种子贮藏蛋白的运输、积累和基因表达调控

种子中贮藏蛋白的运输和积累途径主要有：(1)蛋白质合成后经内膜系统转移到蛋白质贮藏液泡(PSV)中积累；(2)合成的蛋白质直接在粗糙内质网的膜囊中积累形成蛋白质体；(3)贮藏蛋白不经高尔基体的加工由粗糙内质网上合成后直接运输到PSV中积累。贮藏蛋白基因的表达受该基因的顺式作用元件和反式作用因子的共同调控，此外染色体的结构也影响贮藏蛋白基因的表达。

Transportation and Accumulation of Storage Protein and Regulation of Genes Expression in Seeds

There are three transportation and accumulation routes of storage protein in seed: (1) storageprotein is transported to protein storage vacuole (PSV) via endomembrane system and accumulated in PSV; (2)storage protein is accumulated in lumen of rough endoplasmic reticulum and become protein body; (3) storageprotein is transported to PSV and accumulated in them, but dictyosome is not involved in this process. Regulation ofseed storage protein genes expression is controlled under the interaction of cis-acting elements and trans-actingfactors of these genes. Gene organization and chromatin structure are also been shown to be involved in seed-specific expression of the storage protein gene.