Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings
Strigolactones (SLs) are classified into plant hormones, playing a key role as a mediator of plant growth in response to several abiotic stresses, including drought and salinity. However, the role of SLs in cadmium (Cd)-induced stress to plants is still unknown. The physiological responses of switch...
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doaj-962d93b562464c81b08af910ae1084712020-11-24T21:21:44ZengMDPI AGInternational Journal of Environmental Research and Public Health1660-46012017-07-0114885210.3390/ijerph14080852ijerph14080852Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) SeedlingsZhenglan Tai0Xinqiang Yin1Zhigang Fang2Gaoling Shi3Laiqing Lou4Qingsheng Cai5College of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, ChinaCollege of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, ChinaCollege of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, ChinaProvincial Key Laboratory of Agrobiology, Jiangsu Academy of Agricultural Sciences, 210014 Nanjing, ChinaCollege of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, ChinaCollege of Life Sciences, Nanjing Agricultural University, 210095 Nanjing, ChinaStrigolactones (SLs) are classified into plant hormones, playing a key role as a mediator of plant growth in response to several abiotic stresses, including drought and salinity. However, the role of SLs in cadmium (Cd)-induced stress to plants is still unknown. The physiological responses of switchgrass (Panicum virgatum) stressed in 10 μmol L-1 Cd to exogenous synthetic SLs analog, GR24 were studied in hydroponics. The Cd stress significantly caused the adverse effects on plant growth and root morphology, inhibited photosynthesis, but boosted lipid peroxidation of Switchgrass seedlings. After treatment of 1 μmol L-1 GR24, the above adverse effects caused by Cd stress were significantly alleviated, mainly reflects in improvement of shoot biomass, relative water content, root development, chlorophyll contents, activities of typical antioxidant enzymes, nutrient uptake. The reason for exogenous GR24 alleviating cadmium toxicity might be owing to that exogenous GR24 promoted the content of endogenous SLs, increased some essential element Fe (iron), Zn (zinc), Mn (manganese) and Cu (copper) uptake and reduced cadmium uptake, accumulation and partition in shoot of switchgrass seedlings.https://www.mdpi.com/1660-4601/14/8/852Strigolactonescadmiumroot architecturesubcellular distributionantioxidant enzymesendogenous GR24 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhenglan Tai Xinqiang Yin Zhigang Fang Gaoling Shi Laiqing Lou Qingsheng Cai |
spellingShingle |
Zhenglan Tai Xinqiang Yin Zhigang Fang Gaoling Shi Laiqing Lou Qingsheng Cai Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings International Journal of Environmental Research and Public Health Strigolactones cadmium root architecture subcellular distribution antioxidant enzymes endogenous GR24 |
author_facet |
Zhenglan Tai Xinqiang Yin Zhigang Fang Gaoling Shi Laiqing Lou Qingsheng Cai |
author_sort |
Zhenglan Tai |
title |
Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings |
title_short |
Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings |
title_full |
Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings |
title_fullStr |
Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings |
title_full_unstemmed |
Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass (Panicum virgatum) Seedlings |
title_sort |
exogenous gr24 alleviates cadmium toxicity by reducing cadmium uptake in switchgrass (panicum virgatum) seedlings |
publisher |
MDPI AG |
series |
International Journal of Environmental Research and Public Health |
issn |
1660-4601 |
publishDate |
2017-07-01 |
description |
Strigolactones (SLs) are classified into plant hormones, playing a key role as a mediator of plant growth in response to several abiotic stresses, including drought and salinity. However, the role of SLs in cadmium (Cd)-induced stress to plants is still unknown. The physiological responses of switchgrass (Panicum virgatum) stressed in 10 μmol L-1 Cd to exogenous synthetic SLs analog, GR24 were studied in hydroponics. The Cd stress significantly caused the adverse effects on plant growth and root morphology, inhibited photosynthesis, but boosted lipid peroxidation of Switchgrass seedlings. After treatment of 1 μmol L-1 GR24, the above adverse effects caused by Cd stress were significantly alleviated, mainly reflects in improvement of shoot biomass, relative water content, root development, chlorophyll contents, activities of typical antioxidant enzymes, nutrient uptake. The reason for exogenous GR24 alleviating cadmium toxicity might be owing to that exogenous GR24 promoted the content of endogenous SLs, increased some essential element Fe (iron), Zn (zinc), Mn (manganese) and Cu (copper) uptake and reduced cadmium uptake, accumulation and partition in shoot of switchgrass seedlings. |
topic |
Strigolactones cadmium root architecture subcellular distribution antioxidant enzymes endogenous GR24 |
url |
https://www.mdpi.com/1660-4601/14/8/852 |
work_keys_str_mv |
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