Fig. S1 Leaf hyponasty and expression changes of EXPANSIN and XYLOGLUCAN ENDOTRANSGLYCOSYLASE/HYDROLASE genes.

Fig. S2 Differential expression of transcription factor family members.

Fig. S3 Submergence-induced responses in Col-0 and HUP mutants: expression of HUPs and petiole elongation of HUP mutants during submergence.

Table S1 Dataset 1: mRNA accumulation data, gene annotation and cluster assignments; summary of GO terms from fuzzy k-means clustering analyses

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