Physiological Effect Of Ultra Dried Seed During Storage On Ceratoides Arborescens

Ceratoides arborescens seed was chosen as trial materials. The silica gel was used to dry the seed, and the seed treatments in different moisture content(MC) were got. Then the seed was storied in aluminum foil bags at room temperature and 4℃respectively for 1 year. Germination situation, relatively conductivity, the anti-oxidation enzyme system, MDA content and soluble sugar consistency were tested during storage period. On the basis of analyzing ultra dried seed physiobiochemical changes, the relationship between the most suitable temperature for seed preservation and optimum MC was discussed. The results were as follows:The seed enzyme activity reduced during storage. The ultra dried treatments declined less than un-ultra dried one. The MDA content, relatively conductivity and soluble sugar consistency of seeds went up during the storage, and ultra dried seeds increased less than the un-ultra dried ones. Therefore, the ultra drying storage method is suitable for C. arborescens seeds. With this method, the seed storage endurance could be increased, the seed life span could be significantly extended, and the seed vigor could be maintained in better status.Temperature had little influence on optimum MC of C. arborescens. The optimums MC were 2.8%-5.5% and 2.8%-4.5% when seeds stored at 4℃and room temperature respectively.Analyzing by Principal Component Analysis, all of the physiology and biochemical indexes could be classified into two categories. The first category included indexes of the activity SOD, POD, CAT, Acid phosphates and TTC, which were the main factors, induced the vigor changes therefore the reliable indexes in examining the seed vigor. The second category included indexes of soluble sugar consistency, relatively conductivity and MDA content.