SciELO - Scientific Electronic Library Online

 
vol.35 número4Parâmetros físicos e qualidade fisiológica de sementes de soja tratadas com diferentes volumes de caldaTemperatura sub-zero possibilita o armazenamento de sementes de Caesalpinia echinata Lam índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Journal of Seed Science

versão impressa ISSN 2317-1537

Resumo

VENSKE, Eduardo et al. Initial development of red and cultivated rice in response to light and air temperature. J. Seed Sci. [online]. 2013, vol.35, n.4, pp.510-518. ISSN 2317-1537.  http://dx.doi.org/10.1590/S2317-15372013000400013.

Light is an important factor in the cold protection process in plants. The objective of this study was to evaluate the relationship between temperatures and levels of quantity and quality of light on the initial development of rice cultivars and red rice biotypes. Two experiments were conducted, in the laboratory and in the greenhouse, from July to November 2012. The factors studied in experiment I were: temperatures (25 ºC and 18/13 ºC); cultivars/biotypes (IRGA 424 and PUITÁ INTA-CL/AV 6716 and AV 6722) and light (white, blue, green, yellow and red, 86% and 93% shading and dark). In the second experiment, the factors were seasons (August and November); cultivars/biotypes (IRGA 424 and PUITÁ INTA-CL/AV 6716 and AV 6722) and light (white with cover, white, blue, green, yellow and red, 86% and 93% shading). Were evaluated normal seedlings, shoot and root length, shoot and root dry weight and leaf area. The cultivars and biotypes studied have a similar behavior in response to temperature and light during early development. Light, especially the red wavelength, has increased cold tolerance in rice.

Palavras-chave : environmental stress; germination; emergency; seedling.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons