Cytokinin is a classical plant hormone, which plays an important role in regulating cell division, apical dominance, leaf senescence and other development processes, as well as plant response to abiotic stresses such as salt and drought. TaRRAs are primary cytokinin response genes and important components of cytokinin signal transduction pathway.
Recently, a research paper entitled “Genome-wide identification and expression analysis of the TaRRA gene family in wheat (Triticum aestivum L.)” by the wheat research center of the Institute of Cereal and Oil Crops of HAAFS was published online in Frontiers in Plant Science. The study identified 20 TaRRA genes in the whole genome of wheat through bioinformatics analysis, and divided them into 8 homologous genes, named TaRRA1-A/B/D to TaRRA8-A/D respectively according to homology analysis and chromosome location.
In this study, the gene structure, conserved motifs, collinearity relationship of chromosomes, and cis-acting regulatory elements of the TaRRAs were analyzed. Quantitative real-time polymerase chain reaction (qRT-PCR) results showed that the expression levels of most of the TaRRAs increased rapidly on exogenous cytokinin application. Moreover, the TaRRA family members displayed different expression profiles under the stress treatments of drought,
salt, cold, and heat. This study provides valuable insights into the RRA gene family in wheat and promotes the potential application of these genes in wheat genetic improvement.
Researcher SUN Lijing and LV Liangjie are the co-first authors. Researcher LI Hui and ZHANG Yingjun are the corresponding authors.
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