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Molecular Characterization of Cytokinin-Responsive Histidine Kinases in Maize. Differential Ligand Preferences and Response to cis-Zeatin
Open accessAbstract
Genes for cytokinin-responsive His-protein kinases (ZmHK1, ZmHK2, and ZmHK3a) were isolated from maize (Zea mays). Heterologous expression of each of the ZmHKs in Escherichia coli having the ΔrcsC and cps∷lacZ genetic background conferred cytokinin-inducibility of lacZ expression on the bacteria. In the recombinant E. coli system, ZmHK1 and ZmHK3a were more sensitive to free-base cytokinins than to the corresponding nucleosides; isopentenyladenine was most effective for ZmHK1, while ZmHK2 tended to be most sensitive to trans-zeatin and the riboside. In contrast to a known cytokinin receptor of Arabidopsis (AHK4/CRE1/WOL), all ZmHKs responded to cis-zeatin (cZ), which generally is believed to be inactive or only weakly active. In cultured maize cells, expression of ZmRR1, a cytokinin-inducible response regulator, was induced by cZ as well as by trans-zeatin. These results strongly suggest that maize cytokinin receptors differ in ligand preference, and that cZ is an active cytokinin at least in maize.
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Citations
Cited by
Evolution of cytokinin biosynthesis and degradation
Frebort, I., Kowalska, M., Hluska, T., Frebortova, J., & Galuszka, P. (2011) · Journal of Experimental Botany · doi:10.1093/jxb/err004 · Cited by 422
Yonekura-Sakakibara, K., Tohge, T., Matsuda, F., Nakabayashi, R., Takayama, H., Niida, R., Watanabe-Takahashi, A., Inoue, E., & Saito, K. (2008) · The Plant Cell · doi:10.1105/tpc.108.058040 · Cited by 398
Self-citationGajdošová, S., Spíchal, L., Kamínek, M., Hoyerová, K., Novák, O., Dobrev, P. I., Galuszka, P., Klíma, P., Gaudinová, A., Žižková, E., et al. (2011) · Journal of Experimental Botany · doi:10.1093/jxb/erq457 · Cited by 310
Cytokinin signaling regulates cambial development in poplar
Nieminen, K., Immanen, J., Laxell, M., Kauppinen, L., Tarkowski, P., Dolezal, K., Tähtiharju, S., Elo, A., Decourteix, M., Ljung, K., et al. (2008) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0805617106 · Cited by 309
Yonekura-Sakakibara, K., Tohge, T., Niida, R., & Saito, K. (2007) · Journal of Biological Chemistry · doi:10.1074/jbc.m611498200 · Cited by 271
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Metadata
- Authors
- Yonekura-Sakakibara, K., Kojima, M., Yamaya, T., & Sakakibara, H.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-04-01
- Volume
- 134
- Issue
- 4
- Pages
- 1654-1661
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W2159338397
- Cited by
- 201
- References
- 0
- FWCI
- 16.12
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Yonekura-Sakakibara, K., Kojima, M., Yamaya, T., & Sakakibara, H. (2004). Molecular Characterization of Cytokinin-Responsive Histidine Kinases in Maize. Differential Ligand Preferences and Response to cis-Zeatin. Plant Physiology. https://doi.org/10.1104/pp.103.037176
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