文献类型： 外文期刊

作者： Cheng Bo ¹ ; Lian Hai-feng ¹ ; Liu Ying-ying; Yu Xin-hui ¹ ; Sun Ya-li ¹ ; Sun Xiu-dong ¹ ; Shi Qing-hua ¹ ; Liu Shi-qi ² ;

作者机构： 1.Shandong Agr Univ, State Key Lab Crop Biol, Minist Sci & Technol, Minist Agr,Coll Hort Sci & Engn,Key Lab Biol & Ge, Tai An 271018, Shandong, Peoples R China

2.Shandong Agr Univ, State Key Lab Crop Biol, Minist Sci & Technol, Mini

关键词： selenium; sulfur; garlic; antioxidant activity; oxidative stress; senescence

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2016 年 15 卷 3 期

页码：

收录情况： SCI

摘要： A hydroponic study was conducted to determine the effects of selenium (Se: 0, 3, 6 mu mol L-1) on senescence-related oxidative stress in garlic plants grown under two sulfur (S) levels. We evaluated the yields of plants harvested at 160 and 200 days after sowing. Plants grown under a low Se dose (0.3 mu mol L-1) at low S level showed higher yields (12.0% increase in fresh weight yield, 13.7% increase in dry weight yield) than the controls, despite a decrease in chlorophyll concentration. Compared with control plants, the Se-treated plants showed lower levels of lipid peroxidation. The Se-treated plants also showed higher activities of glutathione peroxidase and catalase, but lower superoxide dismutase activities. Changes in F-v/F-m values and proline contents were affected more strongly by S than by Se. On the basis of our results, we can conclude that Se plays a key role in the antioxidant systems in garlic seedlings. It delays senescence by alleviating the peroxide stress, but it can be toxic at high levels. A high S level may increase tolerance to high Se concentrations through reducing Se accumulation in plants.