Identification and expression analysis of HK (histidine kinase) family receptors in peanut (Fabaceae)

JOHAN STIBEN RODRIGUEZ MELO; FERNANDO IBAÑEZ; MARIA LAURA TONELLI; ADRIANA FABRA

Córdoba

Congreso; The Ninth International Conference of the Peanut Research Community, Advances in Arachis through Genomics & Biotechnology. (AAGB); 2017

Cytokinins are plant hormones that play essential and crucial roles in various aspects of plant growth and development (Mok and Mok, 2001).In legumes, they are also required for symbiotic nodule development (Reid et al., 2016). The cytokinin signal is perceived by membrane-bound receptors (Wulfetange et al., 2011). Once the signal is perceived it is transduced by a multistep variant of the two-component signalling system (Heyl and Schmulling, 2003; Kakimoto, 2003; Bishopp et al., 2006). In Lotus japonicus, it has been reported that Mesorhizobium loti infection generates a presumed cell nonautonomous signalling event, which triggers cytokinin accumulation and a subsequent stimulation of cortical cell divisions (Held et al., 2014) (Figure 1). Apparently, he ifferent expression patterns for LHK genes are related with a homeostatic process required for root development, but the underlying mechanism is unknown (Held et al., 2014). In this sense, identification and expression analysis of peanut cytokinin receptors will provide valuable information about the evolutionary process and biological functions of cytokinin family receptors in peanut.