Effects of seed osmopriming on germination of three herbage grasses at low temperatures
1996
Mauromicale, G. | Cavallaro, V. (University of Catania, Catania (Italy). Research Center for Strategic Field Crops in the Mediterranean Environment of the National Research Council)
Seed osmopriming was investigated as a means of improving germination performance of three herbage grasses (Festuca arundinacea Schreb. cv. Cigale, Dactylis glomerata L. cv. Lude, and Bromus catharticus Vahl. cv. Samson) under four suboptimal temperatures (2, 5, 8, and 11 deg C). Seeds were primed in aerated solutions of polyethylene glycol 6000 (PEG) or KNO3 or KNO3 + K2HPO4 at 18 +- 1 deg C and then rinsed and dried. Seed osmopriming, especially with salt solutions, significantly increased germination percentage of F. arundinacea and D. glomerata at 2 and 5 deg C, where the germination of untreated seeds was greatly reduced or inhibited. In B. catharticus osmopriming was of little but significant benefit only at 2 deg C. Primed seeds exhibited a significant increase in germination rate of the three herbage grasses under all the germination temperatures except at 12 deg C for B. catharticus. This positive effect was more evident in F. arundinacea and in salt primed seeds
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