Physiological quality of white oat seeds at different temperatures

Luana de Carvalho Catelan, Luana de Souza Marinke, Marinara Ferneda Ventorim, Lúcia Sadayo Assari Takahashi

Abstract


White oats are cereals that are grown in different regions of the globe because they have good adaptability and final destination. Thus, their cultivation has shown significant increases in order to meet demand, especially for forage production, grains, and animal and human consumption. High-quality seeds are necessary for crop cultivation and white oats are sown in winter when thermal fluctuations may occur. Therefore, the objective of this study was to evaluate the physiological changes in oat seeds exposed to different temperatures during the germination phase. The experiment was a completely randomized design with four replications in a 6 × 4 factorial design. Six cultivars were evaluated: Aphrodite, Altiva, Artemis, Brava, Corona, and Guará at temperatures of 15, 20, 25, and 30 °C, and the following measurements were taken: first germination count, germination, germination speed index (IVG), and seedling length and mass. The results were analyzed using analysis of variance (F test) and the means were compared using Tukey’s test. The cultivars were physiologically affected at the minimum and maximum temperatures. At 15 °C, normal seedlings did not form, whereas the highest germination values were recorded at 20 and 25 ºC, which showed that these temperatures were the most favorable temperatures for the germination process. Vigor declined at 30 °C and there was a greater number of abnormal seedlings and dead seeds.

Keywords


Avena sativa L.; Physiological quality; Vigor.

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References


Bewley, J. D., Bradford, K. J., Hilhorst, H. W. M., & Nonogaki, H. (2013). Seeds: physiology of development germination and dormancy. Nova York, NY: Springer.

Carvalho, N. M., & Nakagawa, J. (2012). Sementes: ciência, tecnologia e produção. Joboticabal, FUNEP.

Castro, G. S. A., Costa, C. H. M., & Ferrari, J., Neto. (2012). Ecofisiologia da Aveia. Scientia Agraria Paranaensis. 11(3), 1-15. doi: 10.18188/sap.v11i3.4808

Companhia Nacional de Abastecimento (2020). Acompanhamento de safra brasileira: grãos – 2019/20 - 4º Levantamento. Recuperado de http://www.conab.gov.br




DOI: http://dx.doi.org/10.5433/1679-0359.2021v42n3Supl1p1473

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional