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The phospholipase A 2 inhibitor, aristolochic acid, disrupts cortical microtubule arrays and root growth in Arabidopsis
Author(s) -
Gardiner J.,
Andreeva Z.,
Barton D.,
Ritchie A.,
Overall R.,
Marc J.
Publication year - 2008
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1111/j.1438-8677.2008.00090.x
Subject(s) - microtubule , biology , aristolochic acid , phospholipase , microbiology and biotechnology , arabidopsis , phospholipase a2 , botany , biochemistry , biophysics , enzyme , genetics , gene , mutant
Abstract The role of phospholipase A 2 in Arabidopsis root growth and microtubule organisation was investigated using a specific inhibitor, aristolochic acid. At 0.5–1.5 μ m concentrations, this inhibitor reduced root elongation and caused radial swelling of the root tip. The normally transverse cortical microtubules in root tip cells became progressively more disorganised with increasing concentrations of the inhibitor. Microtubule disorganisation also occurred in leaf epidermal cells of Allium porrum . We propose that phospholipase A 2 is involved in microtubule organisation and anisotropic growth in a manner similar to that reported previously for phospholipase D, thus broadening the significance of phospholipid signalling in microtubule organisation in plants.