Photochemical activity of Cattleya harrisoniana (Orchidaceae) after sunfleck exposure

Autores/as

  • Jadson Bonini Zampirollo Universidade Federal do Espírito Santo
  • Clodoaldo Leites Pinheiro Embrapa Pecuária Sul
  • Diolina Moura Silva Universidade Federal do Espírito Santo
  • Antelmo Ralph Falqueto Universidade Federal do Espírito Santo

Resumen

Parameters of chlorophyll (Chl) a fluorescence were investigated in orchid plants (Cattleya harrisoniana Batem Ex. Lindl.) submitted to high light during 35 minutes, simulating a sunfleck. Reductions in Fv’/Fm’, ΦPSII and qP after high light were attributable to non-radiative energy dissipation, as indicated by the increase of 1-Fv’/Fm’ values, which contributed to a down regulation of photosystem II (PSII) avoiding the overreduction of the primary electron acceptor, quinone A (QA). Our results also indicated the occurrence of dynamic photoinhibition, evidenced through of recovery back to control values of all photosynthetic parameters after high light.

Palabras clave:

Light, Chlorophyll a fluorescence, Non-radiative energy dissipation, Ecophysiology

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Biografía del autor/a

Jadson Bonini Zampirollo, Universidade Federal do Espírito Santo

Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo.

Diolina Moura Silva, Universidade Federal do Espírito Santo

Departamento de Ciências Biológicas, Universidade Federal do Espírito Santo.

Antelmo Ralph Falqueto, Universidade Federal do Espírito Santo

Departamento de Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal do Espírito Santo.

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Vol. 16 Núm. 3 (2018)

Publicado:

2018-11-07

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Cómo citar

Zampirollo, J. B., Pinheiro, C. L., Silva, D. M., & Falqueto, A. R. (2018). Photochemical activity of Cattleya harrisoniana (Orchidaceae) after sunfleck exposure. Natureza Online, 16(3), 021–025. Recuperado a partir de https://naturezaonline.com.br/revista/article/view/464

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