Identification of Shaker K+ channel family members in sweetpotato and functional exploration of IbAKT1

Identification and expression analysis of Shaker K+ channel genes in millet (Setaria italica) under abiotic stresses

“…As shown in Figure 8 and Figure 9, other remaining gene displayed its own regulation pattern under different treatments, which was consistent with findings from previous reports in Arabidopsis (Pilot et al, 2003a) and sweetpotato (Jin et al, 2021). In Arabidopsis, AKT1 is involved in a major pathway for K + uptake at the root epidermis (Geiger et al, 2009).…”

“…Our qRT-PCR analysis revealed that this outward K + channel was upregulated by all stress and un-response to ABA in the present study. Previous reports suggested that SKOR was alter regulated by different abiotic stress and decreased by ABA treatment (Pilot et al, 2003a; Jin et al, 2021). The special pattern of SiSKOR compared to SKORs in other species suggest the redistribution of K + among tissues might contribute to the stress tolerant of millet.…”

“…Interestingly, according to the RNA-seq data, the genes in group IV could not detect in all tissues. One explanation of this result is that the expression of some K + channels are only induced under stress (Zhang et al, 2018; Jin et al, 2021), which need further research.…”

“…Shaker K + channels are highly conserved voltage-dependent ion channels in plants, which play important role in the transport and distribution of K + in plant cells. Investigations focused on this family of genes have been performed in many species (Dreyer and Uozumi, 2011; Amrutha et al, 2007; Bauer et al, 2000; Jin et al, 2021). However, these is little report focused on the Shaker K + channels in foxtail millet ( Setaria italica ), a high drought resistance cereal crops wildly cultivated in Asia.…”

“…The K + channels are divided into three families according to their α-subunits configuration differences, including Shaker, TPK and Kir-like K + channel families (Lebaudy et al, 2007). Among them, the Shaker K + channel family is the most extensively studied and has been identified in many plants, including Arabidopsis (Dreyer and Uozumi, 2011), rice (Amrutha et al, 2007; Hwang et al, 2013), maize (Bauer et al, 2000), poplar (Zhang et al, 2010), and sweetpotato (Jin et al, 2021). Shaker K + channel have been shown to be involved in K + uptake from soil and stomata movement.…”