Cross-talk and specificity of signal perception and transduction in response to salt and drought stress in <i>B</i>. <i>napus</i>.

<p>The most differentially expressed signaling-related proteins were integrated and marked in red (up-regulated) or green (down-regulated). The blue region in the middle represented the cross-talk pathway shared by both the salt and drought responses. The calcium-bind EF-hand family protein, which acted as a Ca²⁺ sensor sensing Ca²⁺ ion concentration in the cytoplasm, and ZKT protein, which may act as a molecular adaptor that was regulated by phosphorylation and modulated the ROS pathway, were overlapping signaling proteins in the salt and drought responses. Differential signal receptors, small G protein, 14-3-3 pathway members, kinases and phosphatases were identified in the salt and drought responses, indicating differences in signal perception and transduction occurred in the early stage of the salt and drought responses. Abbreviations: GPI, glycosylphosphatidylinositol (GPI)-anchored protein; PLC2, phospholipase C; RABF2a, Ras-related protein RABF2a; RABB1c, Ras-related protein RABB1c; GRF8, 14-3-3-like protein GF14 kappa; GRF2, 14-3-3-like protein GF14 omega; CDPK21, calcium-dependent protein kinase 21; TOR, serine/threonine-protein kinase TOR; CTR, serine/threonine-protein kinase CTR, STN7, serine/threonine-protein kinase STN7; BSL1, serine/threonine-protein phosphatase BSL1; ZKT, protein containing PDZ, K-box and a TPR region.