Priming Effects on Germination of Aged Tobacco Seeds

Tobacco (Nicotiana tabacum L. cv KF109) seeds were artificially aged in a controlled environment of 45 and 80% relative humidity condition for different duration up to 14 days before priming in polyethylene glycol 6000 solution of equivalent osmotic potential of -0.8 MPa for 8 days at . The seeds aged only and primed after aging were germinated at 15 and to observe the priming effects on the germination of aged seeds at different temperature. The germination percentage of the aged seeds was rapidly dropped starting from 8 days of aging and mean germination time (T) was greatly increased, particularly in germination at 15. The germination capacity was greatly restored in the primed seeds after aging, particularly in the seeds of longer aging and germinating at 15.>.