Fig. 3

a Heatmap of log2FC values of the DEGs enriched in porphyrin and chlorophyll metabolism pathway (Ko00860). b Heatmap and pathway map of the DEGs enriched in photosynthesis – antenna proteins (Ko00196). c Heatmap and pathway map of the DEGs enriched in photosynthesis (Ko00195). The second panels in “b” and “c” show the respective KEGG pathway maps with the red boxes representing the enriched DEGs. The maps were developed in the KEGG pathway database [54] using the KEGG pathway mapper [55] by searching Ko IDs of the DEGs on respective pathways. Where CK = 0.8% salt stressed, B1, B2, B3, and B4 = 0.8% salt-stressed seedlings exogenously sprayed with 100 ml of 50 μM, 100 μM, 200 μM, and 500 μM melatonin solution, respectively