ISHS Acta Horticulturae 200: II International Symposium on Processing Tomatoes, XXII IHC
STORAGE LIFE AND VIGOR OF TOMATO (LYCOPERSICON ESCULENTUM MILL.) SEEDS FOLLOWING OSMOTIC PRIMING |
| Authors: | D. Alvarado, K.J. Bradford |
| Abstract:
Although osmotic priming has been shown to enhance tomato seed vigor, little is known of the longevity of the priming effect of the consequences for seed viability during long-terms storage. Tomato seeds were osmotically primed in -1.25 MPa PEG or 3% (w/v) KNO3 solutions and were tested for germination and emergence in the laboratory and field. Seeds were stored at 10, 20, and 30 degrees C, for over one year and were retested at 2-month intervals. The reduction in the time 50% germination due to priming was retained for at least 18 months at the lower temperatures. At 30 degrees C, primed seeds were more susceptible to loss of viability and than unprimed seeds, particulary for KNO3-primed seeds. A similar trend was obseved in field emergence. Priming seeds for the first time after storage was as effective as it had been before storage. A second priming treatment of stored primed seeds was of some benefit, but did not entirely reverse the detrimental effects of high temperature storage. | |
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