Journal
PLANT BIOLOGY
Volume 10, Issue 6, Pages 725-731Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1438-8677.2008.00090.x
Keywords
Arabidopsis; aristolochic acid; microtubule arrays; phospholipase A(2); phospholipid signalling
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Funding
- Australian Research Council [DP0453114]
- Australian Research Council [DP0453114] Funding Source: Australian Research Council
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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 mu 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.
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