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Abstract : |
The effects of temperature, light and storage on the germination of Ulmus glabra and Ulmus laevis seeds were studied. Germination tests were carried out under constant temperatures of 20°C and alternating temperatures of 30/20°C. Temperature significantly affected seed germination of U. glabra not stored, and seed germination was the highest at 30/20°C under dark or light. Temperature and light (0 or 8 h) did not significantly affect germination of U. laevis seeds not stored. When seeds were stored for 2 years, seed germination of U. glabra and U. laevis was significantly affected by temperature and light (0, 8, 6 and 24 h). Two years storage of U. glabra seeds increased light demands for germination percentage, and the seeds could be stored at 4°C for 2 years without losing its viabilities when germinated at 30/20°C under light. Although germination percentage and germination rate of U. laevis seeds reduced after 2 years of storage, germination parameters were still quite high when seeds were germinated at 30/20°C under light. , The effects of temperature, light and storage on the germination of Ulmus glabra and Ulmus laevis seeds were studied. Germination tests were carried out under constant temperatures of 20أƒâ€ڑأ‚آ°C and alternating temperatures of 30/20أƒâ€ڑأ‚آ°C. Temperature significantly affected seed germination of U. glabra not stored, and seed germination was the highest at 30/20أƒâ€ڑأ‚آ°C under dark or light. Temperature and light (0 or 8 h) did not significantly affect germination of U. laevis seeds not stored. When seeds were stored for 2 years, seed germination of U. glabra and U. laevis was significantly affected by temperature and light (0, 8, 6 and 24 h). Two years storage of U. glabra seeds increased light demands for germination percentage, and the seeds could be stored at 4أƒâ€ڑأ‚آ°C for 2 years without losing its viabilities when germinated at 30/20أƒâ€ڑأ‚آ°C under light. Although germination percentage and germination rate of U. laevis seeds reduced after 2 years of storage, germination parameters were still quite high when seeds were germinated at 30/20أƒâ€ڑأ‚آ°C under light., |
