Photosynthetic limitations in leaves of arabic coffee promoted by the water deficit

Authors

  • Anelisa Figueiredo Peloso Universidade Federal do Espírito Santo Mestre em Produção Vegetal
  • Sandro Dan Tatagiba Instituto Federal do Pará Professor Adjunto
  • Edvaldo Fialho Reis Universidade Federal do Espírito Santo Professor Titular
  • José Eduardo Macedo Pezzopane Universidade Federal do Espírito Santo Professor Associado
  • José Francisco Teixeira Amaral Universidade Federal do Espírito Santo Professor Associado

DOI:

https://doi.org/10.25186/cs.v12i3.1314

Keywords:

Coffea arabica, fluorescence of chlorophyll a, gas exchange, photosynthetic. pigments, water stress,

Abstract

The objective of this study was to investigate the photosynthetic limitations in leaves of Coffea arabica, Catuaí Vermelho (IAC 144), subjected to water deficit, using this, the parameters of gas exchange photosynthesis [net CO2 assimilation rate(A), stomatal conductance (gs), transpiration rate (E) and internal CO2 concentration (Ci)], the chlorophyll fluorescence a parameters {minimal fluorescence (F0), maximum fluorescence (Fm), maximum quantum efficiency of photosystem II (Fv/Fm), yield of photochemical [Y(II)], yield of regulated energy dissipation [Y(NPQ)] and yield of non-regulated dissipation losses [Y(NO)]} as well as on the concentrations of chloroplastidic pigments and the electrolyte leakage (EE) in leaves plants grown at 30, 60 and 100% of water available (WA) on the substrate. According to the results it was found that the water deficit affected photosynthesis of plants, either through lower efficiency of energy use by the photochemical apparatus, and by significant decreases obtained in gs, which were associated with the decrease in the amounts of A. Reduction in Y(II) and increases in Y(NPQ) and Y(NO) have been associated with water deficit, suggesting that there was a decrease in the electron transport rate, leading to less use of light energy for photochemical. Interestingly, the F0 values Fm and Fv/Fm were not associated with the loss of photochemical function, chlorophylls and cell damage caused by the intensification of the water deficit.

Author Biographies

Anelisa Figueiredo Peloso, Universidade Federal do Espírito Santo Mestre em Produção Vegetal

Departamento de Engenharia Rural

Fitotecnia

Sandro Dan Tatagiba, Instituto Federal do Pará Professor Adjunto

 

Campus Itaituba - PA

Fisiologia Vegetal

Edvaldo Fialho Reis, Universidade Federal do Espírito Santo Professor Titular

Departamento de Engenharia Rural

Recursos Hídricos e Geoprocessamento em Sistemas Agrícolas

 

José Eduardo Macedo Pezzopane, Universidade Federal do Espírito Santo Professor Associado

Departemento de Ciências Florestais e da Madeira

Silvicultura

José Francisco Teixeira Amaral, Universidade Federal do Espírito Santo Professor Associado

Departamento de Engenharia Rural

Fitotecnia

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Published

2017-09-06

How to Cite

PELOSO, A. F.; TATAGIBA, S. D.; REIS, E. F.; PEZZOPANE, J. E. M.; AMARAL, J. F. T. Photosynthetic limitations in leaves of arabic coffee promoted by the water deficit. Coffee Science - ISSN 1984-3909, v. 12, n. 3, p. 389 - 399, 6 Sep. 2017.

Issue

Vol. 12 No. 3 (2017)

Section

Articles

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