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Inhibition of Pollen Tube Elongation by Microinjected Anti-Rop1Ps Antibodies Suggests a Crucial Role for Rho-Type GTPases in the Control of Tip Growth.
Open accessAbstract
Microinjection of anti-Rop1Ps antibodies was used to assess the function of a tip-localized Rho-type GTPase, Rop, in controlling pollen tube growth. Injected antibodies induced sustained growth arrest within 1 to 2 min after injection but did not affect cytoplasmic streaming. Coinjection with Rop rescued antibody-induced growth inhibition, indicating that injected antibodies specifically block the activity of Rop GTPases. Antibody-induced inhibition was significantly enhanced in the presence of a lower threshold of extracellular [Ca2+] or a subinhibitory dosage of caffeine. In contrast, injection of the C3 toxin, which inactivates a different Rho-type GTPase, arrested tube elongation 10 to 20 min after injection. C3-induced growth arrest was accompanied by the cessation of cytoplasmic streaming. These data suggest that Rho-type GTPases play a pivotal role in the control of pollen tube elongation. We propose that Rop may regulate a Ca2+-dependent pathway involved in vesicle docking/fusion, whereas a C3-sensitive Rho GTPase may mediate cytoplasmic streaming.
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Cited by
Polarized Cell Growth in Higher Plants
Hepler, P. K., Vidali, L., & Cheung, A. Y. (2001) · Annual Review of Cell and Developmental Biology · doi:10.1146/annurev.cellbio.17.1.159 · Cited by 745
Arabidopsis thaliana Rop GTPases are localized to tips of root hairs and control polar growth
Molendijk, A. J., Bischoff, F., Rajendrakumar, C. S. V., Friml, J., Braun, M., Gilroy, S., & Palme, K. (2001) · The EMBO Journal · doi:10.1093/emboj/20.11.2779 · Cited by 439
Trotochaud, A. E., Hao, T., Wu, G., Yang, Z., & Clark, S. E. (1999) · The Plant Cell · doi:10.1105/tpc.11.3.393 · Cited by 417
Self-citationMuhlemann, J. K., Younts, T. L. B., & Muday, G. K. (2018) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1811492115 · Cited by 367
Microtubules regulate tip growth and orientation in root hairs ofArabidopsis thaliana
Bibikova, T. N., Blancaflor, E. B., & Gilroy, S. (1999) · The Plant Journal · doi:10.1046/j.1365-313x.1999.00415.x · Cited by 296
Metadata
- Authors
- Lin, Y., & Yang, Z.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 1997-09-01
- Volume
- 9
- Issue
- 9
- Pages
- 1647-1659
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2146967896
- Cited by
- 168
- References
- 0
- FWCI
- 5.85
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Inhibition of Pollen Tube Elongation by Microinjected Anti-Rop1Ps Antibodies Suggests a Crucial Role for Rho-Type GTPases in the Control of Tip Growth. https://app.cochat.ai/papers/10.1105/tpc.9.9.1647
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- Lin, Y., & Yang, Z. (1997). Inhibition of Pollen Tube Elongation by Microinjected Anti-Rop1Ps Antibodies Suggests a Crucial Role for Rho-Type GTPases in the Control of Tip Growth. The Plant Cell. https://doi.org/10.1105/tpc.9.9.1647
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
