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Involvement of actin filaments in rhizoid morphogenesis of Spirogyra
Author(s) -
Yoshida Katsuhisa,
Shimmen Teruo
Publication year - 2009
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.2008.01172.x
Subject(s) - rhizoid , spirogyra , morphogenesis , actin , turgor pressure , elongation , biophysics , microbiology and biotechnology , tip growth , cytochalasin d , cytoplasmic streaming , chemistry , cytoskeleton , chara , botany , biology , algae , biochemistry , materials science , cell , pollen , ultimate tensile strength , pollination , metallurgy , gene , pollen tube
The role of actin filaments in rhizoid morphogenesis was studied in Spirogyra . When the algal filaments were severed, new terminal cells started tip growth and finally formed rhizoids. Actin inhibitors, latrunculin B and cytochalasin D, reversibly inhibited the process. A mesh‐like structure of actin filaments (AFs) was formed at the tip region. Gd 3+ inhibited tip growth and decreased AFs in the tip region. Either a decrease in turgor pressure or lowering of the external Ca 2+ concentration also induced similar results. It was suggested that the mesh‐like AF structure is indispensable for the elongation of rhizoids. A possible organization mechanism of the mesh‐like AF structure was discussed.