“…For instance, 34 and 31 CDPKs have been identified in Arabidopsis and rice genomes, respectively (Hrabak et al, 2003; Ray et al, 2007). In addition, there are 20 CDPKs in wheat genome (Li et al, 2008), 23 in potato (Gromadka et al, 2018), 27 in cassava (Hu et al, 2016a), 29 in tomato (Hu et al, 2016b), 30 in poplar (Zuo et al, 2013), 40 in maize (Kong et al, 2013), and 41 in cotton (Liu et al, 2014). The biological functions of CDPKs, including pollen tube development (AtCPK2/AtCPK11/AtCPK17/AtCPK20/AtCPK24/AtCPK34) (Gutermuth et al, 2013; Zhao et al, 2013), response to environmental stresses (AtCPK1/AtCPK3/AtCPK4/AtCPK5/AtCPK6/AtCPK8/AtCPK10/AtCPK11/AtCPK13/AtCPK21) (Choi et al, 2005; Mori et al, 2006; Zhu et al, 2007; Boudsocq et al, 2010; Franz et al, 2011; Zhou et al, 2015), and plant growth regulation (AtCPK12/AtCPK28) (Zhao et al, 2011; Matschi et al, 2013), have been well characterized in Arabidopsis .…”