Ultrastructure and ontogeny of a new type of eyespot in dinoflagellates
Ultrastructure and ontogeny of a new type of eyespot in dinoflagellates
复制标题
甲藻新型眼点的超微结构和个体发育
DOI：
10.1007/bf01403952
复制
发表时间：
1994
期刊：
影响因子：
2.9
通讯作者：
R. Pienaar
中科院分区：
文献类型：
--
作者：
T. Horiguchi;R. Pienaar
摘要描述了甲藻中新型眼点的超微结构和个体发育。人们发现海洋潮汐池 Gymnodinium natalense 拥有高度组织化的眼点，其结构在甲藻中是独一无二的。眼点腹面观呈矩形，顶面观呈C形，位于沟后方。眼斑独立于叶绿体，由几层（通常是六层）半圆柱形壁组成，这些壁同心排列，它们之间的间距很窄。每个半圆柱形墙体均由单个单元膜包围，并由许多规则排列的矩形结晶砖组成。这些结晶砖是在叶绿体内陷中形成的小囊泡中产生的。然后，含有新形成的结晶砖的囊泡被运送到脑沟区域以组装眼点。晶砖在被称为“眼斑形成囊泡”（EFV）的囊泡内排列成整齐的一排，该囊泡位于沟附近。半圆柱形墙建在 EFV 内。根据眼斑的结构，即。眼点由同心多层壁组成，被认为充当四分之一波堆叠天线。
SummaryUltrastructure and ontogeny of a new type of eyespot in dinoflagellates is described. A marine tidal poolGymnodinium natalense is found to possess a highly organized eyespot whose structure is unique among dinoflagellates. The eyespot is rectangular in ventral view, C-shaped in apical view, and is located posterior to the sulcus. The eyespot is independent of the chloroplast and consists of several (typically six) layers of hemi-cylindrical walls which are concentrically arranged with narrow spacing between them. Each hemicylindrical wall is enclosed by a single unit membrane and is composed of many regularly arranged rectangular crystalline bricks. These crystalline bricks are produced in small vesicles which are formed in the invaginations of the chloroplast. The vesicles containing newly formed crystalline bricks are then transported to the sulcal area to assemble the eyespot. The crystalline bricks are arranged in a neat row within the vesicle termed “eyespot forming vesicle” (EFV), which is located near the sulcus. The hemi-cylindrical wall is constructed within the EFV. Based on the structure of the eyespot, viz. consisting of concentric multi-layered walls, the eyespot is thought to act as a quarter-wave stack antenna.
在高pH值中使用柠檬酸铅作为电子显微镜中的电子斑点。
影响因子：
7.8
作者：
REYNOLDS, E S
通讯作者：
REYNOLDS, E S