Rice mixed linkage glucan mutants (cslf6-1 and cslf6-2) versus wildtype
Δ18Oe was greater in the wildtype (24.52 ± 1.00 ‰) and cslf6-2 (23.69 ± 0.44 ‰) than cslf6-1(22.12 ± 0.30 ‰) (Table 2: Fig. 3a) and was higher at high light (24.78 ± 0.63 ‰) than at low light (22.10 ± 0.20 ‰), regardless of genotype (Table 2). Δ18OLW was significantly higher in cslf6-1 than wildtype and cslf6-2 mutants, but higher Δ18OLW in cslf6-1 was not due to higher Δ18Oe, which was lower in cslf6-1 than in wildtype and cslf6-2 (Table 2; Fig. 3b). There was a higher proportion of enriched than unenriched water (lower f sw) in cslf6-1 plants (0.36 ± 0.02) compared to wildtype (0.49 ± 0.02) and cslf6-2 (0.48 ± 0.02) mutant (Table 2). In all genotypes, fsw was higher under high light than low light (0.48 ± 0.02 and 0.40 ± 0.02, respectively; Table 2; Fig. 4a). E and g swere higher in wildtype (42 and 40 %, respectively) and cslf6-2(32 and 34 %, respectively) than in cslf6-1 under high light, but there was no difference between genotypes under low light (Table 2).E and g s significantly decreased under low light compared to high light in wildtype and cslf6-2 but notcslf6-1 (Table 2; Fig. 4b).