槐种子发育中胚乳细胞半乳甘露聚糖积累的研究  

STUDIES ON GALACTOMANNAN ACCUMULATION IN THE ENDOSPERM OF SOPHORA JAPONICA DURING SEED DEVELOPMENT

作　　者：王英[1] 樊庭玉 白玉华[2] 杨瑞华[2] 

机构地区：[1]天津师范大学生物系,天津300074 [2]南开大学生命科学学院,天津300071

出　　处：《Acta Botanica Sinica》1996年第7期553-556,共4页Acta Botanica Sinica（植物学报：英文版）

摘　　要：槐 ( Sophora japonica L.)开花约 60 d至种子成熟 ,为胚乳半乳甘露聚糖积累期。用组织化学方法 ,对储藏于胚乳细胞壁上的半乳甘露聚糖的形成积累进行了观察 ,结果表明 ,半乳甘露聚糖最先在邻近胚的胚乳细胞的粗面内质网的囊泡腔内形成 ,并通过细胞质膜分泌至细胞壁周围。此后 ,半乳甘露聚糖的积累逐渐向种皮方向扩展 ,及至种子成熟时 ,除糊粉层外 ,所有胚乳细胞几乎全由多糖所填充。此外 。The deposition of galactomannan in the seed endosperm cells from Sophora japonica L. starts 55~60 d after anthesis and ends at the time of seed maturation. The formation and accumulation of galactomannan in the cell wall of endosperm examined using histochemical method. It was found that galactomannan was at first formed in the vesicle of rough endoplasmic reticulum of the endosperm cells near the embryo and then expelled outside the plasmalemma. Afterwards, galactomannan deposition in the endosperm cell expanded towards the seed coat. Consequently, all cells of the endosperm, except those of the aleurone layer, became almost completely filled with galactomannan. In addition to the description, the site of galactomannan formation and the fluctuation of galactomannan during seed maturation were also briefly discussed.

关 键 词：槐 种子 发育 胚乳 半乳甘露聚糖 

分 类 号：S792.260.1[农业科学—林木遗传育种]