FINE STRUCTURE OF MYCOTA

Author:

Moore Royall T.1,McAlear James H.1

Affiliation:

1. From the Department of Plant Pathology, Cornell University, Ithaca, New York, and the Division of Laboratories and Research, New York State Department of Health, Albany, New York.

Abstract

Though the dictyosome of the Golgi apparatus appears to be generally distributed in plant and animal cells, it is here described for the first time in the fungi. The present report illustrates, in electron micrographs of thin sections, the characteristic structure of the Golgi dictyosome in a special cell type of a supporting pseudo-tissue (the inner ectal excipulum) of a highly evolved Ascomycete, Neobulgaria pura (Fr.) Petrak, a monotypic discomycete. This organelle may secrete the gelatinous matrix filling the cup formed by the inner ectal excipulum. All the other cells in this species appear more typical of fungal cells; i.e., they have no dictyosome and, unlike the cup-forming cells, they show characteristic continuities of the plasma membrane with the perinuclear cisternae. The dictyosome, in those cells in which it appears in this fungus, is formed by a series of vesiculations of the outer component of the nuclear envelope that align to form a stack of sacs. The sacs near the nucleus are flattened (by what appears to be an intermembrane cement) while those near the plasma membrane are more distended. These observations suggest three possibilities: first, fungi may be more closely related to other eukaryotic cells than previously suspected from electron microscopic studies; second, the outer nuclear membrane may have been the primitive precursor of the dictyosome; and third, the inverse relationship of the occurrence of the nuclear membrane plasma membrane continuities and the dictyosome suggests that the latter may have evolved as a means of removing from the cell the products of reactions occurring on a discontinuous membrane system.

Publisher

Rockefeller University Press

Subject

Cell Biology

Cited by 61 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3