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The Meridional Arrangement of Cortical Microtubules Defines the Site of Tip Growth in the Coenocytic Green Alga, Chamaedoris orientalis

The Meridional Arrangement of Cortical Microtubules Defines the Site of Tip Growth in the... Abstract The relationships between cell growth and the organization of cortical microtubules (MTs) in the coenocytic green alga Chamaedoris orientalis were studied by indirect immunofluorescence microscopical observation of cells treated with amiprophos-methyl (APM). This algal cell is cylindrical in shape and has cortical MTs arranged longitudinally at the lateral side of the cell but meridionally at the apices where growth occurs. When cells were treated with APM, growth stopped within 2 h, and the number of cortical MTs decreased with the duration of APM treatment. Cells treated for 20 h with APM restarted growth at the apices 10 h after the removal of APM, whereas cells treated for 48 h and more with APM produced new growing tips on the lateral side of the cell 7 d after the removal of APM. After the removal of APM, two distinctive patterns were observed in the reorganization of cortical microtubules, depending on the duration of APM treatment: 1) cortical MTs were reassembled longitudinally to the cell axis to recover the original arrangement of cortical MTs, after cells were treated for 40 h with APM; 2) cortical MTs initially appeared with random orientation, and then the bundles of cortical MTs, remarkably http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

The Meridional Arrangement of Cortical Microtubules Defines the Site of Tip Growth in the Coenocytic Green Alga, Chamaedoris orientalis

Botanica Marina , Volume 36 (1) – Jan 1, 1993

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References (25)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1993.36.1.53
Publisher site
See Article on Publisher Site

Abstract

Abstract The relationships between cell growth and the organization of cortical microtubules (MTs) in the coenocytic green alga Chamaedoris orientalis were studied by indirect immunofluorescence microscopical observation of cells treated with amiprophos-methyl (APM). This algal cell is cylindrical in shape and has cortical MTs arranged longitudinally at the lateral side of the cell but meridionally at the apices where growth occurs. When cells were treated with APM, growth stopped within 2 h, and the number of cortical MTs decreased with the duration of APM treatment. Cells treated for 20 h with APM restarted growth at the apices 10 h after the removal of APM, whereas cells treated for 48 h and more with APM produced new growing tips on the lateral side of the cell 7 d after the removal of APM. After the removal of APM, two distinctive patterns were observed in the reorganization of cortical microtubules, depending on the duration of APM treatment: 1) cortical MTs were reassembled longitudinally to the cell axis to recover the original arrangement of cortical MTs, after cells were treated for 40 h with APM; 2) cortical MTs initially appeared with random orientation, and then the bundles of cortical MTs, remarkably

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1993

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