Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (3): 566-572.DOI: 10.1016/S2095-3119(15)61201-1

• 论文 • 上一篇    下一篇

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

 CHENG Bo, LIAN Hai-feng, LIU Ying-ying, YU Xin-hui, SUN Ya-li, SUN Xiu-dong, SHI Qing-hua, LIU Shi-qi   

  1. 1、State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops  (Huanghuai Region), Ministry of Agriculture/College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an 271018,P.R.China
    2、Institute of Science and Technology Information, Shandong Academy of Agricultural Sciences, Jinan 250100, P.R.China
  • 收稿日期:2015-03-17 出版日期:2016-03-07 发布日期:2016-03-09
  • 通讯作者: LIU Shi-qi, Tel: +86-538-8246818,E-mail: liusq99@sdau.edu.cn, liulucky99@163.com
  • 基金资助:

    This work was funded by the Agricultural Research Special Funds for Public Welfare Projects from the Ministry of Agriculture of the People’s Republic of China (200903018).

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

 CHENG Bo, LIAN Hai-feng, LIU Ying-ying, YU Xin-hui, SUN Ya-li, SUN Xiu-dong, SHI Qing-hua, LIU Shi-qi   

  1. 1、State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Biology and Genetic Improvement
    of Horticultural Crops (Huanghuai Region), Ministry of Agriculture/College of Horticultural Science and Engineering, Shandong
    Agricultural University, Tai’an 271018, P.R.China
    2、Institute of Science and Technology Information, Shandong Academy of Agricultural Sciences, Jinan 250100, P.R.China
  • Received:2015-03-17 Online:2016-03-07 Published:2016-03-09
  • Contact: LIU Shi-qi, Tel: +86-538-8246818,E-mail: liusq99@sdau.edu.cn, liulucky99@163.com
  • Supported by:

    This work was funded by the Agricultural Research Special Funds for Public Welfare Projects from the Ministry of Agriculture of the People’s Republic of China (200903018).

摘要: A hydroponic study was conducted to determine the effects of selenium (Se: 0, 3, 6 μmol 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 μmol 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 Fv/Fm 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.

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

Abstract: A hydroponic study was conducted to determine the effects of selenium (Se: 0, 3, 6 μmol 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 μmol 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 Fv/Fm 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.

Key words: selenium , sulfur , garlic , antioxidant activity , oxidative stress , senescence