Fig. 9

Heatmaps of the enriched calcium ion (Ca²⁺) homeostasis in the W- and MC-primed cotton seeds under salt stress. A The differentially expressed proteins (DEPs) and B differentially regulated phosphoproteins (DRPPs) related to Ca²⁺ channels/transporters and calmodulin-like protein (CML) in the WS_vs_WCK, MCS_vs_WCK, MCS_vs_WS treatments. The same name refers to the different phosphorylation forms of the protein. C Ca²⁺ content in the hypocotyl regions of the W- and MC-primed cotton seeds after 24 h of salt stress. WCK: water-primed seeds germinated in the sand without NaCl; WS: water-primed seeds germinated in the sand containing NaCl; MCS: MC-primed seeds germinated in the sand containing NaCl. * represents significant differences at P < 0.05 (t-test)