Abstract

Synechocystis sp. PCC6803 exhibited a high degree of variation in biomass and lipid production rates in response to temperature changes in a photobioreactor. Compared with an optimal temperature of 30-33. °C, a higher temperature of 44. °C and lower temperatures of 22. °C and 18. °C severely inhibited the specific growth rate (up to a 66% decrease), biomass production rate (up to a 71% decrease), nutrient utilization rates (up to a 77% decrease), and lipid production rate (up to a 80% decrease). Temperature stress triggered changes in the relative percentage of individual fatty acids (mainly for C16:0 and C18:3), and degree of unsaturation significantly changed: 0.87 at 30. °C, 0.62 at 44. °C, and 1.29 at 18. °C. Although PCC6803 survived temperature stress and maintained its predominate position in the culture, it could not fully recover from long-term temperature stress. Thus, avoiding prolonged exposure to extreme temperature is crucial for using PCC6803 as feedstock for biofuel production.

Original languageEnglish (US)
Pages (from-to)11218-11225
Number of pages8
JournalBioresource Technology
Volume102
Issue number24
DOIs
StatePublished - Dec 1 2011

Keywords

  • Biomass production
  • Fatty acids
  • Lipids
  • Synechocystis sp. PCC6803
  • Temperature

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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