The Effect of Dehydration Treatment on the Germination of Saraca dives Seeds
To investigate the dehydration sensitivity and recalcitrance of Saraca dives seeds,the effects of dehydration treatment on seed germination were studied with mature seeds as materials.The seeds of S.dives were air-dried and dehydrated,and the 1 000 grain weight,water content,germination rate,Malondialdehyde(MDA),soluble sugar content,Catalase(CAT),Superoxide dismutase(SOD)activities of the seeds were measured.The results showed that the higher the degree of dehydration,the lower the germination rate of the seeds.The content of Malondialdehyde increased rapidly.Later,through the osmotic regulation of soluble sugar and the activation of SOD,CAT and other enzyme protection systems,the content gradually decreased but re-mained at a high level.In the later stage of dehydration,the membrane system was damaged and the enzyme protection system exceeded its limit,causing serious damage to the seeds.The S.dives were mainly distributed in tropical and subtropical regions,with high thousand seed weight,high water content,and obvious dehydra-tion sensitivity.These characteristics indicate that S.dives seeds were typically recalcitrant and should be taken seriously in seed storage and production.
万方数据
维普
