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Inhibition of Leaf Senescence by Autoregulated Production of Cytokinin
Abstract
Controlling expression of IPT , a gene encoding isopentenyl transferase (the enzyme that catalyzes the rate-limiting step in cytokinin biosynthesis), with a senescence-specific promoter results in the suppression of leaf senescence. Transgenic tobacco plants expressing this chimeric gene do not exhibit the developmental abnormalities usually associated with IPT expression because the system is autoregulatory. Because sufficient cytokinin is produced to retard senescence, the activity of the senescence-specific promoter is attenuated. Senescence-retarded leaves exhibit a prolonged, photosynthetically active life-span. This result demonstrates that endogenously produced cytokinin can regulate senescence and provides a system to specifically manipulate the senescence program.
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Citations
Cited by
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Khush, G. S. (2005) · Plant Molecular Biology · doi:10.1007/s11103-005-2159-5 · Cited by 1,424
Regulation of plant growth by cytokinin
Werner, T., Motyka, V., Strnad, M., & Schmülling, T. (2001) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.171304098 · Cited by 1,133
Wu, A., Allu, A. D., Garapati, P., Siddiqui, H., Dortay, H., Zanor, M.-I., Asensi-Fabado, M. A., Munné-Bosch, S., Antonio, C., Tohge, T., et al. (2012) · The Plant Cell · doi:10.1105/tpc.111.090894 · Cited by 601
Liang, C., Wang, Y., Zhu, Y., Tang, J., Hu, B., Liu, L., Ou, S., Wu, H., Sun, X., Chu, J., et al. (2014) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1321568111 · Cited by 522
Snowden, K. C., Simkin, A. J., Janssen, B. J., Templeton, K. R., Loucas, H. M., Simons, J. L., Karunairetnam, S., Gleave, A. P., Clark, D. G., & Klee, H. J. (2005) · The Plant Cell · doi:10.1105/tpc.104.027714 · Cited by 414
Metadata
- Authors
- Gan, S., & Amasino, R. M.
- Venue
- Science
- Published
- 1995-12-22
- Volume
- 270
- Issue
- 5244
- Pages
- 1986-1988
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2043409652
- Cited by
- 1,145
- References
- 0
- FWCI
- 5.68
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gan, S., & Amasino, R. M. (1995). Inhibition of Leaf Senescence by Autoregulated Production of Cytokinin. Science. https://doi.org/10.1126/science.270.5244.1986
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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.
