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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/68656
Title: 
Efeito da temperatura na germina̧ão de sementes de Sebastiania commersoniana (Baillon) Smith & Downs separadas pela colora̧ão do tegumento
Other Titles: 
Effect of temperature on Sebastiania commersoniana (Baillon) Smith & Downs seed germination separated by coat colour
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
1413-9324
Abstract: 
Sebastiania commersoniana (Euphorbiaceae) is a tree species of riparian forests in Brazil. Seeds of this species released from mature fruits have heteromorphy in coat colour: dark (dark-brown to black), striated (dark with light-grey stria) and clear (light-grey to whitish). In this work two experiments were carried out in order to study the effect of temperature on seed germination in interaction with coat colour. Germination final percentage and speed index were evaluated. In the first experiment seeds of the three colours were submitted to constant (30°C) and alternating (20-35°C) temperatures. For all the seed colours, best results were obtained at alternating temperature. Physiological quality of striated seeds was greater than those clear seeds and dark seeds were intermediate. In the second experiment striated and clear seeds were submitted to three amplitudes of alternating temperature: 5°C (20-25°C and 25-30°C), 10°C (20-30°C and 25-35°C) and 15°C (20-35°C). Both germination percentage and speed were higher in striated seeds and for the two seed colours, best results were obtained at 20-30°C and 20-35°C. These temperatures are recommended for the germination test.
Issue Date: 
1-Dec-2005
Citation: 
Scientia Forestalis/Forest Sciences, n. 69, p. 77-83, 2005.
Time Duration: 
77-83
Keywords: 
  • Coat colour
  • Forest seed
  • Germination
  • Physiological quality
  • Sebastiania commersoniana
  • Temperature
  • Coat color
  • Biodiversity
  • Forestry
  • Seed
  • Forests
  • Seeds
Source: 
http://www.ipef.br/publicacoes/scientia/nr69/cap06.pdf
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/68656
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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