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Chilling tolerance of maize (Zea mays L.) can be improved by seed soaking in putrescine

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Response surface analysis (RSA) experiment with two factors (putrescine (Put) concentration and seed soaking time) of 14 combinations was performed to investigate the effects on improving seed vigor under chilling stress in maize (Zea mays L.) cv. Mo17 (chilling-sensitive). After soaking treatment, treated seeds were germinated suffering low temperature stress at 5°C for three days. Then, the dry weight, relative growth rate and relative electrolyte leakage of roots and shoots were analyzed by RSA. The optimum combinations of Put concentration and soaking time for increasing shoot dry weight (SDW), root dry weight (RDW), shoot relative growth rate (SRGR) and decreasing shoot relative electrolyte leakage (SREL) were obtained. According to these optimum combinations, the optimum ranges for Put soaking concentration and soaking time were 0.45-0.60 mM and 11.5-17.9 h, respectively. It suggests that seed soaking in putrescine can improve chilling tolerance of maize seeds.
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Document Type: Research Article

Publication date: April 1, 2008

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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