The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.)
High nitrate (NO3−) in vegetables, especially in leaf vegetables poses threaten to human health. Selenium (Se) is an important element for maintaining human health, and exogenous Se application during vegetable and crop production is an effective way to prevent Se deficiency in human bodies. Exogeno...
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Elsevier
2018-04-01
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Series: | Journal of Integrative Agriculture |
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Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311917617593 |
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record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bo LEI Zhong-hua BIAN Qi-chang YANG Jun WANG Rui-feng CHENG Kun LI Wen-ke LIU Yi ZHANG Hui FANG Yun-xin TONG |
spellingShingle |
Bo LEI Zhong-hua BIAN Qi-chang YANG Jun WANG Rui-feng CHENG Kun LI Wen-ke LIU Yi ZHANG Hui FANG Yun-xin TONG The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) Journal of Integrative Agriculture selenium NO3− nitrogen metabolism enzyme SIET photosynthetic performance lettuce |
author_facet |
Bo LEI Zhong-hua BIAN Qi-chang YANG Jun WANG Rui-feng CHENG Kun LI Wen-ke LIU Yi ZHANG Hui FANG Yun-xin TONG |
author_sort |
Bo LEI |
title |
The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) |
title_short |
The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) |
title_full |
The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) |
title_fullStr |
The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) |
title_full_unstemmed |
The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.) |
title_sort |
positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (lactuca sativa l.) |
publisher |
Elsevier |
series |
Journal of Integrative Agriculture |
issn |
2095-3119 |
publishDate |
2018-04-01 |
description |
High nitrate (NO3−) in vegetables, especially in leaf vegetables poses threaten to human health. Selenium (Se) is an important element for maintaining human health, and exogenous Se application during vegetable and crop production is an effective way to prevent Se deficiency in human bodies. Exogenous Se shows positive function on plant growth and nutrition uptake under abiotic and/or biotic stresses. However, the influence of exogenous Se on NO3− accumulation in hydroponic vegetables is still not clear. In the present study, hydroponic lettuce plants were subjected to six different concentrations (0, 0.1, 0.5, 5, 10 and 50 µmol L−1) of Se as Na2SeO3. The effects of Se on NO3− content, plant growth, and photosynthetic capacity of lettuce (Lactuca sativa L.) were investigated. The results showed that exogenous Se positively decreased NO3− content and this effect was concentration-dependent. The lowest NO3− content was obtained under 0.5 µmol L−1 Se treatment. The application of Se enhanced photosynthetic capacity by increasing the photosynthesis rate (Pn), stomatal conductance (Cs) and the transpiration efficiency (Tr) of lettuce. The transportation and assimilation of NO3− and activities of nitrogen metabolism enzymes in lettuce were also analysed. The NO3− efflux in the lettuce roots was markedly increased, but the efflux of NO3− from the root to the shoot was decreased after treated with exogenous Se. Moreover, Se application stimulated NO3− assimilation by enhancing nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS) and glutamate synthase enzyme (GOGAT) activities. These results provide direct evidence that exogenous Se shows positive function on decreasing NO3− accumulation via regulating the transport and enhancing activities of nitrogen metabolism enzyme in lettuce. We suggested that 0.5 µmol L−1 Se can be used to reduce NO3− content and increase hydroponic lettuce yield. |
topic |
selenium NO3− nitrogen metabolism enzyme SIET photosynthetic performance lettuce |
url |
http://www.sciencedirect.com/science/article/pii/S2095311917617593 |
work_keys_str_mv |
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doaj-edef194db08e4914bc7acb28579faca92021-06-08T04:39:11ZengElsevierJournal of Integrative Agriculture2095-31192018-04-01174837846The positive function of selenium supplementation on reducing nitrate accumulation in hydroponic lettuce (Lactuca sativa L.)Bo LEI0Zhong-hua BIAN1Qi-chang YANG2Jun WANG3Rui-feng CHENG4Kun LI5Wen-ke LIU6Yi ZHANG7Hui FANG8Yun-xin TONG9Key Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaNottingham Trent University, Brackenhurst Campus, Nottingham NG25 0QF, UKKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; Correspondence YANG Qi-chang, Tel: +86-10-82105983, Fax: +86-10-82106021Key Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; CHENG Rui-feng, Tel: +86-10-82106015, Fax: +86-10-82106021Key Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaKey Laboratory of Energy Conservation and Waste Treatment of Agricultural Structures, Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaHigh nitrate (NO3−) in vegetables, especially in leaf vegetables poses threaten to human health. Selenium (Se) is an important element for maintaining human health, and exogenous Se application during vegetable and crop production is an effective way to prevent Se deficiency in human bodies. Exogenous Se shows positive function on plant growth and nutrition uptake under abiotic and/or biotic stresses. However, the influence of exogenous Se on NO3− accumulation in hydroponic vegetables is still not clear. In the present study, hydroponic lettuce plants were subjected to six different concentrations (0, 0.1, 0.5, 5, 10 and 50 µmol L−1) of Se as Na2SeO3. The effects of Se on NO3− content, plant growth, and photosynthetic capacity of lettuce (Lactuca sativa L.) were investigated. The results showed that exogenous Se positively decreased NO3− content and this effect was concentration-dependent. The lowest NO3− content was obtained under 0.5 µmol L−1 Se treatment. The application of Se enhanced photosynthetic capacity by increasing the photosynthesis rate (Pn), stomatal conductance (Cs) and the transpiration efficiency (Tr) of lettuce. The transportation and assimilation of NO3− and activities of nitrogen metabolism enzymes in lettuce were also analysed. The NO3− efflux in the lettuce roots was markedly increased, but the efflux of NO3− from the root to the shoot was decreased after treated with exogenous Se. Moreover, Se application stimulated NO3− assimilation by enhancing nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS) and glutamate synthase enzyme (GOGAT) activities. These results provide direct evidence that exogenous Se shows positive function on decreasing NO3− accumulation via regulating the transport and enhancing activities of nitrogen metabolism enzyme in lettuce. We suggested that 0.5 µmol L−1 Se can be used to reduce NO3− content and increase hydroponic lettuce yield.http://www.sciencedirect.com/science/article/pii/S2095311917617593seleniumNO3−nitrogen metabolism enzymeSIETphotosynthetic performancelettuce |