To further investigate whether GALS

To further investigate whether GALS1 affects other cell wall components in response to salt stress, we measured the contents of pectin and hemicellulose in salt-treated roots of gals1-1, OE-GALS1#1 and Col-0. In the absence or presence of NaCl, the contents of pectin and hemicellulose in gals1 mutants and GALS1 overexpressors were similar to those in wild type (Figure 4D and 4E). Monosaccharide composition analysis showed that only the D-Gal contents in the root cell wall were affected in gals1 mutant and GALS1 overexpressor under NaCl treatment (Table S1). Together, these results indicate that GALS1 negatively affects crystalline cellulose synthesis only under the salt stress.