nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (1): toevoegen | toon Print deze pagina

one publication added to basket [243095]
Light acclimation and pH perturbations affect photosynthetic performance in Chlorella mass culture
Ihnken, S.; Beardall, J.; Kromkamp, J.C.; Gómez Serrano, C.; Torres, M.A.; Masojídek, J.; Malpartida, I.; Abdala, R.; Gil Jerez, C.; Malapascua, J.R.; Navarro, E.; Rico, R.M.; Peralta, E.; Ferreira Ezequil, J.P.; Lopez Figueroa, F (2014). Light acclimation and pH perturbations affect photosynthetic performance in Chlorella mass culture. Aquat. Biol. 22: 95-110. http://dx.doi.org/10.3354/ab00586
In: Aquatic Biology. Inter Research: Germany. ISSN 1864-7782; e-ISSN 1864-7790, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Chlorella M.Beijerinck, 1890 [WoRMS]
Author keywords
    Chlorella; Mass culture; pH perturbance; Chlorophyll fluorescence; Oxygen production; pH drift; Photosynthesis; Photoprotection

Auteurs  Top 
  • Ihnken, S., meer
  • Beardall, J.
  • Kromkamp, J.C.
  • Gómez Serrano, C.
  • Torres, M.A.
  • Masojídek, J.
  • Malpartida, I.
  • Abdala, R.
  • Gil Jerez, C.
  • Malapascua, J.R.
  • Navarro, E.
  • Rico, R.M.
  • Peralta, E.
  • Ferreira Ezequil, J.P.
  • Lopez Figueroa, F

Abstract
    Chlorella spp. are robust chlorophyte microalgal species frequently used in mass culture. The pH optimum for growth is close to neutrality; at this pH, theoretically little energy is required to maintain homeostasis. In the present study, we grew Chlorella fusca cells in an open, outdoor, thin-layer cascade photobioreactor (TLC), under ambient photon flux at the theoretically preferred pH (7.2), and let the culture pass the exponential growth phase. Using pH drift experiments, we show that an alkalization to pH 9 supported photosynthesis in the TLC. The increased photosynthetic activity under alkaline conditions was a pH-dependent effect, and not a dissolved inorganic carbon (DIC) concentration- or light intensity-dependent effect. Re-acidification (in one step or in increments) lowered gross oxygen production and increased non-photochemical quenching in short-term experiments. Gross oxygen production and electron transport rates in PSII were uncoupled during the pH perturbation experiments. Electron transport rates were only marginally affected by pH, whereas oxygen production rates decreased with acidification. Alternative electron pathways, electron donation at the plastid terminal oxidase and state-transitions are discussed as a potential explanation. Because cell material from the TLC was not operating at maximal capacity, we propose that alkalization can support photosynthesis in challenged TLC systems.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .