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13 July 2016 Priming seeds in aqueous smoke solutions to improve seed germination and biomass production of perennial forage species
Y. Abu, J.T. Romo, Y. Bai, B. Coulman
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Abstract

Seeds of many forage species have dormancy, delaying germination in the field. Species from semi-arid environments may have adaptation to fire, therefore, the effects of priming seeds of common forage species in aqueous smoke solutions were studied. Seeds of eight grasses and two legumes were primed in serial dilutions of aqueous smoke solutions and then dried before germination tests. Depending on the species and concentrations of solutions, priming seeds acted independently or in interaction with light and (or) temperature to improve germination in Altai wildrye (Leymus angustus), green needlegrass (Nassella viridula), Kura clover (Trifolium ambiguum), needle-and-thread (Hesperostipa comata), northern wheatgrass (Elymus lanceolatus), orchard grass (Dactylis glomerata), plains rough fescue (Festuca hallii), Russian wildrye (Psathyrostachys juncea), and western wheatgrass (Pascopyrum smithii). Priming seeds of cicer milkvetch (Astragalus cicer) in distilled water or aqueous smoke solutions had no effect on germination (P > 0.05). Priming seeds in aqueous smoke solutions partially substituted the light requirement for germination in seven species. Priming seeds in aqueous smoke solutions before sowing in the field did not change total seedling emergence (P > 0.05), but increased standing crop for orchard grass and Plains rough fescue. Overall, the beneficial effects of priming in smoke solutions on perennial age species are less than species from environments adapted to more frequent fires.

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Y. Abu, J.T. Romo, Y. Bai, and B. Coulman "Priming seeds in aqueous smoke solutions to improve seed germination and biomass production of perennial forage species," Canadian Journal of Plant Science 96(4), 551-563, (13 July 2016). https://doi.org/10.1139/cjps-2015-0229
Received: 21 July 2015; Accepted: 1 December 2015; Published: 13 July 2016
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KEYWORDS
dactyle pelotonné
dormance
fétuque de Hall
graminée
grass
legume
Légumineuse
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