Responses of the antioxidant defense system to drought stress in the leaves of Fargesia denudata seedlings, the staple food of the giant panda
文献类型：期刊论文
| 作者 | Liu, C. ; Wang, Y. ; Pan, K. ; Li, W. ; Zhang, L. ; Shen, X. ; Liu, L. ; Deng, M. |
| 刊名 | RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 61期号:3页码:374-383 |
| 关键词 | Fargesia denudata drought stress antioxidant defense system reactive oxygen species lipid peroxidation |
| 产权排序 | 1 |
| 通讯作者 | Liu, C (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Peoples R China. |
| 合作状况 | 其它 |
| 英文摘要 | The responses of the antioxidant defense system in plant species to drought stress are still relatively unknown. In order to further understand how the system responds to drought stress, the leaves of Fargesia denudata seedlings were investigated. Antioxidant enzyme activities, antioxidant contents, hydrogen peroxide (H2O2), superoxide anion (O (2) (center dot-) ) and MDA contents in the seedling leaves were measured under well-watered (WW), moderate drought-stressed (MD), and severe drought-stressed (SD) treatments. Although drought stress significantly increased H2O2 and O (2) (center dot-) levels in F. denudata leaves, only weak lipid peroxidation was observed. This is attributed to the higher superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), monodehydroascorbate reductase (MDHAR), and dehydroascorbate reductase (DHAR) activities in F. denudata leaves during the entire drought period. Reduced and oxidized ascorbate (AsA and DHA) contents were almost not affected by drought except that DHA under SD showed an obvious increase on day 30. Furthermore, reduced glutathione (GSH) content under drought stress significantly decreased, while oxidized glutathione (GSSG) markedly increased under SD on days 30 and 45 as well as under MD on day 30; as a result, the ratio GSH/GSSG declined considerably. These results indicated that GSH was involved in scavenging H2O2 and O (2) (center dot-) under drought stress and it was more sensitive to drought stress in scavenging H2O2 and O (2) (center dot-) than AsA. As a result, a highly efficient antioxidant defense system in drought-stressed F. denudate leaves operated mainly through the synergistic functioning of SOD, CAT, APX, MDHAR, DHAR, GR, and GSH against oxidative damage. |
| 学科主题 | Plant Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://210.75.237.14/handle/351003/26535]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Liu, C.,Wang, Y.,Pan, K.,et al. Responses of the antioxidant defense system to drought stress in the leaves of Fargesia denudata seedlings, the staple food of the giant panda[J]. RUSSIAN JOURNAL OF PLANT PHYSIOLOGY,2014,61(3):374-383. |
| APA | Liu, C..,Wang, Y..,Pan, K..,Li, W..,Zhang, L..,...&Deng, M..(2014).Responses of the antioxidant defense system to drought stress in the leaves of Fargesia denudata seedlings, the staple food of the giant panda.RUSSIAN JOURNAL OF PLANT PHYSIOLOGY,61(3),374-383. |
| MLA | Liu, C.,et al."Responses of the antioxidant defense system to drought stress in the leaves of Fargesia denudata seedlings, the staple food of the giant panda".RUSSIAN JOURNAL OF PLANT PHYSIOLOGY 61.3(2014):374-383. |
入库方式： OAI收割
来源：成都生物研究所
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