毛竹、刚竹和水竹居间分生组织细胞分裂的研究

本文对毛竹、刚竹、水竹居间分生组织的细胞分裂进行了观察,结果表明:这三种竹类的居间生长与居间分生组织细胞的迅速分裂紧密相关,其细胞分裂的方式有:有丝分裂和无丝分裂两种。毛竹竹笋居间分生组织以有丝分裂为主兼无丝分裂;而刚竹和水竹则相反。无丝分裂主要是横缢方式,刚竹的无丝分裂特点是:只见核分裂,不进行或暂不进行胞质分裂,结果在这些分生细胞中产生二至多核现象,其细胞分裂的部位主要发生在表皮、下皮以内各维管束之间的基本组织薄壁细胞中,尤以近髓部的基本组织细胞分裂的频率高,具分裂相的细胞约占整个节间居间分生组织细胞的20%左右.本文还对居间分生组织细胞分裂与居间生长的关系进行了讨论。

STUDIES ON CELL DIVISION OF INTERCALARY MERISTEM AND INTERCALARY GROWTH OF THE PHYLLOSTACHYS PUBESCENS AND PHYLLOSTACHS BAMBUSOIDES,PHYLLOSTACHYS HETEROLADA OLIV

This paper reports cell division and intercalary growth of the intercalary meri-stem of the phyllostachys pubescens and the phyllcstachys bambusoides as well asthe phyllostahys heterolada Oliv.Based on the observation,the main conclu-sions are summarized as follows:The close relation with between the intercalarymeristem is found in the three specis.The ways of cell division have both mitosisand amitosis,Karyokinesis was found in the three species and cytokinesis was notobsorved In the result of karyokinesis two nucleus coennocye were produced in eachcell.The position of cell division take place mainly in the parenchymatous cellsof the ground tissue between vascular bundles below the epidermis.There arehigher frequencies of cell division in the ground tisses of the nearhy pith cavity.The division cell occupy about 20% of intercalary meristem cells the way andfrequencies of cell division exist between the intercalary meristem and the intercalarygrowth is discussed in this paper also.