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The HK5 and HK6 cytokinin receptors mediate diverse developmental pathways in rice. | LitMetric

AI Article Synopsis

Article Abstract

The phytohormone cytokinin regulates diverse aspects of plant growth and development. Our understanding of the metabolism and perception of cytokinin has made great strides in recent years, mostly from studies of the model dicot Here, we employed a CRISPR/Cas9-based approach to disrupt a subset of cytokinin histidine kinase (HK) receptors in rice () in order to explore the role of cytokinin in a monocot species. In and single mutants, the root growth, leaf width, inflorescence architecture and/or floral development were affected. The double mutant showed more substantial defects, including severely reduced root and shoot growth, a smaller shoot apical meristem, and an enlarged root cap. Flowering was delayed in the mutant and the panicle was significantly reduced in size and infertile due to multiple defects in floral development. The mutant also exhibited a severely reduced cytokinin response, consistent with the developmental phenotypes arising from a defect in cytokinin signaling. These results indicate that HK5 and HK6 act as cytokinin receptors, with overlapping functions to regulate diverse aspects of rice growth and development.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7648598PMC
http://dx.doi.org/10.1242/dev.191734DOI Listing

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