Effects of selenium and sulfur on antioxidants and physiological parameters of garlic plants during senescence

文献类型: 外文期刊

第一作者: Cheng Bo

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

作者机构:

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.

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