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Increased longevity (LD50) in transgenic DS10:A9 seeds. A, Resistance to CDT of the DS10:A9 seeds used for LD50 determinations. CDT conditions and symbols are as in Figure 5. B, Seeds from the lines analyzed in A were subjected to CDT for the times listed at top right (0.5–3 d at 50°C). Germination percentage was scored 16 d after transferring the treated seeds to normal germination conditions. These results were used for the LD50 determinations mentioned in “Results.”
