Preliminary studies of structure and function of the haptonema.

触角线虫是一种独特的细胞器，仅在线虫亚科中已知。这种细胞器的超微结构、功能作用和生物学意义尚不清楚。这项研究的目的是建立关于结构和功能两个方面的半身体的基本知识。选择了金色发酵菌来实现该项目。主要研究结果和结论如下：毛状金丝藻在捕食过程中起着重要的作用。对平纹夜蛾视频记录的食物捕获和吞噬过程的分析表明：猎物颗粒在触角线虫上附着并向底部移动；它们聚集在一个称为颗粒聚集中心的点上，转化为紧密堆积的聚集体；聚集体向上移动到触角线虫的顶端；触角线虫然后弯曲成S形状，导致聚集体输送到食物液泡中。根据这些观察结果，可以得出结论：金色假单胞菌的混合营养是由其表面粘附性、表面运动性、水泥质分泌和弯曲等多种特性综合而成的，这些特性在时间顺序上有明显的规律。触角由单个微管组成，微管排列成弧形或圆形，周围环绕着单丝内质网，其组成部分以不对称的方式排列，相对于其他细胞成分，如细胞核、食物液泡和鞭毛器，具有单一的绝对构型。半音系弯曲和缠绕的方向是根据ITS和*精确定义的。

The haptonema is a unique cellular organelle known only in the Prymnesiophyceae(=Haptophyceae). Ultrastructue, functional roles and biological significance of this organelle is not well understood. The aim of this study was to establish basic knowledge on the haptonema of both structural and functional aspects. Chrysochromulina was choosen to achieve the project. The following results and conclusions were obtained.Chrysochromulina hirta, the haptonema plays an important role in food capture. Analysis of video-recorded food capturing and phagotrophic processes in C.hirata revealed that : Prey particles adhere and move on the haptonema towards the base ; They are accumulated at a point called particle aggregating center and transformed into tightly packed aggregate ; The aggregate is moved up to the tip of the haptonema ; The haptonema then bends in S-shape, resulting in delivery of the aggregate to the food vacuole. Based on these observations, it is concluded mixotrophy of Chrysochromulina hirta is achieved by integration of various properties of the haptonema including surface adhesion, surface motility, secretion of cement material and bending, which are obviously regulated in chronological order. The haptonema is composed of singlet microtubules arranged in an arc or a circle surronded by haptonemal ER.There components are arranged in asymmetrical fashion and has a single absolute configuration in relation to other cellular components such as the nucleus, food vacuole and the flagellar apparatus. The direction of haptonemal bending and coiling is precisely defined in reltion to its and*