Involvement of microtubules in rhizoid differentiation of Spirogyra species.

Abstract:

:Some species of Spirogyra form rosette-shaped or rod-shaped rhizoids in the terminal cell of the filaments. In the present study, we analyzed an involvement of microtubules (MTs) in rhizoid differentiation. Before rhizoid differentiation, cortical MTs were arranged transversely to the long axis of cylindrical cells, reflecting the diffuse growth. At the beginning of rhizoid differentiation, MTs were absent from the extreme tip of the terminal cell. In the other area of the cell, however, MTs were arranged transversely to the long axis of the cell. In the fully differentiated rosette-shaped rhizoid, MTs were randomly organized. However, at a younger stage of rosette-shaped rhizoids, MTs were sometimes arranged almost transversely in the lobes of the rosette. In the rod-shaped rhizoid, MTs were arranged almost transversely. MT-destabilizing drugs (oryzalin and propyzamide) induced swelling of rhizoids, and neither rosette-shaped nor rod-shaped rhizoids were formed. The role of MTs in rhizoid differentiation was discussed.

journal_name

Protoplasma

journal_title

Protoplasma

authors

Yoshida K,Inoue N,Sonobe S,Shimmen T

doi

10.1007/s00709-002-0078-8

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

227-35

issue

3-4

eissn

0033-183X

issn

1615-6102

journal_volume

221

pub_type

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