The Influence of Temperature on Sunflower (Helianthus annuus L.) Germination and Development

Authors

  • Gessé Almeida Santos Cesumar
  • Patricia da Costa Zonetti Cesumar

Keywords:

Helianthus annuus L., Temperatura, Germinação, Desenvolvimento, Temperature, Germination, Development.

Abstract

Environmental conditions affect plants germination and development. The temperature is one of these factors. The aim of this paper was to evaluate the influence of different temperatures on germination and development of sunflower plants (Helianthus annuus L.). The seeds germinated in different temperatures: 25; 27,5; 30 and 32,5 ºC. Temperatures were controlled in B.O.D chamber. The evaluations were carried out seven days after the beginning of the assay. Germination percentage and seed germination rate, primary root and shoot length, fresh root and shoot biomass were evaluated. Variance analysis and regression analysis were also carried out. It was observed significant effect of temperature on germination percentage and speed rates. Sunflower seeds presented better germination percentile on the 25 to 27,5º C range. High temperatures negatively affected germination speed rate. The higher number of germinated seeds per unit of time was obtained at 30º C. Higher temperatures negatively affected the development of plants, especially on the shoot in comparison to the root.

Author Biographies

Gessé Almeida Santos, Cesumar

Biólogo, Licenciado em Ciências Biológicas pelo Centro Universitário de Maringá - CESUMAR. E-mail: cagesantos@gmail.com

Patricia da Costa Zonetti, Cesumar

Docente Doutora do Curso de Ciências Biológicas do Centro Universitário de Maringá – CESUMAR. E-mail: patriciazonetti@cesumar.br

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Published

2009-07-06

How to Cite

Santos, G. A., & Zonetti, P. da C. (2009). The Influence of Temperature on Sunflower (Helianthus annuus L.) Germination and Development. Iniciação Científica Cesumar, 11(1), 23–27. Retrieved from https://periodicos.unicesumar.edu.br/index.php/iccesumar/article/view/1038

Issue

Vol. 11 No. 1 (2009)

Section

Artigos de Iniciação Científica

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