甜柿单宁的分布及积累特征分析

Distribution and Accumulation of Tannins in Persimmon

为了解甜柿果肉中单宁积累的显微特征,采用组织化学方法和透射电子显微技术对甜柿不同组织中单宁的分布进行了观察分析。结果表明,甜柿果实单宁积累有如下特征:贮藏组织和维管组织中只有少量细胞积累单宁,大部分细胞不含单宁;单宁积累场所有两部分,一是细胞内空间,为液泡,一是细胞外空间,即细胞间隙;贮藏组织中才有细胞间隙,只有贮藏组织细胞间隙才积累单宁;积累单宁细胞的内部空间几乎被单宁充满,细胞质极少;通常2个或多个单宁细胞聚集成簇。

To understand the microscopic pattern of tannin accumulation in the non-astringent fruits,tannin-accumulating cells and their distribution were characterized by histochemistry and transmission electron microscopy.In both storage tissue and viscular tissue,there were only few cells that accumulated tannins,while most cells did not accumulate tannins.There were two compartments where tannins accumulated.One was the vacuole inside the cell,and the other was the intercellular space.Intercelluar space was characteristic of storage tissue,and so intercellular accumulation of tannins occurred only in storage tissue.Tannin cells were filled with tannins,and cytoplasm was rather little.It was common that 2 or more tannin cells happened together.