Primed and unprimed seeds were germinated in plastic boxes
(12 × 12 × 6 cm) with two layer filter papers moistened with 10 ml
appropriate solutions, 6 levels of osmotic potentials including 0 (distilled
water), −1.0, −2.0, −3.0, −4.0 and −5.0 MPa induced by PEG 6000.