Abstract
Abstract:Specific inhibitors of the secretory pathway represent important tools for investigation of cell wall synthesis and tip growth in pollen tubes. Brefeldin A completely inhibits germination of Nicotiana tabacum pollen tubes at 2.2 μM. Ultrastructural investigation of pollen tube cytoplasm showed that brefeldin A caused the appearance of reticular structures and “brefeldin A compartments” containing unesterified pectins. Monensin caused inhibition of pollen tube germination at 80 nM. The drug induced swelling of the Golgi cisternae, many of which contained methyl‐esterified pectins. Cytochalasin D was effective at 1 μg/ml, the inhibition of germination being fully reversible. Application of the drug caused accumulation of secretory vesicles containing methyl‐esterified pectin around the dictyosomes. In contrast to brefeldin A and monensin, cytochalasin D caused a slowdown of cytoplasmic streaming. Monensin, but not the other drugs, caused a considerable decrease in pollen tube diameter. The characterization and quantification of the effects of the drugs on pollen tubes represents a necessary prerequisite for their application in physiological studies.
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Dates
Type | When |
---|---|
Created | 11 years, 6 months ago (Feb. 27, 2014, 5:06 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 27, 2023, 1:26 p.m.) |
Indexed | 1 year, 10 months ago (Oct. 28, 2023, 5:12 a.m.) |
Issued | 28 years, 11 months ago (Oct. 1, 1996) |
Published | 28 years, 11 months ago (Oct. 1, 1996) |
Published Online | 11 years, 6 months ago (Feb. 27, 2014) |
Published Print | 28 years, 11 months ago (Oct. 1, 1996) |
@article{Geitmann_1996, title={Inhibition of Intracellular Pectin Transport in Pollen Tubes by Monensin, Brefeldin A and Cytochalasin D*}, volume={109}, ISSN={0932-8629}, url={http://dx.doi.org/10.1111/j.1438-8677.1996.tb00586.x}, DOI={10.1111/j.1438-8677.1996.tb00586.x}, number={5}, journal={Botanica Acta}, publisher={Wiley}, author={Geitmann, Anja and Wojciechowicz, Kasia and Cresti, M.}, year={1996}, month=oct, pages={373–381} }