The germination responses of primed canola seeds to varying temperatures

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MALEK M.; GHADERI FAR F.; TORABI B.; SADEGHIPOUR H.R.

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Journal: Journal of Plant Production Research Year:2019 | Volume:26 | Issue:2 Page(s): 215-227

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Title

The germination responses of primed canola seeds to varying temperatures

Author(s)

MALEK M. | GHADERI FAR F. | TORABI B. | SADEGHIPOUR H.R. | Issue Writer Certificate

Keywords

DormancyQ1

HydroprimingQ1

OsmoprimingQ1

Secondary dormancyQ1

Abstract

Background and Objectives: Optimal seed germination guarantees the plant stability, establishment and yield. Uniform and rapid germination and emergence of seeds under various environmental conditions play a significant role in achieving suitable yield. Nowadays, there are several ways to improve seed characteristics, and one of the most commonly used ones is seed priming. Priming can increase the percentage, rate and uniformity of seed germination and emergence. These in turn results in the establishment of vigorous plant especially under environmental stresses and lead to success in production. In addition, knowledge on the physiological responses of primed seeds to different environmental conditions, including temperature stress, can increase the effectiveness of this technique. Therefore in this study, the germination reaction of primed seeds of canola cultivars to temperature was investigated. Materials and Methods: The canola cultivars used in this study included DK-xpower, Traper and Hayola50. Hydropriming and Osmopriming methods were used as the priming treatments. Germination tests in primed and non-primed seeds were carried out at 5, 10, 15, 20, 25, 30, 35, 37 and 40 ° C. Then the response of germination rate and germination percentage to temperature was investigated. Results: The germination percentages of canola seeds were different in cultivars in response to temperature and priming treatments, and each cultivar had a distinct behavior. The effects of priming on germination percentage were significant at low temperatures in Hayola50 and Traper cultivars. In addition, priming in all the studied cultivars could significantly increase the germination percentages at high temperatures. Germination rates were also affected by priming treatments and temperature. At each temperature, the germination rates of primed seeds were higher than non-primed ones. In all three canola cultivars, priming reduced the base temperature (from 0. 4 to 1. 5 ° C). The optimum temperature was also strongly affected by priming treatments, especially in the Traper and Hayola50 cultivars. Moreover, ceiling temperatures in primed seeds increased compared with control seeds (by about 1 to 5 ° C). Under various temperatures, Hydropriming was more effective than Osmopriming. Conclusion: Priming treatments were generally able to improve seed germination of canola cultivars at different temperatures. In addition, priming by either removing the secondary Dormancy at low temperatures and/or improved germination under high temperatures was able to improve germination indices at treated temperatures. Finally, priming could reduce the sensitivity of seed germination to the temperature and increase its tolerance to high temperatures.

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APA: Copy

MALEK, M., GHADERI FAR, F., TORABI, B., & SADEGHIPOUR, H.R.. (2019). The germination responses of primed canola seeds to varying temperatures. JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(2 ), 215-227. SID. https://sid.ir/paper/155667/en

Vancouver: Copy

MALEK M., GHADERI FAR F., TORABI B., SADEGHIPOUR H.R.. The germination responses of primed canola seeds to varying temperatures. JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;26(2 ):215-227. Available from: https://sid.ir/paper/155667/en

IEEE: Copy

M. MALEK, F. GHADERI FAR, B. TORABI, and H.R. SADEGHIPOUR, “The germination responses of primed canola seeds to varying temperatures,” JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 2 , pp. 215–227, 2019, [Online]. Available: https://sid.ir/paper/155667/en

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