The Seed Dormancy Phenotype of SNL1 and SNL2 T-DNA Insertion Lines.
(A) Schematic diagrams of the SNL1 and SNL2 gene structures with the positions of the T-DNA insertions. Exons are shown as black boxes and introns and 5′ untranslated region as lines and dashed lines, respectively. The positions of the primers used for RT-PCR analysis in (B) are indicated next to the structures.
(B) RT-PCR analysis of the SNL1 and SNL2 transcripts in leaves of wild-type and T-DNA insertion mutants. Total RNA was extracted from 10-d-old fresh leaves and reverse transcribed to single-stranded cDNA. The primers for RT-PCR are indicated in (A) and listed in Supplemental Table 1 online. ACTIN8 was used as a loading control.
(C) Seed germination phenotypes of (the wild type), snl1, snl2-1, snl2-2, and the snl1 snl2-1 double mutant on water in the light after different periods of after-ripening. Percentages of seed germination are means (±se) based on at least eight individual plants for each genotype.
(D) Complementation of snl1. Seed germination of , snl1, and two homozygous transgenic lines (2-6 and 3-2) containing a P35S:SNL1 construct. Percentages of seed germination are means (±se) based on at least eight individual plants for each genotype.
(E) Seed survival of and the snl1, snl2-1, and snl1 snl2-1 mutants after dry storage for 90 and 180 d. The seeds were harvested under identical conditions and stored at 25°C in a controlled chamber with 16-h/8-h light/dark. This experiment was repeated three times with independent samples, and a representative result is shown. Percentages of seed germination are means (±se) based on at least eight individual plants for each genotype.