大帽藓(Encalypta ciliata Hedw.)原丝体发育特征的实验研究

在人工培养大帽藓(Encalypta ciliata Hedw.)孢子的基础上,对其孢子萌发、原丝体发育及配子体发生的全过程进行了观察、描绘和照相。实验结果表明:在大帽藓的原丝体系统中主要包括两种成分,即:粗短的丝状绿丝体和细长的柳枝状轴丝体。丝状绿丝体一般由4～6个短粗柱状细胞组成;而轴丝体则是由多数细长柱形细胞构成,其上间隔分布有2～5个细胞组成的棒状体,初生假根有或者无。同时,还对大帽藓原丝体发育的特征进行了分析和讨论,初步确定大帽藓孢子萌发属于新的孢子萌发类型——大帽藓型(Encalypta-type)。

Experimental Studies on the Characteristics of Protonema Development in Encalypta ciliata

Protonema growth and gametophyte development of Encalypta ciliata are observed based on the cultivation of spore germination. At the same time, the whole process is illustrated and taken photographs. The results show that the protonemal system of E. ciliata consists of two elements, the robust and short filamentous chloronema which is composed of 46 oblate cells and the thin and long caulonema like osier on which there are many clavae of 25 cells. The primary rhizoid exists or not. At the end, the characteristics of the protonema growth is analyzed and discussed. The sporeling type of E. ciliata is primarily named as Encalypta-type.