Genome-wide identification of the ARRs gene family in tobacco (Nicotiana tabacum)
Tóm tắt
The growth of axillary buds determines the shoot branching and morphology of plants, and its initiation and development are regulated by a series of hormonal signals, such as cytokinin. Arabidopsis response regulators (ARRs) can regulate the growth and development, disease resistance and stress resistance of plants by participating in cytokinin signaling. To explore the distribution and expression pattern of ARR members in tobacco. The identification, isoelectric points, molecular weights, protein subcellular localization prediction, multiple sequence alignment, phylogenetic analysis, protein motifs and structures, chromosome distributions of deduced ARR proteins were conducted. The gene expression profiling of various tissues in response to topping, low temperature and drought were analyzed by RNA-seq and qRT-PCR. 59 ARR genes from cultivated tobacco (Nicotiana tabacum) were identified, namely NtARRs, including 21 type A NtARRs and 38 type B NtARRs. The 59 NtARRs were expressed mainly in all organs except the fruits. Some representative NtARRs may participate in axillary bud initiation and development, as well as in stress resistance through cytokinin signal transduction. Understanding the roles of NtARRs in the molecular mechanisms responsible for axillary bud growth and stress tolerance could aid in targeted breeding in crops.
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