Abstract
Hydroponic experiments were carried out to study the role of alginate-derived oligosaccharides (ADO) in enhancing wheat (Triticum aestivum L.) tolerance to cadmium stress. Data were collected on plant biomass, chlorophyll content, photosynthetic rate, antioxidant enzyme activity and malondialdehyde (MDA) content. Under 100 μM Cd stress, plant growth was significantly inhibited. Shoot length, root length, fresh and dry weight were sharply reduced by 24.21, 34.59, 22.1 and 14.7%, respectively of the control after 10 day of Cd exposure. Superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activities were increased and MDA content increased. Wheat seeds were soaked for 5 h in 1,000 mg L−1 ADO solution before cadmium stress. ADO pretreatment alleviated cadmium toxicity symptoms, which were reflected by increasing root and shoot lengths, fresh and dry weight, chlorophyll content and photosynthetic rate (P n ). Furthermore, ADO pretreatment significantly increased antioxidant enzyme (SOD, CAT and POD) activities and reduced MDA content in leaves and roots. The results indicated that ADO pretreatment partially protected the seedlings from cadmium toxicity during the following growth period.
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This work was supported by the National Natural Science Foundation of China (30870205), the Department of Education of Liaoning province Foundation (L2010516) and the Liaoning province Natural Science Foundation (20052053) and Director Foundation of Experimental Center, Shenyang Normal University (sy200705).
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Ma, L.J., Li, X.M., Bu, N. et al. An alginate-derived oligosaccharide enhanced wheat tolerance to cadmium stress. Plant Growth Regul 62, 71–76 (2010). https://doi.org/10.1007/s10725-010-9489-2
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DOI: https://doi.org/10.1007/s10725-010-9489-2