Silicon alleviates oxidative damage of wheat plants in pots under drought
Gong, HJ（School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China）
Chen, KM（Institute of Botany, Chinese Academy of Sciences）
Wang, SM（School of Pastoral Agriculture Science and Technology, Lanzhou University）
Zhang, CL（School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China）
- 生命科学－已发表论文 
Drought-induced changes in oxidative damage to photosynthetic pigments, proteins and lipids, some enzyme activities and photosynthesis were investigated in wheat (Tritician aestivum L.) plants grown in pots applied with or without silicon under drought stress. Three treatments with three replicates were composed of "CK" (control, 2.11 mmol of sodium sulfate Kg(-1) soil), "DR" (drought, 2.11 mmol of sodium sulfate Kg(-1) soil) and "DSi" (drought + silicon, 2.11 mmol of sodium silicate Kg(-1) soil). Drought stress was applied by maintaining 75% of relative water content in the "CK" soil and 50% of relative water content in the drought treatments ("DR" and "DSi") for 12 days from jointing stage, after which the assays were performed on the recent fully expanded leaves. The results showed that application of silicon improved the water status of drought stressed plants. Compared with the non-silicon treatment, application of silicon increased the activities of some antioxidant enzymes: superoxide dismutase (SOD); catalase (CAT) and glutathione reductase (GR), the fatty acid unsaturation of lipids, and the contents of photosynthetic pigments and soluble proteins as well as total thiols under drought, whereas the content of hydrogen peroxide, activity of acid phospholipase (AP) and oxidative stress of proteins were decreased by applying silicon compared with those of non-silicon treatments under drought. The activities of glycolate oxidase (GO), peroxidase (POD) and ascorbate peroxidase (APX) showed no significant difference between "DR" and "DSi". In addition, application of silicon also increased the net CO2 assimilation rate of wheat leaves under drought. It was suggested that the improvement of silicon on drought tolerance of wheat plants was associated with the increase of antioxidant defense abilities, therefore alleviating oxidative damage of cellular functional molecules induced by over produced reactive oxygen species (ROS) under drought and maintaining many physiological processes of stressed plants. The present work also suggested that silicon may be involved in metabolic or physiological activities in higher plants under drought, which coincided with previous studies in salt stressed plants. (c) 2005 Elsevier Ireland Ltd. All rights reserved.
CitationPlant Science，Volume 169, Issue 2, August 2005, Pages 313-321
Showing items related by title, author, creator and subject.
Effect of isoverbascoside, a phenylpropanoid glycoside antioxidant, on proliferation and differentiation of human gastric cancer cell Chen, RC; 陈瑞川; Su, JH（Department of Biology, Lanzhou University, Lanzhou ）; Yang, SM（Department of Biology, Lanzhou University, Lanzhou ）; Li, J（Department of Biology, Lanzhou University, Lanzhou ）; Wang, TJ; Zhou, H (ACTA PHARMACOLOGICA SINICA, 2002)AIM: To investigate the effects of phenylpropanoid glycoside antioxidant isoverbascoside on cell proliferation and differentiation of human gastric cancer cell line MGC 803. METHODS: MGC 803 cells were treated with ...
Li, Chao（Beijing Univ Chem Technol, Dept Pharmaceut Engn）; Tian, Hua（Beijing Univ Chem Technol, Dept Pharmaceut Engn）; Duan, Shan（Beijing Univ Chem Technol, Dept Pharmaceut Engn）; Liu, Xuena（Beijing Univ Chem Technol, Dept Pharmaceut Engn）; Xu, Pengfei（Lanzhou Univ, State Key Lab Appl Organ Chem）; Qiao, Renzhong（Lanzhou Univ, State Key Lab Appl Organ Chem）; Zhao, Yufen; 赵玉芬 (AMER CHEMICAL SOC, 2011-09-14)The condensation of DNA is essential for biological processes such as DNA transcription and replication, and its study receives additional impetus from an interest in gene therapy. Although many efficacious condensing ...
Wang, Fu-dong（Chinese Acad Sci, Lanzhou Inst Chem Phys）; Wang, Tao（ Xiamen Univ, Coll Phys & Mech Elect Engn）; Wu, An-an; 吴安安; Ding, Lan（NW Normal Univ, Coll Life Sci）; Wang, Han-qing（Chinese Acad Sci, Lanzhou Inst Chem Phys） (CHINESE PHYSICAL SOC, 2009)The title compound glaucocalyxin A (1) (7 alpha,14 beta-dihydroxy-ent-kaur-16-en-3,15-dione) isolated from the leaves of isodon excisoides was characterized by IR, H-1 NMR C-13 NMR, H-1-H-1 COSY, HMQC, HMBC, and EIMS, and ...