Cytokinin

Overexpression of type-A rice response regulators, OsRR3 and OsRR5, results in lower sensitivity to cytokinins

X. Cheng, Jiang, H., Zhang, J., Qian, Y., Zhu, S., and Cheng, B., Overexpression of type-A rice response regulators, OsRR3 and OsRR5, results in lower sensitivity to cytokinins, vol. 9, pp. 348-359, 2010.

Response regulators are part of a two-component regulatory system. The type-A Arabidopsis response regulators act as negative regulators. To understand the function of type-A response regulators in the model monocot plant, rice (Japonica cultivar-group: Zhonghua11), we overexpressed two type-A OsRR genes, OsRR3 and OsRR5 (pACT1:OsRR3 and pACT1:OsRR5). We hoped to gain insight into their molecular function in cytokinin-signaling pathways.

Genome-wide identification, classification, and analysis of two-component signal system genes in maize

Z. X. Chu, Ma, Q., Lin, Y. X., Tang, X. L., Zhou, Y. Q., Zhu, S. W., Fan, J., and Cheng, B. J., Genome-wide identification, classification, and analysis of two-component signal system genes in maize, vol. 10, pp. 3316-3330, 2011.

Cytokinins play many vital roles in plant development and physiology. In plants, cytokinin signals are sensed and transduced by the two-component signal system. This signaling cascade is typically composed of three proteins: a sensory histidine kinase, a histidine phosphotransfer protein, and a response regulator. Through a comprehensive genome-wide analysis of the maize (Zea mays) genome, 48 genes were identified, including 11 ZmHKs, 9 ZmHPs, and 28 ZmRRs (21 A-type ZmRRs and 7 B-type ZmRRs).

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