ISSN:
1615-6102
Keywords:
Cell cycle
;
Dictyosome ultrastructure
;
Quantitative analysis
;
Root meristems
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Dictyosome ultrastructure changes during the cell cycle in onion root meristematic cells. Changes were mainly related to cisternae and intercisternal spaces morphology. Taking each dictyosome to be composed of three different regions (CIS, medial, and TRANS), several quantitative changes were detected in some of the compartments. Many of the planimetric parameters evaluated showed higher values in medical cisternae, while CIS and TRANS remained nearly constant. We have also found an increased activity of dictyosomes, as indicated by increase in the volume fraction of vesicular attached structures. This reaches maximum values at ana-telophase in coincidence with the onset and progression of cytokinesis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01354293
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