Thymol Ameliorates Cadmium-Induced Phytotoxicity in the Root of Rice (Oryza sativa) Seedling by Decreasing Endogenous Nitric Oxide Generation
文献类型: 外文期刊
作者: Wang, Ting-Ting 1 ; Shi, Zhi Qi 1 ; Hu, Liang-Bin 3 ; Xu, Xiao-Feng 2 ; Han, Fengxiang X. 4 ; Zhou, Li-Gang 5 ; Chen, 1 ;
作者机构: 1.Jiangsu Acad Agr Sci, Inst Food Qual & Safety, Nanjing 210014, Jiangsu, Peoples R China
2.Nanjing Normal Univ, Coll Life Sci, Nanjing 210064, Jiangsu, Peoples R China
3.Henan Inst Sci & Technol, Dept Food Sci, Xinxiang 453003, Peoples R China
4.Jackson State Univ, Dept Chem & Biochem, Jackson, MS 39217 USA
5.China Agr Univ, Dept Plant Pathol, Beijing 100193, Peoples R China
6.Jiangsu Prov Dept Agr & Forestry, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base, Nanjing 210014, Jiangsu, Peoples R China
关键词: thymol;Oryza sativa;cadmium;nitric oxide;phytotoxicity
期刊名称:JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ( 影响因子:5.279; 五年影响因子:5.269 )
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年卷期:
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收录情况: SCI
摘要: Thymol has been developed as medicine and food preservative due to its immune-regulatory effect and antimicrobial activity, respectively. However, little is currently known about the role of thymol in the modulation of plant physiology. In the present study, we applied biochemical and histochemical approaches to investigate thymol-induced tolerance in rice (Oryza sativa) seedlings against Cd (cadmium) stress. Thymol at 20 mu M recovered root growth completely upon CdCl2 exposure. Thymol pronouncedly decreased Cd-induced ROS accumulation, oxidative injury, cell death, and Cd2+ accumulation in roots. Pharmaceutical experiments suggested that endogenous NO mediated Cd-induced phytotoxicity. Thymol decreased Cd-induced NO accumulation by suppressing the activity of NOS (nitric oxide synthase) and NR (nitrate reductase) in root. The application of NO donor (SNP, sodium nitroprusside) resulted in the increase in endogenous NO level, which in turn compromised the alleviating effects of thymol on Cd toxicity. Such findings may helpful to illustrate the novel role of thymol in the modulation of plant physiology, which may be applicable to improve crop stress tolerance.
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