Desvendando a H+-Pirofosfatase vacuolar e o seu papel na biotecnologia vegetal

Autores

  • Arthur F Siqueira Centro Universitário Vila Velha
  • Zilma MA Cruz Centro Universitário Vila Velha
  • Suellen Queiroz Centro Universitário Vila Velha
  • Osvaldo JAM Rocha Centro Universitário Vila Velha
  • Daniela NES Soares Centro Universitário Vila Velha
  • Alessandro C Ramos Centro Universitário Vila Velha

Resumo

As proteínas de membrana são de fundamental importância para manter o funcionamento da célula e a homeostase iônica dos seres-vivos. Há uma diversidade de proteínas que ajudam a manter o gradiente iônico entre o meio intra e extracelular, entre as quais, a H+-ATPase e a H+-pirofosfatase (H+-PPase) tem um importante destaque. A H+-PPase está presente na membrana do vacúolo das células das plantas e sua principal função é transportar H+ para o lúmem, criando uma força elétron-motriz que impulsiona o transporte secundário de íons e compostos orgânicos. Esta enzima é diferencialmente regulada em condições de stress conferindo uma maior tolerância das plantas aos fatores bióticos e abióticos. Atualmente, sabe-se que o gene que codifica a H+-PPase quando super-expressado, estimula o crescimento vegetal via um maior desenvolvimento radicular e, conseqüentemente, maior absorção de água e nutrientes. Além disso, uma maior resistência ao stress salino foi observada. Novos estudos são realizados para elucidar os processos fisiológicos causados pela super-expressão da H+-PPase objetivando uma possível aplicação na produção vegetal, em solos com baixa fertilidade.

Palavras-chave:

H+-PPase, pirofosfatase, AVP1, super-expressão, estresse

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Biografia do Autor

Zilma MA Cruz, Centro Universitário Vila Velha

Mestrado em Ecologia de Ecossitemas.

Osvaldo JAM Rocha, Centro Universitário Vila Velha

Mestrado em Ecologia de Ecossitemas.

Daniela NES Soares, Centro Universitário Vila Velha

Mestrado em Ecologia de Ecossitemas.

Alessandro C Ramos, Centro Universitário Vila Velha

Mestrado em Ecologia de Ecossitemas.

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Publicado:

2008-01-01

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Como Citar

Siqueira, A. F., Cruz, Z. M., Queiroz, S., Rocha, O. J., Soares, D. N., & Ramos, A. C. (2008). Desvendando a H+-Pirofosfatase vacuolar e o seu papel na biotecnologia vegetal. Natureza Online, 6(1), 9–15. Recuperado de https://naturezaonline.com.br/revista/article/view/414

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