (GR, EC 1.6.4.2) and ascorbate peroxidase (APX, EC 1.11.1.11) activities, were observed in leaves. In addition, salinity induced a decrease in superoxide dismutase (SOD, EC 1.15.1.1) and peroxidase (POX, EC 1.11.1.7) activities. The decrease in dehydroascorbate reductase (DHAR, EC 1.8.5.1) and monodehydroascorbate reductase (MDHAR, EC 1.6.5.4) activities suggests that other mechanisms play a major role in the regeneration of reduced ascorbate. The changes in catalase (CAT, EC 1.11.1.6) activities, both in roots and in leaves, may be important in H2O2 homeostasis. (C) 2004 Elsevier SAS. All rights reserved.