Effect of storage temperature and moisture content on seed vitality of Moso bamboo (Phyllostachys edulis).
In this study,the germination abilities were compared among air drying Moso bamboo seeds which were stored in five different storage temperature for two and half years.The effects of moisture content on seed vitalities were analyzed after the Moso bamboo seeds stored for two years in different storge temperature.Results showed that low temperature and moderate drying were significant factors and effective methods for keeping seed vitality of Moso bamboo seeds,only low temperature was not helpful to seed storage.The optimum moisture content for seeds storage depended on storge temperature,the lower the temperature was,the wider the optimum moisture content range was and the optimum moisture content for keeping higher seed vitality was higher.The optimum seeds moisture content at 4℃ and 25℃ were 7.45% and 6.46%,respectively.The MDA content of Moso bamboo seeds stored at 4℃ was obviously lower and activities of three kinds of antioxidant enzymes POD,SOD and CAT were remarkably higher than that of stored at 25℃.The MDA content decreased obviously and the activities of POD,SOD and CAT increased remarkably in the moderately dried seeds of Moso bamboo.The main reasons to keep seed vitality were increasing antioxidant ability and suppressing lipid peroxidation of Moso bamboo seeds with moderately drying and low temperature during storage.