| Effects of nitric oxide, an indirect reaction production of NO2-, on the physiological functions of maize under cadmium stress |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2016.01.25 |
| Key Words: NO S-nitroso-glutathione cadmium stress maize physiological functions |
| Author Name | Affiliation | | JIA Jia | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China | | XU Yi-xin | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Jia | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China | | FAN Wen-qiang | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China | | HU Jing-jiang | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China | | MU Zi-xin | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China |
|
| Hits: 1477 |
| Download times: 960 |
| Abstract: |
| Gaseous signaling molecule nitric oxide (NO) is proven in many plants to be able to alleviate cadmium (Cd) stress. Under acidic conditions, glutathione (GSH) can react with sodium nitrite (NaNO2) to generate S-nitroso-glutathione (GSNO), which can release NO. The present work was to study whether this type of NO could help maize seedlings (Zea mays L.) to resist Cd stress. Different concentrations of GSNO (50, 125, 250 μmol·L-1, and 350 μmol·L-1) were applied to maize seedlings that had been subjected to 80 mg·L-1 CdCl2 for 7 d. The results showed that GSNO could significantly improve maize seedlings plant height, stem diameter, and leaf area, especially at the 250 μmol·L-1 GSNO concentration; The addition of 350 μmol·L-1 GSNO couldmaintain photosynthetic pigment maximization, effectively alleviate leaf yellowing; The benificial effects of GSNO (optimum concentration was in the range of 150～250 μmol·L-1) on Cd-stressed maize might be related to the enhanced antioxidant enzyme activity, such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and peroxidase (POD), and decreased levels of H2O2 and O2·; Furthermore, GSNO greatly enhanced the capacity of maize seedlings to chelate heavy metal ions which optimal GSNO concentration was 250 μmol·L-1. |
|
|
|