坛紫菜壳孢子超微结构的研究

本文介绍了用电子显微镜观察坛紫菜壳孢子结构的结果。在电镜观察中，可见壳孢子外围具有一层很薄的质膜。细胞质内有一个轴生星状色素体，色素体中央有一个不被界膜的造粉核。细胞质内有少量脂质体。质体内布有许多质体小球。色素体的质体基质是单独的，彼此被居间层分开，色素体界膜和质体基质之间可见有相连接之处。类囊体表面布有藻胆体颗粒．细胞质内还可以见到线粒体、液泡、游离的红藻淀粉颗粒及核糖核蛋白体。细胞核有双层核膜，核膜外围也附有核糖核蛋白体，核膜上能见到核孔。细胞内的核仁，是一个致密而又结实的球体，细胞核与核仁之间无界膜分隔。

A STUDY ON ULTRASTRUCTURE IN CONCHOSPORES OF PORPHYRA HAIT ANENSIS

The Ultrastructure in conchospores of Porphyra haitanensis has been observed underelectronic microscope. Each conchospore is bounded by a thin layer of protoplasmic mem-brane. Within the cytoplasm there is a single stellate chloroplast. There are fusions betweenthe chloroplast envelope and plastid stroma. Thylakoids are separated from one anotherby intervening layers of stroma. Granunles of protein-pigment complexes (phycobilisom-es) are orderly arranged on the surface of the thylakoids. Pyrenoid is an electron dense body in the chloroplast stroma, sometimes, but notalways, it is traversed by derivatives of the thylakoid system. Grains of polysaccharide reserved material,--floridean starch, scatter freely in thecytoplasm. Plastoglobuli can only be found in the stroma of plastids. Only a few lipid bodies are present in the cytoplasm. The nucleus is egg-shaped and contains a single spherical nucleolus. There arenuclear pores distributed on the nuclear membrane. Other materials, such as vacuolesribosomes and mitochondria are also observed in the cytoplasm.