Journal
PLANT GROWTH REGULATION
Volume 62, Issue 1, Pages 71-76Publisher
SPRINGER
DOI: 10.1007/s10725-010-9489-2
Keywords
Alginate-derived oligosaccharide; Wheat; Cadmium; Plant biomass; Antioxidant enzymes
Categories
Funding
- 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]
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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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