期刊
PLANT GROWTH REGULATION
卷 62, 期 1, 页码 71-76出版社
SPRINGER
DOI: 10.1007/s10725-010-9489-2
关键词
Alginate-derived oligosaccharide; Wheat; Cadmium; Plant biomass; Antioxidant enzymes
资金
- National Natural Science Foundation of China [30870205]
- Department of Education of Liaoning province Foundation [L2010516]
- Liaoning province Natural Science Foundation [20052053]
- Director Foundation of Experimental Center, Shenyang Normal University [sy200705]
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 mu M 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 cadmiumtoxicity 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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