Differential Responses in Activity of Antioxidant Enzymes to Different Environmental Stresses in Arabidopsis thaliana

被引：11

作者：

Akihiro Kubo

Mitsuko Aono

Nobuyoshi Nakajima

Hikaru Saji

Kiyoshi Tanaka

Noriaki Kondo

机构：

[1] Environmental Biology Division,

[2] National Institute for Environmental Studies,undefined

[3] 16–2 Onogawa,undefined

[4] Tsukuba,undefined

[5] Ibaraki,undefined

[6] 305–0053 Japan,undefined

[7] Regional Environment Division,undefined

[8] National Institute for Environmental Studies,undefined

[9] 16–2 Onogawa,undefined

[10] Tsukuba,undefined

[11] Ibaraki,undefined

[12] 305–0053 Japan,undefined

[13] Faculty of Agriculture,undefined

[14] Tottori University,undefined

[15] Koyama,undefined

[16] Tottori,undefined

[17] 680–0945 Japan,undefined

[18] Department of Biological Sciences,undefined

[19] Graduate School of Science,undefined

[20] The University of Tokyo,undefined

[21] Bunkyo-ku,undefined

[22] Tokyo,undefined

[23] 113–0033 Japan,undefined

来源：

Journal of Plant Research | 1999年 / 112卷

关键词：

Keywords: Active oxygen, Antioxidant enzyme, Arabidopsis thaliana, Environmental stress, Enzymatic activity, Phenylpropanoid;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

. Three-week-old plants were exposed to a high temperature (30 C), an enhanced light intensity (200 μE/m2/sec), water deficiency (water deprivation for 2 days), a chilling temperature (5 C), or ultraviolet-B (UV-B) radiation (0.25 or 0.094 W/m2) for 1 week (except for water deficiency). The high temperature and enhanced light treatments increased only dehydroascorbate reductase (DHAR) activity. Water deficiency enhanced the activities of DHAR and guaiacol peroxidase (PER). Chilling temperature increased the activities of ascorbate peroxidase (APX) and glutathione reductase (GR), whereas it decreased catalase (CAT) activity. UV-B at an intensity of 0.25 W/m2 elevated the activities of APX, monodehydroascorbate reductase (MDHAR), GR, PER and superoxide dismutase (SOD). It was suggested that the amounts of phenylpropanoid compounds increased during treatments of plants with enhanced light intensity, chilling temperature, and UV-B. These results suggest that some differences exist among the oxidative stress conditions caused by the different treatments, although all of these treatments seem to be related to active oxygen production. We propose that in A. thaliana, environmental stresses may be classified into those which induce DHAR activity and those which induce APX activity.

引用

页码：279 / 290

页数：11