Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/33900
Título: Leaf nitrogen supply improves sugarcane photosynthesis under low temperature
Palavras-chave: Saccharum spp.
Carboxylation
Leaf gas exchange
Urea
Winter
Data do documento: 30-Jan-2019
Editor: Academy of Sciences of the Czech Republic (ASCR), Institute of Experimental Botany (IEB)
Citação: CERQUEIRA, G. et al. Leaf nitrogen supply improves sugarcane photosynthesis under low temperature. Photosynthetica, [S.l.], v. 57, n. 1, p. 18-26, 2019. DOI: 10.32615/ps.2019.033.
Resumo: This study aimed to test the hypothesis that increases in leaf nitrogen concentration would reduce the sensitivity of sugarcane photosynthesis to low temperature. IACSP95-5000 plants were grown inside a growth chamber at 30/20oC (day/night) and we evaluated the effects of leaf nitrogen spraying (2.5% urea) on plants facing low temperature (22/12°C) for eight days. The leaf nitrogen supply increased leaf nitrogen concentration and plants exhibited higher leaf gas exchange as compared to nonsprayed ones. We also found higher activity of the carboxylation enzymes, Rubisco and phosphoenolpyruvate carboxylase, as well as a higher chlorophyll content in plants sprayed with nitrogen. Such enhancement of photosynthetic performance was associated with an increase in number of leaves and in total leaf area. Our results suggest that the effects of low temperature on photosynthesis of field-grown sugarcane plants could be alleviated by leaf nitrogen supply, with likely consequences for biomass production and crop yield.
URI: http://repositorio.ufla.br/jspui/handle/1/33900
Aparece nas coleções:DBI - Artigos publicados em periódicos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
ARTIGO_Leaf nitrogen supply improves sugarcane photosynthesis under low temperature.pdf749,91 kBAdobe PDFVisualizar/Abrir


Este item está licenciada sob uma Licença Creative Commons Creative Commons