Phenotypic changes in M. sieversii under drought stress and snRNA identification. A, Phenotypic changes in M. sieversii under drought stress. The plants have been digitally extracted for comparison. Scale bar = 1 cm. Red lines mark the same position of the plant, highlighting phenotypic changes over time. B and C, Changes in leaf Proline and MDA contents in M. sieversii treated with 20% (w/v) PEG 6000. Data are presented as means ± sd from three biological replicates. Asterisks indicate significant differences in Pro and MDA contents between the treatments and controls based on Duncan’s multiple range test (*P < 0.05). D, Length distribution of new snRNAs in M. sieversii. E, Proportion of the first bases of new snRNAs in M. sieversii. FW, Fresh weight; CK, control check.