大豆子叶细胞中由液泡发育成蛋白体的不同方式

PATTERNS OF THE TRANSITION OF VACUOLES INTO PROTEIN BODIES IN DEVELOPING COTYLEDON CELLS OF SOYBEAN

At 18 days after flowering,it was observed that the big central vacuoles in the cotyledon cells began to subdivide or pinch-off into smaller ones,in which the storage proteins gradually accumulated,and the protein bodies thus formed.Three patterns of protein accumulation in the vacuoles were noticed,in one of them,the storage proteins deposited onto some regions of the inner surface of the tonoplast and new protein bodies formed by a budding-off process of the storage proteins enclosed by a portion of the tonoplast membrane.In other two patterns, storage proteins accumulated in vacuoles as proteinaceous lumps or as flocculent materials. The relation between the patterns of storage protein accumulation and soybean agglutinin (SBA) accumulation in vacuoles and the pathways of intracellular transport of storage pro- reins are discussed.