Figure 4.

The rapid germination on salt of etr1;etr2;ein4 triple mutants is differentially reversed by etr1 point mutant transgenes. Germination time courses of etr1-6;etr2-3;ein4-4 triple mutants transformed with genomic DNA encoding a mutant etr1 transgene containing the indicated point mutation were determined in the absence (A) or presence (B–D) of 150 mm NaCl. For comparison, data from the wild type, etr1-6;etr2-3;ein4-4 triple mutants, and triple mutants transformed with a wild-type genomic ETR1 (gETR1) transgene are included in each section. The percentage of seeds that germinated was determined every 12 h. All experiments were performed in triplicate. The average percentage of seed germination ± sd at each time is plotted for each seed line.