Germination and vigor of linseed seeds under different conditions of light, temperature and water stress

Authors

  • Raquel Stefanello Universidade Federal de Santa Maria
  • Bruna Boucinha Viana Universidade Federal de Santa Maria
  • Luiz Augusto Salles das Neves Universidade Federal de Santa Maria

DOI:

https://doi.org/10.5433/1679-0359.2017v38n3p1161

Keywords:

Linum usitatissimum, Physiological quality, Polyethylene glycol.

Abstract

Linseed (Linum usitatissimum L.), cultivated from seeds, is one of the oldest plants domesticated by humans and is popularly used as a medicine. It can be used as the raw material to produce oil and bran because it has high lipids content, fiber and proteins. Based on the economic potential of this species and the need for more information about its physiology, the goal of this study was to analyze the effects of light, temperature and water stress on the germination and vigor of linseed seeds. In experiment I the seeds were sown on paper at constant temperatures of 15, 20, 25 and 30 ºC in the presence and absence of light. In experiment II, the seeds were placed on paper germitest soaked in solutions of polyethylene glycol (PEG 6000) at osmotic potentials corresponding to zero, -0.10, -0.20, -0.30, -0.40, -0.50 and -0.60 MPa. To evaluate the physiological potential, the following tests were made: germination, first germination count, length and dry mass of seedlings, and water stress. It was found that the highest percentages of germination and vigor occurred at a constant temperature of 20 °C, both in the presence and absence of light. The reduction of the osmotic potential of the substrate promoted a significant decrease in the germination and vigor of the linseed seeds. Osmotic potentials equal or less than -0.30 MPa were harmful to germination and there was no normal seedling development starting at -0.50 MPa.

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Author Biographies

Raquel Stefanello, Universidade Federal de Santa Maria

Bióloga, Drª em Agronomia, Departamento de Biologia, Universidade Federal de Santa Maria, UFSM, Santa Maria, RS, Brasil.

Bruna Boucinha Viana, Universidade Federal de Santa Maria

Discente, Curso de Zootecnia, UFSM, Santa Maria, RS, Brasil.

Luiz Augusto Salles das Neves, Universidade Federal de Santa Maria

Engº Agrº, Prof. Dr., Departamento de Biologia, UFSM, Santa Maria, RS, Brasil.

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Published

2017-06-13

How to Cite

Stefanello, R., Viana, B. B., & Neves, L. A. S. das. (2017). Germination and vigor of linseed seeds under different conditions of light, temperature and water stress. Semina: Ciências Agrárias, 38(3), 1161–1168. https://doi.org/10.5433/1679-0359.2017v38n3p1161

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