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Characterization of the cytokinin-responsive transcriptome in rice. | LitMetric

AI Article Synopsis

  • - The study uses RNA-Seq to investigate how cytokinin affects gene expression in rice, a monocot plant, revealing over 4,600 genes in roots and around 2,400 in shoots that respond to this hormone.
  • - Similarities with the dicot plant Arabidopsis thaliana include the up-regulation of genes that dampen cytokinin's effects, indicating shared regulatory mechanisms between these plant types.
  • - The findings highlight a significant role for cytokinin in managing both plant development and responses to biotic stress, particularly through the regulation of transcription factors and genes reacting to pathogen infections.

Article Abstract

Background: Cytokinin activates transcriptional cascades important for development and the responses to biotic and abiotic stresses. Most of what is known regarding cytokinin-regulated gene expression comes from studies of the dicotyledonous plant Arabidopsis thaliana. To expand the understanding of the cytokinin-regulated transcriptome, we employed RNA-Seq to analyze gene expression in response to cytokinin in roots and shoots of the monocotyledonous plant rice.

Results: We identified over 4,600 and approximately 2,400 genes differentially expressed in response to cytokinin in roots and shoots respectively. There were some similarities in the sets of cytokinin-regulated genes identified in rice and Arabidopsis, including an up-regulation of genes that act to reduce cytokinin function. Consistent with this, we found that the preferred DNA-binding motif of a rice type-B response regulator is similar to those from Arabidopsis. Analysis of the genes regulated by cytokinin in rice revealed a large number of transcription factors, receptor-like kinases, and genes involved in protein degradation, as well as genes involved in development and the response to biotic stress. Consistent with the over-representation of genes involved in biotic stress, there is a substantial overlap in the genes regulated by cytokinin and those differentially expressed in response to pathogen infection, suggesting that cytokinin plays an integral role in the transcriptional response to pathogens in rice, including the induction of a large number of WRKY transcription factors.

Conclusions: These results begin to unravel the complex gene regulation after cytokinin perception in a crop of agricultural importance and provide insight into the processes and responses modulated by cytokinin in monocots.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5146874PMC
http://dx.doi.org/10.1186/s12870-016-0932-zDOI Listing

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