<b>Enzyme expression in <i>indica</i> and <i>japonica</i> rice cultivars under saline stress</b> - doi: 10.4025/actascibiolsci.v34i4.8535

  • Maria da Graça de Souza Lima Universidade Federal de Pelotas
  • Nei Fernandes Lopes Universidade Federal de Pelotas
  • Paulo Dejalma Zimmer Universidade Federal de Pelotas
  • Geri Eduardo Meneghello Universidade Federal de Pelotas
  • Cristina Rodrigues Mendes Universidade Federal de Pelotas
  • Luciano do Amarante Universidade Federal de Pelotas
Palavras-chave: electrophoresis, isoenzyme, krebs cycle, O. sativa L., salinity

Resumo

The southern State of Rio Grande do Sul (RS) is the main rice producer in Brazil with a 60% participation of the national production and 86% participation of the region. Rice culture irrigation system is done by flooding, which leads to soil salinization, a major environmental constraint to production since it alters the plants’ metabolism exposed to this type of stress. The indica cultivar, widely used in RS, has a higher sensitivity to salinity when compared to that of the japonica cultivar in other physiological aspects. Current research analyzes enzymes expression involved in salt-subjected indica and japonica rice cultivars’ respiration. Oryza sativa L. spp. japonica S.Kato (BRS Bojuru, IAS 12-9 Formosa and Goyakuman) and Oryza sativa L. spp. indica S. Kato (BRS Taim-7, BRS Atalanta and BRS Querencia) were the cultivars employed. Seedlings were transferred to 15 L basins containing 50% Hoagland nutrient solution increased by 0, 25, 50, 75 and 100 mM NaCl, and collected at 14, 28 and 42 days after transfer (DAT). Plant tissues were macerated and placed in eppendorf tubes with Scandálios extractor solution. Electrophoresis was performed in 7% of the polyacrylamide gels in vertical vats. Bands were revealed for the following enzymes systems: esterase, alcohol dehydrogenase, phosphoglucoisomerase, malate dehydrogenase, malic enzyme and alpha amylase. The enzymes expression was greater in subspecies japonica, with more intense bands in proportion to salinity increase. Results show that enzyme systems are involved in the salinity defense mechanisms in O. sativa spp. japonica cultivar.

 


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Biografia do Autor

Maria da Graça de Souza Lima, Universidade Federal de Pelotas
Doutoranda do Instituto de Biologia, Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Campus Universitário s/n. CEP: 96010-900, Caixa Postal 354,*Corresponding author: peccoli@gmail.com
Nei Fernandes Lopes, Universidade Federal de Pelotas
Eng. Agrônomo, PhD. Prof. Departamento de Botânica, UFPel.
Paulo Dejalma Zimmer, Universidade Federal de Pelotas
Eng. Agrônomo, Dr. Prof. Adjunto Departamento de Fitotecnia, FAEM, UFPel
Geri Eduardo Meneghello, Universidade Federal de Pelotas
Eng. Agrônomo Dr. Departamento de Fitotecnia, FAEM, UFPel.
Cristina Rodrigues Mendes, Universidade Federal de Pelotas
Doutoranda do Instituto de Biologia, Departamento de Botânica, Universidade Federal de Pelotas, Pelotas, RS, Campus Universitário s/n. CEP: 96010-900, Caixa Postal 354
Luciano do Amarante, Universidade Federal de Pelotas
Eng. Agrônomo, Dr.Prof. Adjunto do Departamento de Bioquímica, IQG, UFPel.
Publicado
2012-03-23
Como Citar
Lima, M. da G. de S., Lopes, N. F., Zimmer, P. D., Meneghello, G. E., Mendes, C. R., & Amarante, L. do. (2012). <b>Enzyme expression in <i>indica</i> and <i>japonica</i> rice cultivars under saline stress</b&gt; - doi: 10.4025/actascibiolsci.v34i4.8535. Acta Scientiarum. Biological Sciences, 34(4), 473-481. https://doi.org/10.4025/actascibiolsci.v34i4.8535
Seção
Morfofisiologia Vegetal

 

0.6
2019CiteScore
 
 
31st percentile
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0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus