Effects of temperature and PEG solution on germination and seedling elongation in corn hybrids and inbreds
1988
Seong, R.C. | Shim, J.S. (Paechai Univ., Taejon (Korea R.). Dept. of Horticulture) | Park, K.Y. (Rural Development Administration, Suwon (Korea R.). Crop Experiment Station)
Germination and seedling elongation of three hybrids and their five inbreds of corn [Suwon 19 : KS 5 x KS 6, Hoengsongok : (KS 15 x KS 16) KS 5, and Jinjuok : (KS 15 x KS 16) Ga 209] were measured at two temperatures (15 and 30 C) and four polyethylene glycol (PEG) 10,000 solutions (0, 20, 30 and 35g/ 100gH2O). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.5, -1.1 and -1.5 MPa at room temperature. Observations were taken at 3, 6, 9 and 12 days for 15 C and 1, 2, 3 and 4 days for 30 C. Fifteen seeds of each of three corn hybrids and their five inbreds were placed on whatman No. 1 (9cm) filter paper in plastic petridishes, and adjusted to 15 ml of the proper PEG 10,000 solution supplemented with 0.2 percent thiram using automatic syringe. The dishes were covered with caps. The seeds were germinated at a constant temperature of 15 or 30 C under dark condidtions for a programmed period
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