Sand priming in relation to physiological changes in seed germination and seedling growth of waxy maize under high-salt stress
Seeds of three waxy maize (Zea mays L.) cultivars, cv. Suyunuo 1, Huyunuo 1 and Zhenuoyu 1, were used to investigate the effects of sand priming on germination and physiological changes under a high-salt concentration (1% NaCl) stress. Waxy maize seeds were mixed with sand containing 4% (v/w) water, sealed in plastic box, and then were primed at 15°C for 48 h. While sand priming significantly affected the speed of germination in two cultivars, and contributed to shorten mean germination time for the three cultivars studied. It also significantly enhanced shoot height, seedling fresh and dry weight in the three cultivars compared to unprimed control. Sand priming also increased the content of soluble sugar and the activities of peroxidase (POD) and catalase (CAT). At the same time, the malondialdehyde (MDA) and proline (Pro) accumulation decreased under a high-salt stress condition. Thus, it indicated that sand priming could improve speed of germination and seedling growth, suggesting beneficial effects on salt tolerance of waxy maize seedlings.
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Document Type: Research Article
Publication date: October 1, 2007
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