The nucleus of differentiated root plant cells: modifications induced by arbuscular mycorrhizal fungi

The nuclei of plant cells show marked differences in chromatin organisation, related to their DNA content, which ranges from the type with large strands of condensed chromatin (reticulate or chromonematic nuclei) to one with mostly decondensed chromatin (chromocentric or diffuse nuclei). A loosening...

Full description

Saved in:
Bibliographic Details
Published in:European journal of histochemistry 2001-01, Vol.45 (1), p.9-20
Main Authors: Lingua, G, Fusconi, A, Berta, G
Format: Article
Language:English
Subjects:
Cell Nucleus - microbiology
Cell Nucleus - physiology
Chromatin - physiology
Chromatin - ultrastructure
DNA, Plant - analysis
Fungi - pathogenicity
Fungi - physiology
Onions - genetics
Pisum sativum - genetics
Plant Physiological Phenomena
Plant Roots - cytology
Plant Roots - genetics
Plant Roots - microbiology
Solanum lycopersicum - genetics
Vegetables - genetics
Vegetables - metabolism
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The nuclei of plant cells show marked differences in chromatin organisation, related to their DNA content, which ranges from the type with large strands of condensed chromatin (reticulate or chromonematic nuclei) to one with mostly decondensed chromatin (chromocentric or diffuse nuclei). A loosening of the chromatin structure generally occurs in actively metabolising cells, such as differentiating and secretory cells, in relation to their high transcriptional activity. Endoreduplication may occur, especially in plants with a small genome, which increases the availability of nuclear templates, the synthesis of DNA, and probably regulates gene expression. Here we describe structural and quantitative changes of the chromatin and their relationship with transcription that occur in differentiated cells following an increase of their metabolism. The nuclei of root cortical cells of three plants with different 2C DNA content (Allium porrum, Pisum sativum and Lycopersicon esculentum) and their modifications induced by arbuscular mycorrhization, which strongly increase the metabolic activity of colonised cells, are taken as examples.
ISSN:1121-760X
2038-8306
DOI:10.4081/1609